For connecting 4 independent, potential-free working or resting contacts for displaying technical states (e.g. door or ventilation control) or for triggering an alarm (e.g. sprinkler alarm). , 4 inputs for potential-free signal contacts. The input lines are monitored for interruption and short circuit (terminating resistors). The inputs can be configured independently of one another via the fire alarm control panel for status or alarm messages. Status display using LEDs. Power supply via FDnet/C-NET., Input module including 8 resistors and 2 mounting feet for TS35 top hat rail.