Product Overview: The Pilz PNOZ S3 (often specified with a full part number like 750103 or 751103 for screw/spring-loaded terminals respectively) is a compact, high-performance safety relay from the PNOZsigma series. Designed for monitoring emergency stop pushbuttons, safety gates, and light beam devices, this standalone module provides a safety-related interruption of a safety circuit. It offers flexible wiring options (1 or 2 channels with/without detection of shorts across contacts) and various start modes (manual/automatic/monitored). With positive-guided relay outputs (typically 2 N/O safety contacts and 1 semiconductor output), the PNOZ S3 ensures reliable and redundant safety functionality. Its narrow 17.5 mm housing saves space in control cabinets, and integrated diagnostics via LEDs simplify troubleshooting, making it a highly effective and widely approved solution for crucial machine safety applications.

 
Technical Specifications:

 
Part Number: PNOZ S3 (often with full part number like 750103 for screw terminals, or 751103 for spring-loaded terminals)
 
Manufacturer: Pilz
 
Product Series: PNOZsigma (PNOZ s3)
 
Type: Safety Relay (Standalone)
 
Supply Voltage (UB): 24 V DC
 
Power Consumption DC: 2.5 W
 
Inputs: 2 (1 or 2-channel wiring with/without detection of shorts across contacts)
 
Safety Contacts (N/O): 2 (positive-guided relay outputs, instantaneous)
 
Semiconductor Outputs: 1 (not for safety circuits)
 
Utilisation Category (Relay Outputs): AC1 (240V, 6A), DC1 (24V, 6A), AC15 (230V, 5A), DC13 (24V, 6A)
 
Safety Category (ISO 13849-1): PL e / Category 4
 
Safety Integrity Level (IEC 62061): SIL 3
 
Reset Method: Automatic, Manual, Monitored (via rotary switch)
 
Terminal Type: Plug-in (available as screw terminal or spring-loaded terminal)
 
Housing Material: PC (Polycarbonate)
 
Mounting: DIN rail (NS 35)
 
Protection Class: IP20
 
Dimensions (H x W x D): Approx. 100 mm (3.94 in) x 17.5 mm (0.69 in) x 120 mm (4.72 in)
 
Net Weight: Approx. 140 g (0.31 lbs)
 
Ambient Temperature: -10 °C to +55 °C
 
Humidity Rating: 93% r.h. at 40 °C (non-condensing)
 
Approvals: CCC, CE, UKCA, cULus Listed, KOSHA, EAC, TÜV
 
Standards: EN 60947-5-1, EN 60204-1, VDE 0113-1, EN 61000-6-2, EN 61000-6-4, EN 61326-3-1, EN ISO 13849-1, IEC 62061
 
Product Lifecycle: Active product.