The Pilz 750103 is a PNOZ s3 24VDC 2 n/o standalone safety relay from the PNOZsigma product range, designed for monitoring safety circuits such as E-STOP pushbuttons, safety gates, and light barriers. It is recognized for its high functionality, compact design, and reliability in industrial automation environments.

Key Features

• Operating Modes: Configurable via rotary switches, allowing for single or dual-channel operation.
• Safety Outputs: 2 instantaneous safety contacts (N/O - Normally Open).
• Auxiliary Outputs: 1 semiconductor output.
• Input Monitoring: Supports 1- or 2-channel wiring, with or without cross-wire monitoring (detection of shorts across contacts).
• Start Configuration: Supports manual or automatic start.
• Diagnostic Display: Features LEDs for monitoring supply voltage, input status (channel 1 & 2), switch status, reset circuit, and errors.
• Compact Design: 17.5 mm width, with plug-in screw terminals. [1, 2, 3]

Technical Specifications

• Supply Voltage: 24 V DC.
• Safety Category: Up to PL e (ISO 13849-1) and SIL CL 3 (IEC 62061).
• Contact Rating: 6A (24V DC/240V AC).
• Response Time: Approx. 12 ms.
• Mounting: DIN Rail.
• Operating Temperature: -10°C to +55°C.

Common Applications

The PNOZ s3 is versatile and used for monitoring safety devices in various machinery, including:

• Emergency stop buttons.
• Safety gate limit switches.
• Light curtains/beam devices.
• Safety sensors (PSEN).