DIGITIZE DGM-32/64, Installation And Maintenance Manual

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DGM INSTALLATION AND MAINTENANCE MANUAL
700135-0000 Rev. O 43
5.4 OPERATING PROCEDURE
5.4.1 GENERAL
In the event that a zone changes from SECURE to ALARM status, an LCD message will
indicate the zone number in alarm, and the ALARM LED will light. The zone information
will also be sent to the SYSTEM 3505 PRISM LX on the next polling cycle. The DGM
will maintain the status change message until the SYSTEM 3505 PRISM LX acknowledges
the status change and the condition is restored.
The DGM’s have been designed to work without an operator, but in the event of the data
link going down, each DGM will operate from the internal keypad. When a change in state
occurs, the CLR/SIL button is pressed to acknowledge the change. If the beeper has
been activated it will sound when a change of state occurs and the data link is down. If the
data link is up, then the beeper will not sound.
5.4.2 NORMAL QUIESCENT OPERATION
During normal quiescent operation, the green POWER LED is illuminated, the
TRANSMITTER LED flashes to indicate an “active” status on the communications line,
and the time displays on the bottom line of the LCD.
5.4.3 ALARM CONDITION
An alarm condition is initiated by the closure of a normally open contact, or the opening of a
normally closed contact, across any zone input pair. This is indicated by the red ALARM
LED. Alarm zone information will be shown on the LCD. The ALARM LED remains
illuminated until the SYSTEM 3505 PRISM LX acknowledges receipt of the alarm and
all zones are secured.
5.4.4 TROUBLE CONDITION
When a trouble condition occurs, the yellow TROUBLE LED will illuminate. It remains
illuminated until the SYSTEM 3505 PRISM LX acknowledges receipt of the trouble and all
zones are secured.
5.4.5 STANDBY POWER OPERATION
The DGM transfers the system power load to the standby battery whenever the main
power fails or falls below the nominal level. The system will remain fully functional in this
mode until the main power is restored or until the system detects a low battery condition.
Standby Power Operation is indicated by a message on the lower line of the LCD, and
also by the absence of the green AC POWER LED. The backup battery (6.5 AH for hard-
wired units, 13 AH for radio units) will suffice for 60 hour backup, even under full-load
conditions.
5.5 EXTERNAL KEYPAD
For the purpose of Entry Zone security, each DGM can monitor 16 optional external
keypads connected in parallel via four wires (two for power, two for data). All power to the
keypads is provided by the DGM panel.