Fire Pressure Switch protects pipeline equipment and is a key component in the fire sprinkler system, installed within the wet alarm valve of the system. The function of the fire pressure switch is to automatically activate when the pressure in the fire sprinkler pipeline drops below the supply pressure, and it sends the activation signal back to the main control panel of the automatic fire alarm system. Upon receiving the signal, the control panel initiates the fire sprinkler pump to pressurize the system. The input module, also known as the monitoring module, is used to detect the operational status of equipment. It typically monitors devices using normally open signals; once the monitored device activates and the normally open contact closes, it sends an alarm signal to the main control panel indicating the device's activation.