The DM.1 Door Monitor is designed to be used where there are potential problems for maintaining security of doors in buildings, say large retail stores, when there has to be access during the day for safety reasons (fire doors) but security at night.
The Door Monitor can cover up to eight doors and works in conjunction with standard intruder security control equipment. When the control panel is inactive the fire doors are monitored so that if a door is disabled a sounder in the unit is activated and an indication is provided. While the control panel is active (that is when the security system is set at night) the monitoring is reversed so that an alarm is generated if any of the doors is opened.
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