The alarm relay mode of the craft interface panel for both yellow and red alarms. Both yellow and red alarms could be cut off by a front panel Alarm Cutoff / Lamp Test (ACO/LT) button. In the pass-on mode, the alarm relay will be activated to pass on the yellow or red alarms. In the cut-off mode, both yellow and red alarms will be cut off from the alarm relays which are normally connected to audible sirens or visual flashing devices.