That system will actually do that for you, the ‘UT-2500’ part of the system (doorbell) also functions as a magnetic contact sensor to operate as a door switch.
Articles Tagged: door switch
What is the difference between your NO and NC door switches?
NO (normally open) means that the internal switch is open when the magnetic module is against the switch module (door is closed). NC switches are the opposite.. the internal switch is closed when the magnet is against the switch. Most security systems call for NC door switches so if the wire is cut the alarm […]