The Model 091-158 ALARM CONTROLLER signals an alarm from up to 3 inputs. The device implements a 3 input "OR" gate or a 3 input "AND" gate. In the "OR" mode the alarm is sounded when any one of hte 3 inputs is detected. In the "AND" mode the alarm is sounded only when input 1, input 2 and input 3 are all present. The device maintains complete isolation of the inputs and may be used with other sensors such as low voltage detectors or time delays to implement a variety of alarm sequences.