The PNOZsigma safety relay stands as a cornerstone of industrial safety systems, a standalone device engineered to deliver robust protection in automated environments. At its core, the PNOZsigma is designed as a self-contained safety solution, eliminating the need for complex external wiring or auxiliary components. This standalone architecture ensures rapid integration into existing machinery, reducing installation time and minimizing the risk of wiring errors-a critical advantage in industries where downtime directly impacts productivity.
A defining feature of the PNOZsigma is its versatile input wiring options: 1/2-channel configurations accommodate both single and dual-input safety devices, such as emergency stop (E-STOP) buttons, safety and light guards. What sets it apart is its ability to detect shorts across contacts-a common failure mode in safety circuits. In a 2-channel setup, the relay continuously monitors for cross-circuit shorts; if detected, it triggers a safety shutdown, preventing uncontrolled machine operation. This diagnostic capability aligns with international safety standards (e.g., EN ISO 13849-1), ensuring compliance with Performance Level (PL) requirements for risk mitigation.The PNOZsigma also offers dual start modes: manual and automatic. Manual start requires an operator to physically activate the machine after a stop condition, ensuring intentional restart. Automatic start, conversely, allows the machine to resume operation once the safety condition is cleared, streamlining processes in applications like conveyor systems where frequent stops are impractical. This flexibility caters to diverse operational needs, from high-risk environments (e.g., press machines) to more dynamic production lines.
| Model Number |
751124 |
| Product Name |
PNOZ s4.1 C 24VDC 3 n/o 1 n/c |
| Supply Voltage (V) |
24 V |
| Type of Supply Voltage U1 |
DC |
| Power Consumption (DC) |
2.5W |
| Product Range |
PNOZsigma |
Audited Supplier 
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