MDH MAGNETIC DOOR HOLDER
A comprehensive range of magnetic door retainers designed to release doors to prevent the spread of smoke and flames during a fire condition.
The MDH/24 unit is normally powered from the Trans-Rec II and controlled from either the Fire Panel or a local sounder circuit. Each unit consists of two parts, a sprung door plate which fits to the door, and the magnetic door holder which may be fitted onto the adjacent wall or with the optional floor mounting bracket FMB, may be mounted on the floor.
As the unit is fail-safe in operation, failure of the supply to the magnetic retainer will leave the door in a safe condition. The MDH/240 is a 240vAC mains alternative and each unit is normally powered from a mains supply circuit which may be interupted to close the doors.