The PSRmodular configurable safety system enables engineers to implement small applications with three safety functions and applications with up to 160 I/Os. Alongside monitoring classic safety functions, such as emergency stop signals, safety door locks, light grids and safety shut-off mats, safety functions such as speed, downtime or direction of rotation as well as secure analog value monitoring also can be realized. The system is intended for machines and process applications up to PLe or SIL 3. The system is compatible with common bus protocols, such as Profinet, EtherNet/IP, Modbus/TCP and EtherCAT.