General Device Features; Function Description - Siemens SIRIUS 3SK1 Manual

5.2.3

General device features

Device properties:
● 4-way DIP switch for function setting (parameterization)
● SET/RESET button
● 4 LEDs for status and function display
● 2 sensor inputs (channels 1 and 2)
● 1 input (cascading circuit)
● 1 input (START pushbutton circuit)
● NO contact/NC contact evaluation via external jumper
● Connection interface
● Removable terminals
5.2.4

Function description

On the front of the 3SK1 Advanced basic units, there is a 4-way DIP switch for function
setting and 4 LEDs for status and function display. A SET/RESET button can be used to load
function settings and to perform a device restart (reset). On commissioning, the devices runs
a self-test in which the internal electronics and firmware are checked for correct functioning.
All internal parts of the circuit are cyclically monitored for faults during operation. The
semiconductor outputs run through a dark test for up to 2 ms (dynamically) to verify their
correct function. The safety relays can be expanded using 3ZY device connectors with input
and output expansions.
Basic unit 3SK1 Advanced time-delayed only:
These basic units have two time-delayed and two instantaneous enabling circuits as NO
circuits or outputs switching to P potential.
Display of the operating state
Four LEDs and one DIP switch indicate the operating state and functioning of the device:
● (1) DEVICE
● (2) OUT
● (3) IN
● (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 187)
3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
3SK1 devices
5.2 3SK1 Advanced
57