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PILZ 750104 refers to the PNOZ s4 safety relay, a compact and versatile unit designed for emergency stop and safety gate monitoring. It supports 1-/2-channel wiring, offers multiple reset modes, and is actively supported for industrial safety applications.

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🔧 Technical Overview: PILZ PNOZ s4 (Part No. 750104)

Attribute	Specification
Series	PNOZsigma
Model	PNOZ s4
Part Number	750104
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 screw 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 60204-1, EN 62061, EN ISO 13849-1, EN 60947-5-1

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✅ Application Notes

• Use Cases: Emergency stop circuits, safety gate monitoring, light curtain integration
• Functionality: Supports flexible wiring and reset options for integration into various safety architectures
• 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: Compatible with other PNOZsigma modules for expansion or replacement

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🔁 Related Models in the PNOZsigma Series

Model Number	Key Differences
750103 (PNOZ s3)	2 N/O + 1 N/C outputs, simpler logic
750105 (PNOZ s5)	Time delay function included
750106 (PNOZ s6)	Extended delay and feedback loop monitoring
750107 (PNOZ s7.1)	2-channel with delay and feedback loop
750108 (PNOZ s7.2)	Dual delay outputs

All models share:

• Compact 22.5 mm width
• DIN rail mounting
• Plug-in terminal design for fast replacement

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