For Keeping Fire Doors Open
EM Door Holders are designed to keep the doors open. They can be wall-mounted or floor mounted.
The EM Door Holders comprise a door-mounted catch plate and a floor or wall-mounted electromagnet. A 12Vdc or 24dv power supply is required to keep the electromagnet energised. This power supply is connected in series with a relay contact controlled by the fire alarm system.
In the event of a fire alarm, the relay will be de-energized, cutting off the 12Vdc power from the door holder. The door once released will swing to its closed position.
The Door Holders are used for Fire Doors. Under normal conditions, the door holder keeps the doors open. In the event of a fire, the fire alarm system will activate and send a signal to close the doors. These fire doors are designed to keep the smoke from spreading to other sectors.