Product Overview

The MultiAmp-DH 250mA Door Holder Supply (DHS) provides up to 250mA of current at 24 VDC to operate door holders. The unit can operate as an “Automatic Door Release System” (ADRS) or respond to a secondary control.

When configured as an ADRS, conventional detectors are installed and connected directly to the DHS. The detection circuit is monitored for alarm, open, or short circuit conditions. The presence of any one of these conditions will deactivate supply to the door holders and cause doors to be released.

Alternatively doors may be released by a switched VDC input to the DHS, derived normally from a Fire Alarm Control Panel (FACP) or security system.
The switched VDC input must be between 8 to 30VDC to release the doors.

• Mains powered 240vAC supply.
• On board conventional detection zone.
• Switches off DH power in alarm condition or atlernatively remote switched input can trigger the door to release.