Pilz PSEN cs1.1P 540050 RFID Safety Switch (PSENcode)

The Pilz PSEN cs1.1P (order number 540050) is a non-contact safety switch belonging to the PSENcode family. It operates using RFID (radio frequency identification) transponder technology to monitor the position of movable guards, such as safety doors or covers. The switch provides two safe semiconductor outputs (OSSDs) and is designed for applications requiring high tamper resistance and coding according to ISO 14119. The PSEN cs1.1P is compatible with any PSENcode actuator and can be used in series connection to simplify wiring for multiple guard doors.

Technical Specifications

• Order Number: 540050

• Product Type: RFID safety switch (sensor only, actuator sold separately)

• Supply Voltage: 24V DC (nominal)

• Power Consumption: 2W typical

• Outputs: 2 OSSD safety outputs (semiconductor, short circuit proof)

• Signal Output: 1 auxiliary (non‑safe) semiconductor output

• Actuation Directions: 4 (allowing flexible mounting)

• Operating Distance (Sao): Assured 15 mm

• Release Distance (Sar): Typical 40 mm

• Switching Distance: 21 mm typical

• Connection: M12, 8‑pin male connector

• Protection Rating: IP67

• Housing Material: PBT (upper part)

• Dimensions (W × H × D): 40 mm × 75 mm × 40 mm

• Operating Temperature: -25°C to +70°C

• Storage Temperature: -40°C to +85°C

• Humidity Rating: 93% r.h. at 40°C

• Shock Resistance: 30g (acceleration)

• Coding Level: Low (according to ISO 14119)

Functional Description

The PSEN cs1.1P uses contactless RFID technology to detect when a coded actuator is within its sensing range. The actuator (sold separately, type PSEN cs1.1) is mounted on the movable guard. When the guard is closed and the actuator is in position, the switch reads the unique transponder code and enables the two OSSD outputs. If the guard is opened, the outputs are turned off within a few milliseconds. The switch monitors its own electronics and the actuator distance continuously, providing a high level of diagnostic coverage. The auxiliary output can be used to signal “guard closed” to a PLC for status indication.

Safety Compliance

The PSEN cs1.1P is certified according to EN 60947-5-3 (requirements for non-contact position sensors) and can be used in safety circuits up to Category 4 / PL e (ISO 13849-1) and SIL 3 (IEC 61508) when monitored by a suitable safety controller or safety relay. The switch supports series connection (SDD), allowing multiple PSENcode switches to be connected in a chain while maintaining SIL 3 performance.

Mounting and Installation

The switch can be flush‑mounted into metal or plastic panels (follow installation guide for material influence on sensing distance). It accepts actuation from all four directions, giving flexibility in hinge or sliding door designs. The M12 connector (8‑pin) is standard, and the switch is supplied without an actuator. For correct operation, the actuator must be ordered separately (model PSEN cs1.1). The operating distance variation with temperature is ±0.01 mm/°C.

Diagnostic Capabilities

A built‑in LED on the switch provides local status indication: green = guard closed and outputs active, red = guard open or fault, flashing = teaching mode. The switch also reports diagnostic data over the auxiliary output and can be read by a safety PLC via the OSSD lines using pulse testing techniques. No teaching is required for standard operation; the switch is pre‑configured to accept any actuator from the PSEN cs1.1 family.

Applications

Typical applications include safety door monitoring on packaging machines, access gates on robotic cells, cover monitoring on conveyor systems, and position detection on movable machine parts. The IP67 rating makes it suitable for food processing and outdoor installations.

Conclusion

The Pilz PSEN cs1.1P 540050 RFID safety switch combines non‑contact operation, high immunity to manipulation, and flexible mounting, offering a reliable solution for guard monitoring applications up to the highest safety levels.