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PILZ 751104 refers to the PNOZ s4 C safety relay, a compact and high-performance unit from the PNOZsigma series, designed for emergency stop and safety gate monitoring. It is an enhanced variant of the standard PNOZ s4, offering the same safety logic with a different terminal configuration.

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🔧 Technical Overview: PILZ PNOZ s4 C (Part No. 751104)

Attribute	Specification
Series	PNOZsigma
Model	PNOZ s4 C
Part Number	751104
Supply Voltage	24 V DC
Power Consumption	2.5 W
Inputs	1-/2-channel wiring with/without short detection
Start Types	Manual, automatic, monitored manual
Outputs	3 N/O (safety), 1 N/C (monitoring), 1 semiconductor
Terminal Type	Plug-in spring-loaded terminals
Mounting	DIN rail
Dimensions (WxHxD)	22.5 × 98 × 120 mm
Weight	~195 g
Protection Class	IP20
Ambient Temperature	–10°C to +55°C
Certifications	CE, cULus, EAC, TÜV, KOSHA, CCC
Standards Compliance	EN ISO 13849-1 (PL e), EN 62061 (SIL CL 3), EN 60204-1, EN 60947-5-1

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✅ Application Notes

• Use Cases: Emergency stop circuits, safety gate monitoring, light curtain integration
• Functionality: Identical to PNOZ s4 (750104) but with spring-loaded terminals for faster, tool-free wiring
• Diagnostics: LED indicators for input/output status and fault detection
• Safety Category: Up to PL e / SIL CL 3 depending on wiring and application
• Migration Tip: Drop-in replacement for PNOZ s4 when spring terminals are preferred over screw terminals

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🔁 Related Models in the PNOZsigma Series

Model Number	Key Differences
750104 (PNOZ s4)	Same logic, screw terminals
751105 (PNOZ s5 C)	Time delay function with spring terminals
751106 (PNOZ s6 C)	Extended delay and feedback loop monitoring
751107 (PNOZ s7.1 C)	2-channel with delay and feedback loop
751108 (PNOZ s7.2 C)	Dual delay outputs, spring terminals

All models share:

• Compact 22.5 mm width
• DIN rail mounting
• Modular terminal options (screw or spring)
• Consistent safety logic across variants

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