Page 1 ___________________ Introduction Product-specific safety ___________________ information ___________________ Industrial Controls Product overview for 3SK1 ___________________ Safety systems - General information Safety engineering SIRIUS 3SK1 safety relays ___________________ 3SK1 devices ___________________ System configuration Manual ___________________ Circuit diagrams ___________________ Mounting ___________________ Connection ___________________...
Page 2 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.
Page 3: Table Of Contents
Safety function ........................31 Basic terminology ........................33 4.3.1 Redundancy/single-channel and two-channel ................ 33 4.3.2 Cross-circuit detection ......................34 4.3.3 Enabling circuit (safety-related output) ................... 34 4.3.4 Signaling circuit ........................35 4.3.5 Feedback circuit ........................35 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 4 Design ............................ 69 5.2.7.3 Terminal assignment ......................70 5.2.8 3SK1122 Advanced basic unit instantaneous (with semiconductor outputs) ......72 5.2.8.1 Device features ........................72 5.2.8.2 Design ............................ 73 5.2.8.3 Terminal assignment ......................74 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 5 General information on the Advanced system ..............101 6.1.3 Maximum system configuration .................... 102 3ZY12 device connector ....................... 106 6.2.1 Device features ........................106 6.2.2 Applications ........................... 108 System configuration rules ....................109 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 6 Wiring rules for spring-loaded terminals (with push-in technology) ........172 9.1.6 Connecting the push-in terminals ..................173 9.1.7 Disconnecting the push-in terminals ..................175 9.1.8 Attaching the terminals ......................176 9.1.9 Disconnecting ........................177 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 7 13.2 General technical data ......................203 Dimension drawings ..........................209 14.1 Dimension drawings for 3SK1 devices ................. 209 14.2 Dimension drawings for 3SK1 device connector ..............217 Accessories ............................223 Index ..............................225 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 8 Table of contents SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 9: Introduction
● Safety systems Validity range The manual is valid for these safety relays SIRIUS 3SK1. It describes the components that are valid at the time of publication. SIEMENS reserves the right of including a Product Information for each new component, and for each component of a later version.
Page 10: Service&Support
Online Support The Online Support in the Service&Support portal is an extensive information system for all questions relating to Siemens products and solutions. This service enables direct and central access to in-depth information concerning the products, systems and applications for industry and to a large number of programming, configuration and application examples.
Page 11 ● Background and system descriptions ● Performance statements ● Demonstration systems/videos Link: Applications & Tools (http://support.automation.siemens.com/WW/view/en/20208582) My Documentation Manager My Documentation Manager enables you to compile your own documentation from our standard documents (manuals), which are located in the Product Support section. Under mySupport, you have the opportunity to create and manage you own compilations in a structure of their own.
Page 12: Configurator For 3Sk1 Safety Relays
DataMatrix code A DataMatrix code is lasered onto the lower terminal cover of all 3SK1-series safety relays. DataMatrix codes are standardized in ISO/IEC 16022. The DataMatrix codes on Siemens devices use ECC200 coding for powerful error correction. The following device information is encoded in the DataMatrix codes as a bit stream: ●...
Page 13: Correction Sheet
(MLFB) in the SIEMENS Service&Support Portal, such as operating instructions, manuals, data sheets, FAQs, etc. We offer the SIEMENS Industry Support App free for this purpose. This can be used on commercially available smartphones and tablet PCs.
Page 14 Introduction 1.9 History SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 15: Product-Specific Safety Information
The devices must be protected against conductive contamination while taking account of the ambient conditions. You can achieve this by installing the devices in a control cabinet with the appropriate degree of protection. You will find more detailed information in IEC 60529, for example. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 16 • PELV / SELV power supply units (please also note the documentation for the respective power supply unit in this regard). Note Cover the 3ZY12 device connector on the left-hand side using the cover supplied with the device termination connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 17 2.5 ms. Users are responsible for ensuring that this does not result in any actuator changing to the active state. Note 3ZY12 device connectors Only safety relays with a supply voltage of 24 V DC may be used on the 3ZY12 device connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 18: Intended Use
Proper use of hardware products This equipment is only allowed to be used for the applications described in the catalog and in the technical description, and only in conjunction with non-Siemens equipment and components recommended by Siemens. Correct transport, storage, installation and assembly, as well as careful operation and maintenance, are required to ensure that the product operates safely and without faults.
Page 19: Declaration Of Conformity
2.4 Declaration of conformity Declaration of conformity The manufacturer declares that the safety components of the SIRIUS 3SK1 series in the designs marketed by us comply with the applicable basic safety and health requirements of the EC Directives* stated (including amendments) and that the stated standards* were applied in their design and construction.
Page 20 Product-specific safety information 2.4 Declaration of conformity SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 21: Product Overview For 3Sk1
3SK1120-xAB40 output) x = 1: screw terminals; x = 2: push-in terminals y = 1: 0.05 ... 3 s; y = 2: 0.5 ... 30 s; y = 4: 5 ... 300 s SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 22 ✓ xAB40 3SK1121- ✓ xCB4x 3SK1122- ✓ xAB40 3SK1122- ✓ xCB4x 3SK1120- ✓ xAB40 Standard 3SK1111- xAxx0 3SK1112- xBB40 Output expansions 3SK1211 ✓ (for 24 V DC) 3SK1213 ✓ (for 24 V DC) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 23 Product overview for 3SK1 3.1 Overview Online configurator To assist you with configuration, the "SIRIUS 3SK1 safety relay configurator" is at your disposal on the Internet (http://www.siemens.com/industrial-controls/configurators). You can select and order the correct safety relays here and generate the complete product documentation: ●...
Page 24: Overview Of Components And Accessory Parts
Device connector for 3SK1 safety relay, 17.5 mm wide ⑫ Device connector for 3SK1 safety relay, 22.5 mm wide ⑬ Device termination connector for 3SK1 safety relay, 22.5 mm wide ⑭ Sealable cover SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 25: Functional Scope Of The 3Sk1 Basic Units
Cannot be used ✓ ✓ Rated control supply voltage 24 V DC ✓ ✓ ✓ ✓ 110 ... 240 V AC/DC ✓ Not possible ✓ ✓ Possible using 3SK1230 power supply and device connector SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 26: Introduction
3.4 Introduction Introduction SIRIUS 3SK1 safety relays are used mainly in autonomous safety applications that are not connected to a safety-related bus system. Here they are used to evaluate sensors and ensure safety-related shutdown when required. They also check and monitor the sensors, actuators, and the safety-related functions of the safety relay.
Page 27: 3Sk1 System
– Output expansion 3SK1211 (Page 86) – Output expansion 3SK1213 (Page 89) The devices are connected using wiring. Typical 3SK1 Standard system configuration ① Basic unit 3SK1 Standard ② Output expansion 3SK1211 ③ Output expansion 3SK1213 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 28: Advanced
In this case, all necessary signals are exchanged via the device connector. You will find the rules for configurations with device connectors in the section "System configuration rules (Page 109)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 29 3SK1213 output expansion Typical 3SK1 Advanced system configuration with 3RM1 Failsafe motor starter ① 3SK1220 input expansion ② 3SK1 basic unit Advanced ③ 3SK1211 output expansion ④ 3RM1 Failsafe motor starter output expansion SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 30 Product overview for 3SK1 3.5 3SK1 system ① 3SK1230 power supply ② 3SK1220 input expansion ③ 3SK1 basic unit Advanced ④ 3SK1211 output expansion ⑤ 3RM1 Failsafe motor starter output expansion ⑥ 3SK1213 output expansion SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 31: Safety Systems - General Information
For further information, refer to the brochure "Safety of machines and plants" which is available here as a download: Functional safety (http://www.siemens.com/safety). Safety function A safety function describes the reaction of a machine/plant to the occurrence of a specific event (e.g.
Page 32 Safety systems - General information 4.2 Safety function SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 33: Basic Terminology
IEC 61508 and PL e (Cat. 4) in accordance with DIN EN ISO 13849-1 are redundantly configured with regard to the internal logic as well as with regard to the output circuits. Figure 4-1 Single-channel sensor connection SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 34: Cross-Circuit Detection
3SK1 safety relays are only equipped with enabling circuits with NO functionality. This means that when the safety function is triggered, or a fault is detected, the enabling circuits will always transfer to the safe state (NO contact open). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 35: Signaling Circuit
Time-delayed shutdown of safety-related outputs in accordance with Stop category 1 is not ensured under all operating states. In the case of some internal device faults, and when disconnecting the supply voltage, these safety-related outputs are switched off instantaneously. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 36: Automatic Start
The "Manual start" function is only available with the 3SK1111 safety relays (slide switch at Autostart position). Note Manual start is not permitted for EMERGENCY STOP devices. Figure 4-3 Start function "Manual start" SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 37: Monitored Start
Out = flashing yellow; IN = off) Note In the delivery state of the 3SK1 safety relays, the start type is set to "Monitored start". Figure 4-4 Start function "Monitored start" SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 38: Two-Hand Operation/Synchronism
The 3SK1 Advanced safety relays exclusively support two-hand control units with two NO contacts. Note The two-hand circuit must be marked in compliance with EN 574. You can find information on determining the response time in the section entitled Response times (Page 194). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 39: Cascading
Unauthorized manipulation of the protection equipment can also be detected through startup testing. The plant operator decides whether startup testing should be performed (risk assessment). No general statements apply. Note In the delivery state of 3SK1 safety relays, startup testing is deactivated. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 40: Connection Of Actuators
Actuator wiring up to PL c / Cat. 2 in accordance with ISO 13849-1 or SILCL 1 in accordance with IEC 62061 Figure 4-5 PL c / Cat. 2 in accordance with ISO 13849-1 or SILCL 1 in accordance with IEC 62061 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 41 (FW) version V1.0.0 and product version E01) it is not possible to achieve PL d/e/Cat. 3/4 in accordance with ISO 13849-1 or SILCL 2/3 in accordance with IEC 62061 with the wiring shown above. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 42 PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061 Refer to the information on the function test interval in section General safety notes (Page 15). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 43 ISO 13849-1 or SILCL 2/3 in accordance with IEC 62061 with the wiring shown above. More detailed technical information is available in the "SIRIUS 3RM1 motor starters (http://support.automation.siemens.com/WW/view/en/66295730)" manual on the Internet. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 44: Series Connection Of Sensors
PL e (Cat. 4) in accordance with ISO 13849-1), because it is assumed that only one EMERGENCY STOP is operated at a time. This ensures that errors and defects can be detected. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 45: Use Of Magnetically Operated Switches
(e.g. also cable capacitances). A corresponding fuse protection with the rated current of the magnetically operated switch must be provided if the device/sensor combinations have not been explicitly enabled. For more details, please refer to the documentation of the magnetically operated switch. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 46 Safety systems - General information 4.3 Basic terminology SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 47: 3Sk1 Devices
IEC 62061, SIL 3 in accordance with IEC 61508 and PL e (Cat. 4) in accordance with ISO 13849-1. The safety relays comply with DIN EN 50156-1:2004 (Electrical equipment for furnaces). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 48: 3Sk1111 Standard Basic Unit Instantaneous (With Relay Outputs)
The safety relay has three safety-related outputs as NO circuits and one semiconductor signaling circuit (non-safety-related circuit, NC contact). On the front of the device there is a slide switch for function setting and two LEDs for displaying the operating states. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 49: Design
① Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ Slide switch ⑤ Bottom cover flap ⑥ Bottom cover flap; internal inscription ⑦ DataMatrix code ⑧ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 50: Terminal Assignment
23 - 24 33 - 34 41 - 42 Relay signaling circuits (NC contacts) Floating: Sensors T1/IN1 and T2/IN2 Jumper T3/IN3 Non-floating Sensors IN1 and IN3 Jumper T2/IN2 For 24 V AC/DC variant only SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 51: Inputs
Use of magnetically operated switches (Page 45). 5.1.3.6 Outputs The safety relay has the following outputs: ● Safety-related outputs (relays), NO contacts: 13/14, 23/24, 33/34 ● Non-safety-related outputs (semiconductor signaling circuit; relays), NC contacts: 41/42 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 52: Display Of The Operating State
Cross-circuit or no power supply Open 5.1.3.8 Function setting Setting the functions Slide switch Start AUTO Autostart MONITORED Monitored start In the delivery state, the slide switch is at the bottom (monitored start). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 53 3SK1 devices 5.1 3SK1 standard State diagrams 3SK1111 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 54 3SK1 devices 5.1 3SK1 standard SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 55: 3Sk1112 Standard Basic Unit Instantaneous (With Semiconductor Outputs)
In continuous operation for PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061, the key safety values apply where the function test interval (state change of the outputs) ≤ 20 years. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 56: Function Description
All internal safety-critical parts of the circuit are cyclically monitored for faults during operation. The semiconductor outputs cyclically run through a light/dark test for up to 2.5 ms (dynamically) to verify their correct functioning. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 57: Design
Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ DIP switch ⑤ SET/RESET button ⑥ Bottom cover flap ⑦ Bottom cover flap; internal inscription ⑧ DataMatrix code ⑨ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 58: Terminal Assignment
IN2 are supplied via an external + 24 V DC current source from which the device is also supplied. ● If the unit is parameterized to 2 x 1-channel with DIP switch 3, the sensor circuit that is not used (T1/IN1 or T2/IN2) must be bypassed. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 59: Outputs
● (4) SF The four LEDs show the following: ● Operating mode: Diagnostics ● Configuration mode: DIP setting For an explanation of the operating state display, see Section Display and diagnostics (Page 199) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 60: Function Setting
=> The device restarts without the supply "DEVICE" LED flashing green yellow voltage having to be switched off "SF" LED red Note The SET/RESET pushbutton only triggers a reset for the device on which the button is pressed. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 61 3SK1 devices 5.1 3SK1 standard State diagrams 3SK1112 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 62: 3Sk1 Advanced
The safety relays comply with DIN EN 50156-1:2004 (Electrical equipment for furnaces). You can use the 3SK1 safety relays Advanced to achieve two-hand switching applications up to type IIIc in compliance with EN 574:1996+A1:2008. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 63: General Device Features
● (4) SF The four LEDs show the following: ● Operating mode: Diagnostics ● Configuration mode: DIP setting For an explanation of the operating state display, see Section Display and diagnostics (Page 199) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 64: Functions
=> The device restarts without the "DEVICE" LED flashing green yellow supply voltage having to be switched "SF" LED red Note The SET/RESET pushbutton only triggers a reset for the device on which the button is pressed. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 65: 3Sk1121 Advanced Basic Unit Instantaneous (With Relay Outputs)
(T1/IN1 or T2/IN2) must be bypassed. 5.2.6 3SK1121 Advanced basic unit instantaneous (with relay outputs) 5.2.6.1 Device features Article number (MLFB): 3SK1121-xAB40 24 V DC (x) 1 = screw-type terminal; 2 = push-in terminal SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 66: Function Description
Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ DIP switch ⑤ SET/RESET button ⑥ Bottom cover flap ⑦ Bottom cover flap; internal inscription ⑧ DataMatrix code ⑨ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 67: Terminal Assignment
Test output 2 (for IN2, INF) 13 - 14 Safety-related outputs (NO contact, relay contact) 23 - 24 33 - 34 41 - 42 Semiconductor signaling circuits (NC contact, relay contact) State diagram 3SK1121 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 68: 3Sk1121 Advanced Basic Unit Time-Delayed (With Relay Outputs)
(y) time delay 1 = 0.05 ... 3 s; 2 = 0.5 ... 30 s; 4 = 5 ... 300 s Additional / alternative device characteristics ● 2 instantaneous safety-related outputs (NO contacts) ● 2 time-delayed safety-related outputs (NO contacts), ● Potentiometer for setting the delay time ● Time function: With OFF-delay SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 69: Design
③ Display LEDs ④ Potentiometer for setting the delay time ⑤ DIP switch ⑥ SET/RESET button ⑦ Bottom cover flap ⑧ Bottom cover flap; internal inscription ⑨ DataMatrix code ⑩ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 70: Terminal Assignment
Instantaneous safety-related output 2 (NO contact, relay contact) 37 - 38 Delayed safety-related output 1 (NO contact, relay contact) 47 - 48 Delayed safety-related output 2 (NO contact, relay contact) State diagrams 3SK1121-xCB4y SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 71 3SK1 devices 5.2 3SK1 Advanced SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 72: 3Sk1122 Advanced Basic Unit Instantaneous (With Semiconductor Outputs)
In continuous operation for PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061, the key safety values apply where the function test interval (state change of the outputs) ≤ 20 years. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 73: Design
Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ DIP switch ⑤ SET/RESET button ⑥ Bottom cover flap ⑦ Bottom cover flap; internal inscription ⑧ DataMatrix code ⑨ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 74: Terminal Assignment
Safety-related output 2 (switching to P potential, 24 V DC) Safety-related output 3 (switching to P potential, 24 V DC) Semiconductor signaling circuit 1 (switching to P potential, 24 V DC) State diagrams 3SK1122-xAB40 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 75 3SK1 devices 5.2 3SK1 Advanced SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 76: 3Sk1122 Advanced Basic Unit Time-Delayed (With Semiconductor Outputs)
In continuous operation for PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061, the key safety values apply where the function test interval (state change of the outputs) ≤ 20 years. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 77: Design
③ Display LEDs ④ Potentiometer for setting the delay time ⑤ DIP switch ⑥ SET/RESET button ⑦ Bottom cover flap ⑧ Bottom cover flap; internal inscription ⑨ DataMatrix code ⑩ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 78: Terminal Assignment
Instantaneous safety-related output 2 (switching to P potential, 24 V DC) Time-delayed safety-related output 1 (switching to P potential, 24 V DC) Time-delayed safety-related output 2 (switching to P potential, 24 V DC) State diagrams 3SK1122-xCB4y SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 79 3SK1 devices 5.2 3SK1 Advanced SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 80: 3Sk1120 Advanced Basic Unit Instantaneous (With Semiconductor Outputs)
In continuous operation for PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061, the key safety values apply where the function test interval (state change of the outputs) ≤ 20 years. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 81: Design
Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ DIP switch ⑤ SET/RESET button ⑥ Bottom cover flap ⑦ Bottom cover flap; internal inscription ⑧ DataMatrix code ⑨ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 82: Terminal Assignment
START pushbutton circuit Feedback circuit Cascading circuit Test output 1 (for IN1, PAR) Test output 2 (for IN2, INF) Safety-related output 1 (switching to P potential, 24 V DC) 5.2.10.4 Status diagrams State diagrams 3SK1120-xAB40 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 83 3SK1 devices 5.2 3SK1 Advanced SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 84: 3Sk1 Output Expansions
If you require Stop category 1 outputs for the output expansion, terminals A1/A2 of the output expansion must be connected to outputs 38 or 48 on 3SK1 basic units with relay outputs or to Q1t/Q2t (in the case of 3SK1 with semiconductor outputs). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 85: Function Description
Slide switch Interface input Outputs switch with time delay (as in basic unit) Bottom Outputs switch instantaneously When using an instantaneous basic unit, the slide switch must be in the instantaneous position (bottom). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 86: Output Expansion 3Sk1211
● 1 NC circuit as feedback contact for the 3SK1211 output expansion to the upstream basic unit ● 3ZY12* device connectors ● Enclosure width 22.5 mm ● Removable terminals * For 24 V DC variant only SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 87: Design Of 3Sk1211-.B..0
Design of 3SK1211-.B..0 ① Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ Bottom cover flap ⑤ Bottom cover flap; internal inscription ⑥ DataMatrix code ⑦ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 88: Design Of 3Sk1211-.Bb40
① Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ Slide switch ⑤ Bottom cover flap ⑥ Bottom cover flap; internal inscription ⑦ DataMatrix code ⑧ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 89: Terminal Assignment
● 1 NC circuit as feedback contact for the 3SK1213 output expansion for the upstream basic unit ● 3ZY12* device connectors ● Enclosure width 90 mm ● Removable terminals * For 24 V DC variant only SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 90: Design Of 3Sk1213-.Ab40
5.3.6.2 Design of 3SK1213-.AB40 ① Top cover flap ② Display LEDs ③ Slide switch ④ DataMatrix code ⑤ Bottom cover flap ⑥ Device identification label ⑦ Screw-type terminals ⑧ Spring-loaded terminals SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 91: Design Of 3Sk1213-.A.20
Safety-related output 1 (NO contact, relay contact) 23 - 24 Safety-related output 2 (NO contact, relay contact) 33 - 34 Safety-related output 3 (NO contact, relay contact) 41 - 42 NC circuit as feedback contact (NC, relay contact) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 92: 3Rm1 Failsafe Motor Starters
3SK1 basic unit. More detailed technical information is available in the SIRIUS 3RM1 motor starters (http://support.automation.siemens.com/WW/view/en/66295730) manual on the Internet. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 93: 3Sk1 Input Expansions
The input expansion 3SK1220 is certified to SIL 3/PL e. The SILCL/PL achieved by the overall system depends on the external connection of sensors and actuators. The input expansion 3SK1220 is supplied via the 3ZY12 device connectors. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 94: Design
Device identification label 5.4.1.4 Terminal assignment Terminal Explanation Sensor channel 1 Sensor channel 2 NO contact/NC contact evaluation ON button circuit Test output 1 (for IN1, PAR) Test output 2 (for IN2, INF) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 95: Display Of The Operating State
You can find additional information on this under "Advanced" in the Chapter Function description (Page 63). 5.4.1.6 Function setting DIP switch settings You can find additional information on this under "Advanced" in the Chapter Functions (Page 64). State diagrams 3SK1220 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 96 3SK1 devices 5.4 3SK1 input expansions SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 97: Power Supply 3Sk1230
The "INS" START pushbutton input of the 3SK1 device series must be supplied from the 3SK1230 power supply. NOTICE Two power supplies in parallel are not permissible! Only one 3SK1230 power supply is permitted in each system configuration. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 98: Design
5.4 3SK1 input expansions 5.4.2.3 Design ① Top cover flap ② Top cover flap; internal inscription ③ Display LEDs ④ Bottom cover flap ⑤ Bottom cover flap; internal inscription ⑥ DataMatrix code ⑦ Device identification label SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 99: Terminal Assignment
Display of the operating state The operating state and functioning of the device are indicated by an LED: ● (1) DEVICE Operating states State Meaning DEVICE Green Output voltage OK Flashing Overload No voltage SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 100 3SK1 devices 5.4 3SK1 input expansions SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 101: System Configuration
3SK1 basic unit. Information about start response in the system configuration of 3SK1 Advanced units can be found in the chapter "Explanations of device function (Page 190)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 102: Maximum System Configuration
The safety function is not guaranteed when more than one basic unit is used. Connection of 24 V DC to the basic unit: up to 5 expansions are permitted to the left of the basic unit and 5 expansions are permitted on the right. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 103 With this configuration too, up to 5 expansions are permitted to the left of the basic unit and 5 expansions are permitted on the right. Device System unit 3SK1220 input expansion 3SK1230 power supply 3SK112 basic units 3SK1211 output expansion 3SK1213 output expansion 3RM1 Failsafe motor starters SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 104 1 x 3SK1230 power supply; 5 x 3SK1220 input expansion; 1 x 3SK112 basic unit; 2 x 3SK1211 output expansion Example 2) 1 x 3SK1230 power supply; 5 x 3SK1220 input expansion; 1 x 3SK112 basic unit; 1 x 3RM1 Failsafe motor starter SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 105 System configuration 6.1 General information Example 3) 1 x 3SK1230 power supply; 2 x 3SK1220 input expansion; 1 x 3SK112 basic unit; 2 x 3RM1 Failsafe motor starter SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 106: 3Zy12 Device Connector
Device termination connector set for 3SK1 safety relay, > 45 mm wide (set consists of 3ZY1212-2FA00 device connector and 3ZY1210-2AA00 device connector) 3ZY1212-2AB00 Device connector for looping through signals, 22.5 mm wide 3ZY1210-2AA00 Device connector without a function, 22.5 mm wide SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 107 22.5 mm 22.5 mm 3ZY1212-1BA00 3ZY1212-2BA00 3ZY1212-2DA00 3SK1 Advanced basic units 3SK1121 3SK1122 3SK1120 Output expansions 3SK1 3SK1211 (4RO) 3SK1213 (3RO) Input expansions 3SK1 3SK1220 3SK1230 power supply 3RM1 Failsafe motor starters 3RM1 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 108: Applications
(connecting plugs) without any additional wiring outlay. When configuring the system, it is important to ensure that input expansions are connected on the left and output expansions/3RM1 Failsafe motor starters on the right of a basic unit. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 109: System Configuration Rules
If a purely instantaneous 3SK112 basic unit is used, the slide switch MUST be set to the "UNDELAYED" position. ● In the case of a change to the device configuration during operation, error mode is activated immediately. Restarting must be triggered via Power OFF/ON. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 110 3SK1 basic unit. You will find further information on the configuration guidelines for 3RM1 Failsafe motor starters in the SIRIUS 3RM1 motor starters (http://support.automation.siemens.com/WW/view/en/66295730) manual, in the section entitled "Load feeders - protection against short circuit". SIRIUS 3SK1 safety relays...
Page 111 ● It is only permitted to connect a voltage of 24 V DC to the terminals on the basic unit. ● It is not permitted to supply 24 V DC to an expansion component or 3RM1 Failsafe motor starter. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 112 System configuration 6.3 System configuration rules SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 113: Circuit Diagrams
Circuit diagrams Internal circuit diagrams 7.1.1 Internal circuit diagrams for 3SK1 Standard basic units Basic unit 3SK1111-.AB30 Standard relay instantaneous (24 V) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 114 Circuit diagrams 7.1 Internal circuit diagrams Basic unit 3SK1111-.AW20 Standard relay instantaneous (110 - 240 V) Basic unit 3SK1112-.BB40 Standard instantaneous SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 115: Internal Circuit Diagrams For 3Sk1 Advanced Basic Units
Circuit diagrams 7.1 Internal circuit diagrams 7.1.2 Internal circuit diagrams for 3SK1 Advanced basic units Basic unit 3SK1121-.AB40 Advanced relay instantaneous Basic unit 3SK1121-.CB4. Advanced relay time-delayed SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 116 Circuit diagrams 7.1 Internal circuit diagrams Basic unit 3SK1122-.AB40 Advanced solid-state instantaneous Basic unit 3SK1122-.CB4. Advanced solid-state time-delayed SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 117: Internal Circuit Diagrams For Expansion Units
Circuit diagrams 7.1 Internal circuit diagrams Basic unit 3SK1120-.AB40 Advanced 17.5 mm solid-state instantaneous 7.1.3 Internal circuit diagrams for expansion units 3SK1211 output expansion (110 - 240 V) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 118 Circuit diagrams 7.1 Internal circuit diagrams 3SK1211 output expansion (24 V DC) 3SK1213-.A.20 output expansion (110 - 240 V) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 119 Circuit diagrams 7.1 Internal circuit diagrams 3SK1213-.AB40 output expansion (24 V DC) 3SK1220 input expansion SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 120 Circuit diagrams 7.1 Internal circuit diagrams 3SK1230 power supply SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 121: Typical Circuits
Sensor: 1 NC contact • Slide switch Auto Monitored — bottom Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 * For 3SK1111-.AB30 basic unit only SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 122 Sensor: 1 NC contact • Slide switch Auto Monitored — Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 * For 3SK1111-.AB30 basic unit only SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 123 Up to Safety Integrity Level (SILCL) to IEC 62061 * For 3SK1111-.AB30 basic unit only When connecting magnetically operated switches as sensors, observe the information in chapter Use of magnetically operated switches (Page 45). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 124 Without cross-circuit detection • Sensor: 2-channel non-floating • 3SK1111-.AB30 Standard relay • Slide switch Auto Monitored — Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 125 Sensor: 2 NC contacts • 3SK1112 Standard solid-state and • 3SK112/3SK122 Advanced DIP switch — left right right Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 126 Sensor: 2-channel non-floating • 3SK1112 Standard solid-state and • 3SK112/3SK122 Advanced DIP switch — right left right Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 127 Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 Note Single-channel connection If only one single-channel sensor is used, the other sensor circuit must be jumpered. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 128 Up to PL in accordance with ISO 13849-1 Up to Safety Integrity Level (SILCL) to IEC 62061 Also possible: 2 x single-channel with T1-IN1, T2-IN2 and DIP switch 2 cross-circuit detection to ON. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 129 • Jumper T1/PAR for NC/NO evaluation • Sensor: NC/NO sensor • 3SK112/3SK122 Advanced • DIP switch — left right right PL in accordance with ISO 13849-1 Safety Integrity Level (SILCL) to IEC 61508 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 130 Safety Integrity Level (SILCL) to IEC 61508 You can find further information on two-hand operation in chapter Two-hand operation/synchronism (Page 38). Further information: ● SIRIUS Safety Integrated application manual (https://support.industry.siemens.com/cs/ww/en/view/81366718) ● FAQs on 3SK1 (https://support.industry.siemens.com/cs/ww/en/ps/16382/faq) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 131: Typical Circuits Of 3Sk1 Safety Relays With 3Rm1 Failsafe Motor Starters
3RM1 Failsafe motor starters is established via the device connectors. To prevent bypassing of the safety function, do not connect anything to terminals A1 and A2 of the Failsafe 3RM1 motor starters in this case. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 132 7.3 Typical circuits of 3SK1 safety relays with 3RM1 Failsafe motor starters If there is a common reference potential for the two inputs, it suffices to establish a ground connection. If there are separate potentials or controls, both connections must be assigned. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 133: 3Sk1 Safety Relay Wired With 3Rm1 Failsafe Motor Starter
To achieve SILCL 3/PL e/Cat. 4 for the safety-related application, all components of the safety functions (detecting/evaluating/reacting) must be designed accordingly. Note A fuse must be fitted as short-circuit protection (4 A gL/gG) in the supply line to the supply voltage of 3RM1 (L1). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 134 Circuit diagrams 7.3 Typical circuits of 3SK1 safety relays with 3RM1 Failsafe motor starters Figure 7-1 3SK1 safety relay with 3RM13 reversing starter SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 135: Additional Applications
Circuit diagrams 7.4 Additional applications Additional applications You can find additional applications in the SIRIUS Safety Integrated application manual on the internet (https://support.industry.siemens.com/cs/document/83150405?lc=en-WW). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 136 Circuit diagrams 7.4 Additional applications SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 137: Mounting
Terminal coding You can provide the terminals with coding pins (3ZY1440-1AA00). This helps you to avoid errors when replacing the terminals. Figure 8-1 Module with coding pins SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 138: Mounting The Devices On A Level Surface
● Two screws (17.5 mm or 22.5 mm devices)/or four screws (90 mm devices) to fit the holes M4 x 12 in accordance with DIN 784. ● Two plastic push-in lugs. Refer to the accessories list for the relevant article number in the chapter "Accessories (Page 223)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 139 Insert the screws through the elongated holes into the push-in lugs. Screw the device onto the level surface so that it is secure. Tightening torque: 1 Nm 17.5 mm and 22.5 mm devices 90 mm device SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 140: Disassembling Devices From A Level Surface
WARNING Hazardous Voltage Can Cause Death, Serious Injury, or Property Damage. Before starting work, therefore, disconnect the system and devices from the power supply. Requirements ● The terminals have been removed or disconnected. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 141 Hold the device firmly. Unscrew the cap screws. Lift the device from the level surface. Remove the push-in lugs from the device. Disassembling 17.5 mm and 22.5 mm devices Disassembling 90 mm devices SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 142: Mounting 22.5 Mm/17.5 Mm Devices On A Standard Mounting Rail
Step Instructions Figure Place the back of the device onto the upper edge of the standard mounting rail. Press the lower half of the device against the DIN rail until the device engages. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 143: Mounting The 90 Mm Devices On A Standard Mounting Rail
Step Instructions Figure Place the back of the device onto the upper edge of the standard mounting rail. Press the lower half of the device against the DIN rail until the device engages. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 144: Removing Devices From A Standard Mounting Rail
Procedure Step Instructions Figure Press the device downwards. Pull the lower half of the device away from the standard mounting rail. Lift the device from the upper edge of the standard mounting rail. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 145: Mounting 22.5 Mm/17.5 Mm Devices With Device Connectors On A Standard Mounting Rail
● Please observe the information about the mounting position in the chapter "General technical data (Page 203)". ● Device connectors: Refer to the accessories list for the relevant article number in the chapter "Accessories (Page 223)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 146 Push the device connectors together until they engage. Mount the cover on the left of the first device connector. The cover is included in the scope of supply of the device terminator. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 147 1 (top; i.e. closed) motor starters) Mount the device on the device connector. Mount all the devices required for the system configuration in accordance with the respective installation guidelines on the device connectors. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 148: Removing 22.5 Mm/17.5 Mm Devices With Device Connectors From A Standard Mounting Rail
WARNING Hazardous Voltage Can Cause Death, Serious Injury, or Property Damage. Before starting work, therefore, disconnect the system and devices from the power supply. Requirements ● The terminals have been removed or disconnected. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 149 Figure Unlock the device using a screwdriver. Pull the lower half of the device away from the device connector. Unlock the device using a screwdriver. Pull the device away from the device connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 150 Remove the cover. Press the device connector down. Pull the lower half of the device connector away from the standard mounting rail. Lift the device connector from the upper edge of the standard mounting rail. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 151: Mounting 90 Mm Devices With Device Connectors On A Standard Mounting Rail
● Use the device termination connector set for 3SK1 safety relays, > 45 mm wide. Refer to the accessories list for the relevant article number in the chapter "Accessories (Page 223)". ● Please observe the obligatory mounting rules in Section: "System configuration rules (Page 109)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 152 Push the device connectors together until they engage. Mount the cover on the left of the first device connector piece and the device connectors supplied in the set for enclosures of 45 mm upwards (right- hand side). SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 153 Mounting 8.10 Mounting 90 mm devices with device connectors on a standard mounting rail Step Instructions Figure Note the clearances required for the 90 mm devices. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 154 8.10 Mounting 90 mm devices with device connectors on a standard mounting rail Step Instructions Figure Mount the 3SK1213 output expansion on the device connectors. Mount all the devices required for the system configuration in accordance with the respective installation guidelines on the device connectors. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 155: Removing 90 Mm Devices With Device Connectors From A Standard Mounting Rail
Figure Unlock the device using a screwdriver. Pull the lower half of the device away from the device connector. Unlock the device using a screwdriver. Pull the device away from the device connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 156 Disassemble the terminating section. Press the device connector down. Pull the lower half of the device connector away from the standard mounting rail. Lift the device connector from the upper edge of the standard mounting rail. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 157: Mounting 22.5 Mm/17.5 Mm Devices With Device Connectors On The Wall
● Two screws (per device connector) to fit the holes M4 x12 in accordance with DIN 784. ● Device connector Refer to the accessories list for the relevant article number in the chapter "Accessories (Page 223)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 158 3SK1 basic device • mounting position 2 (bottom; i.e. open) 3RM1 below 3SK1211 output expansion • Failsafe position 1 (top; i.e. closed) motor starters) SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 159 Top: < 0.1 Nm • Bottom: 1 Nm • Mount the device on the device connector. Mount all the devices required for the system configuration in accordance with the respective installation guidelines on the device connectors. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 160: Removing 22.5 Mm/17.5 Mm Devices With Device Connectors From The Wall
WARNING Hazardous Voltage Can Cause Death, Serious Injury, or Property Damage. Before starting work, therefore, disconnect the system and devices from the power supply. Requirements ● The terminals have been removed or disconnected. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 161 Unlock the device (below) using a screwdriver. Pull the lower half of the device away from the device connector. Unlock the device (above) using a screwdriver. Pull the device away from the device connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 162 Mounting 8.13 Removing 22.5 mm/17.5 mm devices with device connectors from the wall Step Instructions Figure Release the screws. Separate the device connectors. Remove the cover. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 163: Mounting 90 Mm Devices With Device Connectors On The Wall
● Two M4 x 12 screws in accordance with DIN 784 (per device connector) to fit the holes. ● Use the device termination connector set for 3SK1 safety relays, > 45 mm wide. Refer to the accessories list for the relevant article number in the chapter "Accessories (Page 223)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 164 Note the clearances required for the 90 mm devices. Mount the device connector supplied in the set for enclosures of 45 mm upwards (right-hand side). Tightening torques: Top: < 0.1 Nm • Bottom: 1 Nm • SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 165 Mount the 3SK1213 output expansion on the device connectors Mount all the devices required for the system configuration in accordance with the respective installation guidelines on the device connectors. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 166: Removing 90 Mm Devices With Device Connectors From Wall
Unlock the device (bottom) using a screwdriver. Pull the lower half of the device away from the device connector. Unlock the device (top) using a screwdriver. Pull the device away from the device connector. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 167 Mounting 8.15 Removing 90 mm devices with device connectors from wall Step Instructions Figure Release the screws. Separate the device connectors. Remove the cover. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 168: Mounting The Sealable Cover
As an alternative, Siemens also offers a sealable membrane (3TK2820-0AA00) for securing the safety relays. The sealable membrane is fixed to the front of the safety relay and secures the DIP switches and the buttons (and potentiometers) against unintentional readjustment.
Page 169: Connection
The inside faces of the terminal covers are labeled with the designations of the relevant terminals. The position of the label corresponds to the position of the respective terminal. Figure 9-1 Upper terminal cover SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 170: Connection Data For Terminals
Flexible conductor with end sleeve A = 10 mm 1 x 0.5 ... 2.5 mm² 2 x 0.5 ... 1.0 mm² Flexible cable Not permissible 1 x 20 to 14 2 x 18 to 16 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 171: Connecting The Screw-Type Terminals
WARNING Hazardous Voltage Can Cause Death, Serious Injury, or Property Damage. Before starting work, therefore, disconnect the system and devices from the power supply. Requirements ● Cross-tip screwdriver size PZ 1 x 80 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 172: Wiring Rules For Spring-Loaded Terminals (With Push-In Technology)
To make optimum use of available terminal area, you are advised to choose a form of crimping that creates a corresponding rectangular contour. Trapezoidal crimping is generally very highly suitable in this case. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 173: Connecting The Push-In Terminals
Requirements ● 0.5 x 3 mm screwdriver DIN 5264 (for finely-stranded conductors only). ● For suitable connection cross-sections of the cables, see the chapter "Connection data for terminals (Page 170)". SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 174 (oval opening). Insert the cable as far as it will go into the oval opening and remove the screwdriver. Pull on the cable to ensure it is tight. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 175: Disconnecting The Push-In Terminals
● Screwdriver DIN 5264 of the size 0.5 x 3 mm Procedure Step Instructions Figure Insert the screwdriver into the rectangular opening of the spring-loaded terminal until it engages. Remove the cable from the oval opening. Remove the screwdriver. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 176: Attaching The Terminals
You must have removed the terminals, for the purpose of replacing a device, for example. Procedure when plugging in the terminals Step Instructions Figure Insert the detachable terminals into the guide rail of the device. Slide the detachable terminals back until they audibly engage. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 177: Disconnecting
Removing terminals from the device Step Instructions Figure Press the clip of the terminals upwards. Pull the terminals out to the front. Lift the terminals out of the guide rail of the device. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 178 Insert the screwdriver into the rectangular opening of the push-in terminal until it engages. Please observe a 10° horizontal angular deviation of the screwdriver to the oval opening. Remove the cable from the oval opening. Remove the screwdriver. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 179: Devices 90 Mm
Positions of the terminals and opening the terminal cover Ther removable terminals are located under the lower terminal cover. ① ② To open the terminal cover, press on it in the middle and lift it up SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 180: Connection Data For Terminals
A = 10 mm 1 x 0.5 ... 1.5 mm² 2 x 0.5 ... 1.5 mm² 1 x 20 to 12 1 x 20 to 16 2 x 18 to 14 2 x 20 to 16 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 181: Connecting Terminals
Hold the cable in the screw-type terminal. Tighten the screw of the terminal in which the cable is inserted. Pull on the cable to ensure it is screwed tight. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 182 Insert the cable into the oval opening as far as it will go. Hold the cable in the spring-loaded terminal. Remove the screwdriver. Pull on the cable to ensure it is tight. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 183: Mounting Terminals
Insert the detachable terminals into the guide rail of the device. Slide the detachable terminals back until they audibly engage. Check that the clip of the removable terminals closes flush with the front panel. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 184: Disconnecting
Figure Insert a flat-head screwdriver between the clip of the terminals and the front panel. Pull the terminals out to the front. Lift the terminals out of the guide rail of the device. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 185 Please observe a 10° horizontal angular deviation of the screwdriver to the oval opening. Remove the cable from the oval opening. Remove the screwdriver. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 186: Device Replacement
– Chapter "Removing 22.5 mm/17.5 mm devices with device connectors from a standard mounting rail (Page 148)" – Chapter "Removing 90 mm devices with device connectors from a standard mounting rail (Page 155)" SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 187 5. Set the DIP switches/slide switches and, if applicable, the times according to the defective device. After applying the supply voltage, the new 3SK1 basic unit checks whether the hardware configuration matches the device configuration. If there are no deviations, the system re-enters safety mode. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 188 Connection 9.3 Device replacement SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 189: Configuration / Operation
Following a restart, the device remains in safety configuration mode during power up (all safety-related outputs are shut down) until the new delay time is accepted by pressing the SET/RESET button. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 190: Explanation Of The Device's Functions
It is expected that both sensors are ANDed. Simultaneity is not monitored. Startup testing After a power failure, startup testing requires that the sensors at IN1 and IN2 are actuated once by the system operator. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 191 Floating contact blocks must be connected between A1 / +24 V and INK . It is important to note that the start function of cascading input INK corresponds to the start function of sensor inputs IN1, IN2 . SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 192 If the voltage Us is disconnected on devices with time-delayed outputs between switching the instantaneous outputs and the time-delayed outputs, the delay time expires when the voltage Us is restored, and the time-delayed contacts change their switch positions. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 193: Modes
"DEVICE" LED show a green light. Error mode Error mode is indicated by a red "DEVICE" LED or by a red "SF" LED. In error mode, the device ALWAYS changes to the safe state. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 194: Response Times
If output expansions are used, the response times of the relevant output module are also added to the total time from the sensor to the actuator. Examples Example 1 3SK1121-.AB40 + 3SK1211.BB40 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 195 ● Basic unit = 3 x response time EE + response time GG = 160 ms ● 3SK1211 output expansion = total response time EE with GG + AE = 170 ms ● 3RM1 Failsafe = 160 ms + 3RM1 Failsafe motor starter response time SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 196 Configuration / operation 10.4 Response times SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 197: Commissioning
SET/RESET button. Note Observe the following during commissioning: The cascading input must be jumpered ( 24 V DC) if it is not to be used. Monitoring of the feedback circuits is not optional. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 198 Commissioning SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 199: Display And Diagnostics
With input expansion: missing enabling signal of input expansion Group error: Cross-circuit at input Configuration mode DIP (3) position: right Flickering yellow Configuration mode: Special two-hand operation configuration Flickering red Configuration mode: impermissible configuration SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 200: Power-Up
Configuration mode: impermissible configuration 2 x single-channel (4) SF Yellow or yellow flashing Startup testing off Startup testing ON 12.3 Error statuses Display Explanation (1) DEVICE Device error (4) SF Group error Red flashing Fault message SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 201: Diagnostics
ON position is at ON (right), the (right), the relevant LED relevant LED flashes yellow flashes yellow All DIP switches are at OFF (left) All LEDs light up briefly (yellow) at intervals SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 202 Flashing pressing the SET/RESET button) yellow System stop (restart possible by disconnecting and re- connecting the operating voltage) On time-delayed devices, the LED flashes green/yellow provided the time-delayed outputs are still switched on SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 203: Technical Data
Technical data 13.1 Data sheet You can find all the technical data of the product in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key.
Page 204 Comply with the instructions given for the respective device Type of electrical connection 3SK..-1..3SK...-2..screw connection push-in connection Maintenance The 3SK1 safety relays are maintenance-free Certificate of suitability Yes (except 3SK1230) TÜV approval • UL certification • CSA approval • SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 205 Ie (A) value Electrical endurance (operating cycles) of safety-related outputs (typical) AC-1 500000 85000 860000 140000 1300000 210000 AC-15 300000 50000 850000 85000 1100000 120000 DC-13 300000 50000 2000000 230000 7000000 1100000 DC-1 500000 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 206 2000000 480000 DC-1 500000 Device versions: 3SK1213-.AB40 3SK1213-.AJ20 3SK1213-.AL20 Utilization category Ue (V) Ie (A) value Electrical endurance (operating cycles) of safety-related outputs (typical) AC-1 1370000 1000000 AC-15: 1370000 1000000 DC-13 1370000 1000000 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 207 1.7 E 1.0 E 3SK1211-.BB00 1.7 E 1.0 E 3SK1211-.BW20 1.7 E 1.0 E 3SK1213-.AB40 1.0 E 1.0 E 3SK1213-.AJ20 1.0 E 1.0 E 3SK1213-.AL20 1.0 E 1.0 E 3SK1220-.AB40 1.0 E 7.0 E SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 208 Technical data 13.2 General technical data SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 209: Dimension Drawings
Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-1 Enclosure 17.5 mm for safety relays: 3SK1120-….. ; 3SK1220-….. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 210 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-2 Drilling diagram, enclosure 17.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 211 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-3 Enclosure 22.5 mm (short) for safety relays: 3SK1112-….. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 212 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-4 Enclosure 22.5 mm (long) for safety relays: 3SK1111-….. ; 3SK1121-….. ; 3SK1122-….. ; 3SK1211-….. ; 3SK1230-….. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 213 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-5 Drilling diagram, enclosure 22.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 214 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-6 3SK1 device on device connector Figure 14-7 Enclosure 90 mm for safety relays: 3SK1213-….. SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 215 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-8 Drilling diagram, enclosure 90 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 216 Dimension drawings 14.1 Dimension drawings for 3SK1 devices Figure 14-9 3SK1213 device on device connector SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 217: Dimension Drawings For 3Sk1 Device Connector
Dimension drawings 14.2 Dimension drawings for 3SK1 device connector 14.2 Dimension drawings for 3SK1 device connector Figure 14-10 Device connector for 3SK1 safety relays, width: 17.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 218 Dimension drawings 14.2 Dimension drawings for 3SK1 device connector Figure 14-11 Device connector for 3SK1 safety relays, width: 22.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 219 Dimension drawings 14.2 Dimension drawings for 3SK1 device connector Figure 14-12 Device termination connector for 3SK1 safety relays, width: 22.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 220 Dimension drawings 14.2 Dimension drawings for 3SK1 device connector Figure 14-13 Device connector for 3RM1 motor starters, width: 22.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 221 Dimension drawings 14.2 Dimension drawings for 3SK1 device connector Figure 14-14 Device termination connector for 3RM1 motor starters, width: 22.5 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 222 Dimension drawings 14.2 Dimension drawings for 3SK1 device connector Figure 14-15 Drilling plan for 17.5 mm and 22.5 mm device connectors SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 223: Accessories
17 sheets of 48 labels; size 10 x 7 mm SIRIUS device identification label 3RT2900-1SB20 17 sheets of 20 labels; size 20 x 7 mm SIRIUS device identification label 3RT2900-1SB60 10 sheets of 306 adhesive labels; size 19 x 6 mm SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 224 3SK1120 ✓ ✓ 3SK1121 ✓ ✓ 3SK1122 ✓ bottom ✓ top ✓ bottom ✓ top Output expansions 3SK1211 ✓ ✓ 3SK1213 Input expansions 3SK1220 ✓ top ✓ top 3SK1230 ✓ bottom ✓ bottom SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 225: Index
Index Data sheet, 203 Newsletter, 18 Operational safety, 18 Product data sheet, 203 Technical data, 203 SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...
Page 226 Index SIRIUS 3SK1 safety relays Manual, 06/2018, A5E02526190021A/RS-AD/004...

Siemens SIRIUS 3SK1 Manual

1 Introduction

2 Product-Specific Safety Information

3 Product Overview for 3SK1

4 Safety Systems - General Information

3 SK1 Devices

6 System Configuration

7 Circuit Diagrams

8 Mounting

9 Connection

10 Configuration / Operation

11 Commissioning

12 Display and Diagnostics

13 Technical Data

14 Dimension Drawings

15 Accessories

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