DGM-8LS, 8 Zone

Product Information

DGM-8LS, 8 Zone

The unit communicates with the System 3505 Prism LX™ head-end via a dedicated cable pair. Multiple panels can be monitored on a pair of wires. The DGM panel monitors 8 end- of-line resistor alarm inputs per DGM panel. Information is passed to the 3505 by a polling technique.

The System 3505 Prism LX™ polls all DGM panels for any change in status. All status changes are held in memory by the DGM, even if the condition clears. Inputs are supervised so that any break in the input circuit will cause a “Trouble” condition to be reported by the zone.

The DGM-8LS is supplied with 8 inputs. A steel enclosure houses the DGM-8LS with a step-down transformer, tamper switch, CAM lock, data link interface, 60 hour standby battery and built in charger. Eight alarms and eight trouble LEDs show zone status. Each zone has a built-in bypass switch for taking a zone out of service. Out-of-service zones report their condition to the head- end equipment.

The DGM-8LS is normally powered by 117 VAC through the internal step-down transformer and uses a 12VDC as backup when AC is the main source. Loss of AC power for more than 15 seconds is reported to the System 3505 Prism LX™ for display. The length of time before a loss of power is reported to the system can be set by the user for any value between 1 and 90 seconds. Should the battery voltage drop before a preset level, a “Low Battery” condition will be reported for display. In normal operation, the DGM internal charger will keep the standby battery at full charge.

The DGM-8LS switches from AC to battery power without interruption in service.