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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.
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 |
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
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
VN 25666 
AR 5878 
BR 3393 
CN 3351 
US 2162 
EC 1988 
BD 1520 
RU 1358 
