Modular safety system

The Sirius 3RK3 MSS modular safety system combines the functionality of a simple safety relay and a fail-safe PLC.

The core of the system is the central unit with eight safety-related inputs, one safety-related relay output and one safety-related solid-state output. Up to seven safety or standard expansion modules can be connected to it. The expandability makes the one system scalable for applications with as little as three safety functions to as many as 40.

The device is claimed to provide significant savings where several safety relays are required to combine various safety functions due to its modular design, while offering a reduction on future installation costs when circumstances change or additional functionality is required. Extra functions can be easily added by installing additional expansion modules.