On the fire alarm side you would need a control relay to intercept a switch leg of power to the door holder circuit as well as an initiating device such as a smoke detector to activate the relay.
Magnetic door holder fire alarm.
Electromagnetic door holders should be used and.
The device holds a door open while energized.
These fire rated door holders have an energized coil which creates a magnet strong enough to hold the self closing fire rated doors in the open position.
Wire these holders directly into your fire alarm system.
A magnetic door holder is a relatively simple device that when powered typically by 24vdc or 120vac will create a magnetic pull.
In the event of a fire emergency the fire alarm control panel or other compatible control means will release the magnet allowing the door to close to prevent the spread of smoke.
The magnet is fail safe and will hold the door until the current is interrupted.
Door holders closers can play an important role in controlling smoke migration in a building.
Depending on your fire alarm installation you may need to install a magnetic door holder at the location of each fire door.
When de energized by a relay controlled by the fire alarm system or other switch the door is released to a closed position checking the spread of smoke and flames.
Mount the wall plate in an electrical outlet box or use a surface mount box sold separately.
The tri voltage design provides 35 pounds of holding force.
The magnetic portion of this device is installed on the wall that meets the open fire door now to tie this whole concept together you will.
In the event of a power failure they release the door to a closed position to keep the facility secure.
When activated by a fire alarm the magnet shuts off and releases the door.
Our cal royal magnetic door holders and magnetic fire door holders are ul listed for both the us and canadian market as well as approval from the california department of forestry and fire for the state of california.
Electromagnetic door holders and releasers keep doors open until they are released by fire alarm systems remote smoke detectors or other switching devices.
These door holder releases have a holding force of approximately 25 lbf 111n.
They provide a high holding force.
All are reversible for right or left door swing directions.
For use with doors that already have a closer these holders keep doors open with an electromagnet.
The sentronic 7800 series magnet releases when the fire alarm panel enters an alarm condition and the electrical current is interrupted allowing the door to perform manually until power returns.
