The EM830 Series of Hold Open Magnets can work as standalone or with an integrated fire system. These failsafe devices will automatically release if connected to a fire detection system.
Some models include integrated “interrupter buttons” giving the ability to open or close the door manually at any time. Other models have an integrated soft close shock absorbers for silent operation i.e. in Hospitals.
Hold open devices are primarily used for fire doors, but not only limited to this application. Other known applications are doors that require to be held open for several hours i.e. with Cabin Hooks. For this application the device needs constant power and no “smarts” are required.