Modular safety switchgear system

Modular safety switching device system for switching on and secure switching off actuators (21), with at least one dual-channel input module (18) for securely evaluating a safety transmitter (20) and for generating an output signal, and at least one output module (19) for securely operating the actuator (21) depending on the output of the input module (18), wherein at least the input module can be operated in different modes, and wherein all selectable operating modes monitoring, logic and driving parts of the program stored in the safety switching device system further comprising a control module (16) for individually setting the operating mode of each input and output module (18, 19), and with a display means (30) for secure display of the set mode of the input module (18) and / or the output module (19), wherein the display means ( 30) has a number of selectable modes includes, corresponding number of light elements (32), preferably light-emitting diodes, and the function of the display means (30) is checked so that leave the user in setting the operating modes on the respective display mode can.