Fire Alarm Door Release Relay

Developed to be compliant with the bs 7273 4 2015 code of practice for the fail safe operation of door release mechanisms and door holders.

Fire alarm door release relay.

According to section 5 14 6 3 when smoke alarm units are used to release doors they must be listed for smoke control. The door release module is an interface designed to enable eaton s addressable fire alarm systems to work in tandem with door holders retainers. Integrating fire alarm control using direct wiring. To prevent transient voltage spikes from burning out the control relay contacts an auxiliary relay with big contacts should be installed between the fire alarm control relay and the door holders.

The door access control reader and the electric lock can be wired to the fire alarm in a number of different ways. Schematic diagram showing how to land the wires when using an auxiliary. Then the auxiliary relay takes the voltage spike and the fire alarm control relay only has to turn off the auxiliary relay. The use of 120vac smoke alarms for the automatic release of smoke doors in a facility was once a common method of smoke control.

These contacts can be used to control external appliances such as dampers fans door holders etc. It ensures that in the event of a fire or a fault on the fire alarm system any doors that are. Relay module 55 043 provides two sets of form c dry relay contacts that switch together one dpdt relay. Today open area smoke detectors are most often used.

In this next section you will learn why.