The Pilz S1MS 400VAC 2C/O monitoring relay is a high-reliability device engineered for continuous supervision of voltage and resistance levels in industrial control systems. As part of Pilz’s well-regarded monitoring devices range, this relay is designed to provide dependable detection and control, ensuring that equipment and processes operate within safe and stable parameters.

Operating on a 400 V AC supply, the S1MS 400VAC 2C/O is particularly suited to high-voltage industrial environments such as heavy machinery, power distribution, and large-scale automation systems. Its compatibility with this supply level ensures seamless integration into energy-intensive operations, supporting both safety monitoring and process control.

Equipped with two changeover contacts (2C/O), the relay delivers exceptional versatility. These dual outputs allow the unit to perform multiple monitoring or switching functions at once, such as activating alarms, isolating loads, or triggering secondary safety mechanisms. This flexibility makes it an indispensable component in complex automation systems where redundancy and adaptability are crucial.

A key feature of this monitoring relay is its response sensitivity, with a resistance value set at 3.6 kΩ ±10%. This precise threshold ensures accurate supervision of system parameters, providing early detection of potential irregularities or faults. Such accuracy is vital for protecting connected devices from damage and for maintaining smooth operation of critical processes.

Despite its robust performance, the relay remains energy efficient, consuming only 3.5 VA under AC operation. This efficiency not only helps reduce operating costs but also minimises heat generation, supporting longer component life and reliable operation in compact control cabinet installations.

The compact and rugged design of the S1MS 400VAC 2C/O ensures it can withstand the rigours of industrial environments. Its durability makes it suitable for continuous use in sectors such as manufacturing, energy, process industries, and logistics, where long-term reliability is a non-negotiable requirement.

Applications include motor protection, conveyor systems, voltage supervision in distributed control networks, and machine safety functions. The dual contact outputs and precision monitoring capabilities ensure that processes remain safe, stable, and efficient, even under demanding operating conditions.

In summary, the Pilz S1MS 400VAC 2C/O monitoring relay combines high-voltage compatibility, dual contact flexibility, precise response sensitivity, and energy efficiency in a compact and durable package. It offers industries a dependable monitoring solution that not only safeguards equipment and personnel but also supports the reliable and efficient operation of modern automation systems.