PNOZ X safety relays are a type of safety relay module designed for monitoring and managing safety functions in machinery and industrial applications. http://www.pilz.com These relays are produced by Pilz,

The PNOZmulti 2 system from Pilz is a versatile and modular safety controller system designed for a wide range of safety applications. The base unit PNOZ m B0 is an

The safety system, including the base unit and expansion modules, typically monitors feedback loops to ensure all safety contacts are functioning correctly and that the safety system operates reliably. http://www.pilz.com

The expansion modules are connected to the base unit to extend its functionality. This can be through a dedicated communication bus or wiring scheme. Used in various industrial safety applications