VIDEX DM3 Door Monitoring Module
DM3
The DM3 is a self contained door monitoring unit requiring only an external low voltage power supply and a set of normally closed door contacts. There is an internal sounder and an override key switch to disable the unit.
Built in chime facility
Monitors whether door is opened/forced open/left open
Door forced alarm state
Internal sounder can be programmed to chime when door opens or generate alarm sound during alarm conditions