DHI-HY-1400 Addressable Input Module is a mated product of the Addressable Fire Alarm Control Panel, regulating the normal operation of external fire protection device. When the external device is abnormal, the Addressable Fire Alarm Control Panel will confirm a fire alarm according to the received message sent from the module. It can be connected with various passive, normally open on-off pieces of equipment, such as water flow indicators, pressure switches and other firefighting equipment.