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Hydropa DS6 Series Operating Instructions Manual

Safety pressure switch
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SAFETY PRESSURE SWITCH

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Summary of Contents for Hydropa DS6 Series

  • Page 1 SAFETY PRESSURE SWITCH...
  • Page 2 INTRODUCTION CONTENTS ADDITIONAL INFORMATION www.hydropa.de CONFIGURATION AND FUNCTION...
  • Page 3 TECHNICAL DATA 1 change-over contact, form C...
  • Page 4 ORDER INFORMATION...
  • Page 5 SAFETY CHARACTERISTICS Contact 1/2 Reliability parameter m switching cycles (for the individual microswitch) Actuation frequency 2.880 cycles / year...
  • Page 6 MTTF value (subsystem) 100 years (subsystem) 1,1 × 10 PL (subsystem) Contact 1/2 Contact 1/2...
  • Page 7 Reliability parameter 1.5 m switching cycles (for the individual microswitch) Diagnostic coverage DC 99% (cross comparison of the output signals (for the individual microswitch) in logics) Actuation frequency 2,880 cycles / year Symmetrized MTTF value 100 years Average diagnostic coverage 99 % (subsystem) 2,5 ×...
  • Page 8 HYDROPA HYDRAULISCHE ERZEUGNISSE GMBH & CIE. KG Därmannsbusch 4 - D-58456 Witten / Postfach 3165 - D-58422 Witten Telefon: +49 2302 70 12 0 - Telefax: +49 02302 70 12 47 E-Mail: info@hydropa.de - Internet: www.hydropa.de...
  • Page 9 Operating instructions Safety pressure switch series DS6...
  • Page 10 ® HYDROPA is a registered trademark of HYDROPA Hydraulische Erzeugnisse GmbH & Cie. KG. 2  33 Original operating instructions: DS6 / ENG 2019 / 01 Rev. 2.10...

  • Page 11: Table Of Contents

    Notes on the operating instructions Table of contents Notes on the operating instructions ....................5 Use of the operating instructions ......................5 Presentation and significance of the safety information ................ 5 Understanding presentation and significance of other information ............6 Terms and abbreviations ........................
  • Page 12 Notes on the operating instructions Order information ..........................21 Scope of supply and storage ......................22 Scope of supply ...........................22 Storage ..............................22 Installation and initial operation .......................23 Installation of the pressure switch ......................23 8.1.1 Mechanical attachment ........................23 8.1.2 Fluidic connection ..........................23 8.1.3 Electrical connection ..........................24 Setting the cut off pressure ........................25 8.2.1...

  • Page 13: Notes On The Operating Instructions

    Notes on the operating instructions Notes on the operating instructions Use of the operating instructions These operating instructions contain all the information required by the man- ufacturer of controls and / or machines to be able to integrate the safety pressure switches type DS6 into a control as intended.

  • Page 14: Understanding Presentation And Significance Of Other Information

    Notes on the operating instructions Understanding presentation and significance of other information Marking Significance Draws your attention to possible damage to property. Helps you learn about useful tips and recommendations, as well as information for efficient and trouble-free operation. Operating elements in these operating instructions are shown in CAPITAL LETTERS.

  • Page 15: Safety

    Permissible use, limitations of use The pressure switches of the DS6 series are safety components in accord- ance with Directive 2006/42/EC and are used to monitor fluid pressures. The pressure switches may only be operated in accordance with the technical data defined in these operating instructions;...

  • Page 16: Interface To Controls Or Machine Manufacturer

    Safety The pressure switches may only be operated in accordance with the technical data defined in these operating instructions; see chapter 5 Technical data. The pressure switches must not be modified or changed in any other way. Interface to controls or machine manufacturer 2.3.1 Requirement of the electrical equipment The pressure switches may only be operated with safety extra-low voltage...

  • Page 17: Who Is Allowed To Do What

    Activities other than those described in these operating instructions may only be carried out by authorized Hydropa staff. Persons whose reactivity is impaired, e.g. by drugs, alcohol or medication, must not carry out any work on the pressure switches.

  • Page 18: Residual Hazards And Protective Measures

    Safety Residual hazards and protective measures 2.5.1 Hazard caused by stored energy Before removing the pressure switches, the stored energy must be safely dissipated. 2.5.2 Hazard caused by extreme temperatures Due to the permissible maximum temperature of 80 deg. C, the housing of the pressure switch may be excessively hot.

  • Page 19: Configuration And Function

    Configurati on and function Configuration and function The pressure switch series DS6 is available for monitoring both decreasing and rising pressures. Thus, the monitoring of a minimum as well as a maxi- mum pressure is possible. The pressure switches operate according to the piston-spring principle. The hydraulic force resulting from the pressure of the medium acts on one side of the piston.

  • Page 20: Safety Characteristics

    Safety characteristics Safety characteristics The DS6 pressure switch series is available in a single-channel as well as a dual-channel version. In addition, the safety-related microswitches have positively actuated con- tacts in accordance with EN 60947, which enable positive opening of the contacts at a type-dependent pressure level.

  • Page 21: Calculation Example

    Safety characteristics and must be determined by the control unit and/or machine manufacturer within the framework of PL verification. For this purpose, the principles of EN ISO 13849-1 must be observed. 4.1.4 Calculation example The calculation was based on the following values: Reliability parameter B10 1,5 m switching cycles (for the individual microswitch)

  • Page 22: Performance Level (Pl) Of The Subsystems

    Safety characteristics 4.2.2 Performance Level (PL) of the subsystems Due to their architecture, subsystems consisting of only one pressure switch of this version can achieve, as rule, a maximum performance level of “d" ac- cording to DIN EN ISO 13849-1. The achievable performance level results from the symmetrized MTTF val- ue and the average diagnostic coverage DC...

  • Page 23: Forced Disconnection Version „S

    Safety characteristics Average diagnostic coverage DC 99 % 2,5 ⋅ 10 (subsystem) PL (subsystem) Forced disconnection Version „S“ In version "S", the pressure switches are designed in such a way that the safety-related contact pair of the microswitches is positively opened when the set pressure is exceeded by a corresponding positive opening differential pressure (see Table (1)).

  • Page 24: Forced Disconnection: Version „F

    Safety characteristics Forced disconnection: Version „F“ In version “F", the pressure switches are designed in such a way that the safety-related contact pair of the microswitches is positively opened when the set pressure is exceeded by a corresponding positive opening differential pressure (see Table (1)).

  • Page 25: Marking And Type Plate

    Safety characteristics Furthermore, this phenomenon can usually be expected only in the case of a very slow change in pressure. For example, when the pressure supply is switched off and the pressure in the fluid system drops very slowly due to minor leaks.

  • Page 26: Technical Data

    Technical data Technical data General characteristics Contact system, electrical symbol 1 change-over contact, form C Fluidic symbol Fluidic data Pressure range and max. permissible Pressure setting range operating pressure [bar] Setting Type [bar] Version: Version: 1 - 15 4 - 12 10 - 110 25 - 90 20 - 220...
  • Page 27 Technical data Environmental data Utilization category DC-13 Clearance and creepage distance Overvoltage category Degree of contamination 2 Ambient temperature range °C - 25 U + 80 Condensation in operation Impermissible Mechanical loads Type of mechanical load Severity level Peak acceleration Shock duration Single shock (EN 60068-2-27) 30 g...
  • Page 28 Technical data Safty principles The pressure switches fulfil the following component-related well-tried components safety principles according to EN ISO 13849-2: • basic safety principles according to tables A.1,B,1,C.1 and D.1 • basic safety principles according to tables A.2,B,2,C.2 and D.2 Furthermore the pressure switches are proven components according to EN ISO 13849-1 Max.

  • Page 29: Order Information

    Order information Order information Please use the following type code to determine the desired pressure switch type. also for pneumatic media for hydraulic media exclusively p. 21  33 Original operating instrucktions: DS6 / ENG...

  • Page 30: Scope Of Supply And Storage

    Scope of supply and storage Scope of supply and storage Scope of supply Complain about any defects immediately. Claims for damages can only be asserted within the applicable complaint periods. Check the delivery for completeness and transport damage immediately up- on receipt.

  • Page 31: Installation And Initial Operation

    Installation and initial operation Installation and initial operation During assembly, the greatest possible cleanliness must be ensured. Contamination introduced during installation can lead to malfunctions and impair the safe functioning of the pressure switches. Do not mount pressure switches that are damaged. Compare the permissible technical data of your pressure switch with the technical data of your application.

  • Page 32: Electrical Connection

    Installation and initial operation Connection of the screw connection with the pipe system of the fluid system. 8.1.3 Electrical connection The electrical connection must be carried out by a qualified electrician in accordance with the applicable safety and accident prevention regulations. Relevant installation and operating regulations (e.g.

  • Page 33: Setting The Cut Off Pressure

    Installation and initial operation Setting the cut off pressure Before initial commissioning, check that the pressure switch has been correctly installed. The pressure switch may only be operated by qualified staff who have read and understood these operating instructions. The pressure switch may only be operated in accordance with the specified operating and operating conditions.

  • Page 34: Setting Of Cut-Off Pressure; Version "F

    Installation and initial operation 8.2.3 Setting of cut-off pressure; Version "F" The following steps are required to set the cut-off pressure in version "F": Loosen the lock washer using a hexagon socket wrench (6 mm). Set the system pressure to a significantly higher value than the de- sired cut-off pressure, but maximum up to the maximum permissible operating pressure of the pressure switch.

  • Page 35: Operation

    Operation Operation Observe the safety instructions as rendered in chapter 2.5.2 Danger from extreme temperatures. No staff activities are required during operation. p. 27  33 Original operating instrucktions: DS6 / ENG...

  • Page 36: Maintenance And Repair

    Only carry out activities that are described in this chapter. Activities not described in this chapter may only be carried out by Hydropa staff. Before each recommissioning the pressure switch, make sure that they are set properly (see chapter 7.2).

  • Page 37: Inspection And Maintenance Activities

    Maintenan ce and repair 10.4 Inspection and maintenance activities 10.4.1 Leak check To avoid personal injury and component damage, a leakage test must be carried out every 3 months. If compressed air is used as pressure medium, leakage spray may have to be used to detect leaks. As part of this test, the following points on the pressure switch shall be checked for signs of leak- age: Connection “pressure media supply”...

  • Page 38: Failures Of Function And Troubleshooting

    Maintenance and repair must be checked. Relevant types of pressure switch: Type Version 1. Manual pressure switch inspection: Version "S" Connect a suitable voltage source to terminal "S1", which can be used to detect the interruption of the voltage supply by the break contact of the microswitch.

  • Page 39: Safety Relevant Failures And Troubleshooting

    Maintenan ce and repair 10.6 Safety relevant failures and troubleshooting Fault detection / remedial Failure Potential cause action Version 2K: The contact Increase the discrepancy time The actuating speed of the of one microswitch only between the two microswitch pressure piston is too low is opened signals Use a measuring instrument...

  • Page 40: Disassembly

    Disassembly Disassembly Hazard caused by stored energy and extreme temperatures See chapter 2.5 Residual hazards and protective measures. 1. Separating the fluid energy supply. Reduce stored energy in the fluid system and check that it is free of pressure. 2. Disconnect the electrical power supply by disconnecting the M12 cable plug.

  • Page 41: Disposal

    Därmannsbusch 4, D-58456 Witten (Herbede) Postfach 31 65, D-58422 Witten (Herbede) Phone (0 23 02) 70 12-0 Fax (0 23 02) 70 12-47 Internet: www.hydropa.de E-Mail: info@hydropa.de p. 33  33 Original operating instrucktions: DS6 / ENG...

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