Addressable loop powered, loop controlled door holder. Takes all its power from the loop. Consists of a controller unit. Permanent magnet door holder. Door holder controller can then be programmed to operate in a similar manner to an Input/ Output unit. Current consumption allows the use of up to 20 units per loop.
Manual door release button. Built in loop short circuit isolator. Supply voltage: 17-33 V DC. Operating temperature: 0°C to 60°C.