Pilz PSS1PS24 compact safety relay module

Product Detailed Description:

The Pilz PSS1PS24 is a compact safety relay module designed for the monitoring of emergency stop circuits and the control of two solenoid valves in applications requiring SIL 2 / PLe safety performance according to IEC 61508 and ISO 13849-1. It provides a robust and reliable solution for integrating safety functions directly into machinery control systems. The module features a fail-safe design, ensuring that the safety output is deactivated in the event of a fault (e.g., coil burnout, short circuit). It is commonly used in applications where the separation of the stop command (emergency stop button) from the start command is required, and where the control of two solenoid valves (often for valve blocks in pneumatic or hydraulic systems) is necessary for safe machine operation or shutdown. The PSS1PS24 helps machine builders meet stringent safety standards while simplifying the wiring and control logic for these specific safety functions.

Product Parameters:

• Performance Level (PL): PLe

• Safety Integrity Level (SIL): SIL 2 (according to IEC 61508)

• Function: Emergency stop monitoring, control of 2 solenoid valves

• Inputs:

• 1 Start input (Normally Open - NO, Normally Closed - NC, or Changeover - CO contact)

• 1 Stop input (NO, NC, or CO contact)

• Optional: 1 Additional monitoring input (NO or NC contact)

• Outputs:

• 2 Safety outputs for controlling solenoid valves (e.g., 2 x 230 V AC / 24 V DC, depending on version)

• Supply Voltage: Typically 24 V DC (check specific version)

• Failure Modes Monitored: Coil burnout, short circuit (on outputs), welded contacts (on inputs)

• Certifications: CE marking, UL/cUL listed (check specific version for details)

• Mounting: Panel mount

• Dimensions: Typically compact, DIN rail mountable (check datasheet for exact size)

• Environmental Ratings: Suitable for industrial environments (check datasheet for IP rating, operating temperature range)

Product Advantages:

• Simplified Wiring: Integrates multiple safety functions (stop monitoring, valve control) into a single module, reducing the number of components and wiring complexity compared to using discrete relays.

• Compact Design: Saves valuable space in control cabinets.

• High Reliability: Fail-safe design ensures safety functions are maintained or deactivated correctly in the event of component failure.

• Compliance: Helps users meet stringent international safety standards (IEC 61508, ISO 13849-1).

• Cost-Effective: Reduces the need for multiple individual safety relays and associated wiring, potentially lowering overall system cost.

• Clear Status Indication: Often includes LEDs for visual indication of module status, input states, and output states.

• Robust Construction: Designed for reliable operation in demanding industrial environments.

Precautions / Notes:

• Correct Wiring is Critical: Incorrect wiring of inputs or outputs can lead to unsafe machine operation. Always follow the manufacturer’s wiring diagrams precisely.

• Input Contact Type: Ensure the contact type (NO, NC, CO) of the connected safety devices (e.g., E-stop buttons, start buttons) matches the requirements specified for the PSS1PS24 inputs.

• Supply Voltage: Use the correct supply voltage as specified for the module version. Incorrect voltage can damage the module.

• Load Compatibility: Ensure the connected solenoid valves and other loads are compatible with the output ratings (voltage, current) of the PSS1PS24.

• Installation Environment: Install the module in a suitable environment, adhering to the specified temperature and humidity ranges. Protect from excessive vibration, dust, and moisture.

• Commissioning and Maintenance: Follow Pilz guidelines for commissioning, testing, and maintenance procedures to ensure continued safe operation.

• Documentation: Always refer to the official Pilz datasheet and application manual for the specific PSS1PS24 version being used.

• Professional Installation: Installation and configuration should be performed by qualified personnel familiar with machine safety standards and electrical control systems.

Product Applications:

The Pilz PSS1PS24 is commonly used in a wide range of machinery and equipment where safety functions involving emergency stops and the control of two actuators (typically via solenoid valves) are required. Typical applications include:

• Machine Tools: Controlling safety functions and actuator sequences on CNC machines, lathes, milling machines, etc.

• Packaging Machinery: Managing safety stops and valve actions in packaging lines, filling machines, and labeling equipment.

• Material Handling: Safety integration in conveyors, robotics, palletizers, and lift systems.

• Plastics and Rubber Industry: Controlling safety functions on injection molding machines, extruders, and other processing equipment.

• Woodworking Machinery: Implementing safety stops and valve controls on saws, routers, and CNC woodworking centers.

• Food and Beverage Processing: Ensuring safe operation in processing lines, bottling plants, and packaging systems.

• General Industrial Automation: Any application requiring SIL 2 / PLe certified emergency stop monitoring and the control of two solenoid-operated functions for safe machine behavior.

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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