The Pilz PNOZ S3 C 24VDC 2 N/O (Part No. 751103) is a high-performance safety relay developed for reliable monitoring of safety functions in industrial environments. As part of the PNOZsigma series, it is designed to provide maximum functionality in a compact format, offering machine builders and operators a reliable and efficient solution for ensuring personnel and equipment protection.

Powered by a 24 V DC supply, the relay is well-suited for modern control systems where DC-based safety logic is standard. Its low power requirements support energy-efficient operation while maintaining robust performance under continuous use.

The PNOZ S3 C is designed with dual-channel monitoring, featuring 2 inputs that provide redundancy and fault detection. This ensures that critical safety devices—such as emergency stop buttons, guard doors, two-hand control systems, and enabling switches—are properly supervised. Dual-channel monitoring allows the relay to detect wiring faults, cross faults, or input discrepancies, thereby preventing unsafe restarts and enhancing overall system reliability.

The output side of the relay provides 2 normally open (N/O) safety contacts, which are used for reliable shutdown of actuators, motors, or other hazardous machine functions when unsafe conditions are detected. In addition, the relay includes 1 semiconductor output, offering a wear-free solution for diagnostic signalling or communication with higher-level control systems. This extra output capability improves transparency and system monitoring, helping operators quickly identify system status and minimise downtime during troubleshooting.

Built to comply with EN 60947-1 (DC-12 utilisation category), the relay provides long-lasting durability and is rated for 240 V AC at up to 6 A. This robust switching capacity ensures safe disconnection of industrial loads, even in demanding environments.

The compact design of the PNOZ S3 C is a defining feature of the PNOZsigma range, optimising space in control cabinets while still offering high functionality. Clearly labelled terminals simplify wiring and reduce installation times, while its modular format allows easy expansion and combination with other Pilz relays for customised safety system designs.

The PNOZ S3 C finds application in a wide range of industries, including automotive manufacturing, packaging, robotics, pharmaceuticals, food and beverage processing, and general machine building. It is especially suited for small to medium-sized machines requiring reliable E-STOP and guard monitoring, but can also be integrated into larger safety architectures where modularity and space-saving designs are valued.

In summary, the Pilz PNOZ S3 C 24VDC 2 N/O (751103) delivers efficient DC operation, dual-channel safety monitoring, flexible outputs, and robust switching performance. It is a compact yet powerful safety relay that ensures compliance with international safety standards, providing machine builders and operators with a reliable solution for safeguarding both personnel and machinery in demanding industrial automation applications.