The relay can monitor other safety devices such as safety mats, pressure-sensitive devices, and other sensors to ensure that they are functioning correctly. Safety relays often include diagnostic capabilities to detect faults in the safety system itself. This includes detecting wiring faults, component failures, or other issues that could compromise safety.
The PNOZ X relays are designed to be flexible, allowing users to configure them for different safety functions through software or hardware settings. http://www.pilz.com Many models feature modular designs that enable users to expand or modify their safety functions as needed, adding more inputs/outputs or integrating with other safety systems.