Product Short Description
Product Introduction
PNOZ S4 750104 is a compact standalone category 4 PL d / SIL 3 safety relay manufactured by Pilz, a global leading functional safety automation brand. It belongs to the PNOZsigma modular safety relay product family, designed for monitoring critical machine safety signals including emergency stop pushbuttons, mechanical safety gate interlock switches, light curtains and safety light barriers. The unit adopts dual-channel redundant input circuit architecture with internal cross-monitoring logic to detect input circuit short-circuit faults
Description
Core Function Features
- Dual-channel redundant safety input circuit with cross-fault monitoring: Detects input wire breakage, inter-channel short-circuit and earth leakage faults automatically
- Multiple configurable start-up modes via front rotary selector switch: Automatic start, manual monitored start, rising/falling edge monitored start logic
- Output contact configuration (750104 variant): 3 force-guided normally open (N/O) safety cut-off contacts, 1 force-guided normally closed (N/C) auxiliary fault signal contact, 1 semiconductor status output for PLC diagnostic signal transmission
- Force-guided safety contact technology: Mechanical interlock between N/O and N/C contacts prevents simultaneous closing of both contact types, eliminating dangerous contact welding failure risks
- Integrated multi-color LED diagnostic indicator array: Independent LED status lights for Power supply, Input Channel 1, Input Channel 2, Safety Output, Start Trigger and System Fault; LED flashing fault code signals for rapid on-site troubleshooting
- Modular expansion capability: Side interconnection connector supports direct connection with PNOZsigma series contact expansion modules to expand total safety contact quantity without additional wiring
- Compact narrow housing form factor: Only 22.5 mm cabinet width, high-density installation for multi-safety-channel machine control cabinets
- Global international safety certifications: CE, UKCA, cULus Listed, TÜV Rheinland functional safety certification, CCC China compulsory certification, EAC Eurasian conformity certification, KOSHA Korean occupational safety certification
Technical & Performance Specifications
表格
| Parameter | Standard Value (750104 24VDC Model) |
|---|---|
| Manufacturer Order Code | 750104 |
| Nominal Supply Voltage | 24 VDC (permissible operating range: 20.4 VDC ~ 26.4 VDC) |
| Rated Power Consumption | 2.5 W DC power draw at nominal supply voltage |
| Safety Input Channel Quantity | 2 redundant dual-channel safety signal inputs |
| Input Signal Voltage Compatibility | 24 VDC sinking/sourcing safety sensors (E-stop, safety gates, light curtains) |
| Output Contact Configuration | 3 × Force-guided N/O safety contacts; 1 × Force-guided N/C auxiliary contact; 1 × Semiconductor diagnostic output |
| Safety Contact Rated Switching Capacity | 250 VAC / 6 A resistive load per N/O safety contact |
| Auxiliary N/C Contact Rated Capacity | 250 VAC / 3 A resistive load |
| Semiconductor Diagnostic Output Rating | 24 VDC / 100 mA sinking output for PLC fault diagnosis |
| Functional Safety Rating | Category 4, Performance Level PL d, Safety Integrity Level SIL 3 |
| Internal Fault Detection Coverage | 99% diagnostic coverage for input circuit short, open, earth faults |
| Housing Width | 22.5 mm narrow compact DIN rail module |
| Mounting Standard | 35 mm standard top-hat DIN rail |
| Operating Temperature Range | 0°C ~ +55°C cabinet ambient temperature |
| Storage & Transport Temperature | -20°C ~ +70°C |
| Relative Humidity | 10% ~ 90% non-condensing |
| Ingress Protection Rating | Front panel IP54; Rear terminal wiring area IP20 |
Material Composition & Structural Characteristics
- Outer Housing Material: High-impact flame-retardant PA66 plastic housing (UL94 V-0 fire resistance rating), bright yellow safety standard color for easy visual identification in electrical cabinets
- Internal Core Components: Dual independent relay coils with force-guided mechanical contact interlock structure; dual-channel signal monitoring printed circuit board with SMD fault detection electronic components
- Terminal Hardware: Plug-in screw-clamp terminal blocks for all input, output and power wiring; removable terminal connector plugs allow quick module replacement without re-wiring field sensor cables
- Mechanical Mounting Structure: Integrated spring-loaded DIN rail buckle clip on rear housing panel for rapid installation and removal from standard 35 mm DIN rail; vertical mounting requires auxiliary fixing bracket to prevent module sliding downwards
- Modular Expansion Interface: Dedicated side interconnection connector on left housing panel for direct mechanical and electrical connection with PNOZsigma contact expansion modules; blanking terminator plug installed when no expansion module is connected
- Physical Dimensions: 90 mm (H) × 22.5 mm (W) × 120 mm (D); Net weight: 180 g
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