The PNOZ S4 is a compact safety relay from Pilz's PNOZsigma series. It is designed to perform safety-related interruption of a safety circuit and is used for monitoring emergency stop pushbuttons, safety gates, light beam devices, and light grids. The unit features a redundant, self-monitoring circuit that maintains the safety function even if an internal component fails.
Both models share identical electrical specifications and output configurations:
| Feature | Specification |
|---|---|
| Safety Outputs (N/O) | 3 positively-guided safety contacts, instantaneous |
| Auxiliary Output (N/C) | 1 auxiliary contact (not for safety circuits) |
| Semiconductor Output | 1 transistor output (24V DC, 20 mA) for status signaling |
| Supply Voltage | 24V DC |
| Contact Rating | 240V AC / 6A; 24V DC / 6A |