Magnetic Door Holder (ZT-DR240)

In the event of a fire, the door holder magnet can be turned off by the fire alarm, allowing the door to shut.

There are two versions available, 24V DC and 240V AC;

• The 24V DC door holder requires either a panel with a 24V DC output, or a separate 24V power supply unit. This can be switched through the FACP aux relay, but it might need back EMF diodes fitted to the Door Holder (1N4002 or similar, stripe to +, non-stripe to -).
• The 240V AC door holder is powered through the mains. Unless otherwise stated in the fire alarm control panel manual, these must not be switched through the fire alarm control panel aux relay. (Most fire alarm control panel relays are SELV-low voltage). Fit a mains rated relay driven from the sounder circuit, and switch through this relay instead.

An optional Floor mounting bracket is also available.