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Pilz PNOZ S4 750104
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B&R 4PP045.0571-K30
B&R 4PP045.0571-K30

Pilz PNOZ S4 750104

Product Name: PNOZ sigma Compact Safety Relay, 24 V DC
Product Overview
PNOZ S4 is a standalone safety relay for emergency stop, safety gate, and light curtain monitoring. It achieves PL e / Cat. 4 / SIL 3 in the correct wiring.
Category:
Description
Technical Specifications
  • Supply: 24 V DC, consumption 2.5 W
  • Inputs: 2 safety channels (S11-S12, S21-S22), single/dual channel, cross-short detection
  • Outputs: 3 NO safety contacts (13-14, 23-24, 33-34), 1 NC auxiliary (41-42), 1 semiconductor output
  • Contact rating: 6 A at 240 V AC AC-1, 6 A at 24 V DC DC-1, 5 A AC-15 at 230 V
  • Reset: manual / automatic / monitored manual via selector
  • Dimensions: 22.5 × 98 × 120 mm
  • Weight: 185 g
  • Housing: PC material, IP40 front/body, IP20 installed
  • Certifications: CE, CCC, UKCA, cULus, TÜV, KOSHA, EAC
  • Standards: EN ISO 13849-1, IEC 62061, EN 60947-5-1
Functional Features
  • Forced-guided contacts
  • LED for power, input 1, input 2, output, reset, fault
  • Plug-in screw terminals
  • DIN 35 mm rail mount
Application Scenarios
Any machine needing certified emergency stop disconnect: presses, CNC, robot fences, assembly lines.
Working Principle
Both input channels closed → internal relay energized → safety NO contacts close to enable contactor coil → any channel opening or cross-short removes relay energy and drops safety outputs.
Installation Requirements
A1/A2 to 24 V DC. Emergency stop NC contacts in series on S11-S12 and S21-S22. Safety contacts in series with main contactor coil. Keep yellow safety wires separated from power wiring.
Usage Notes
Do not permanently short S21-S22 in dual-channel mode. Reset must follow machine risk assessment. Flashing fault LED indicates internal failure, return for service.
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