Alarm Inputs; Alarm Contacts; Action On Alarms - Dedicated Micros Dennard DTX1000 Manuel D'installation

Alarm Contacts

Installer fitted
keyswitch to
control alarm
package
Keyswitch
Action on alarm
Each alarm can be programmed to switch monitor 1 to display a specific camera and go to a preset
position for that camera. An alarm message is displayed on the monitor and the alarm output relay
closes for a programmed length of time. If the sequence is running, then the alarm time is added to
the sequence time and the sequence continues to run after the alarm times out. If the sequence is
not running the alarm message and selected camera remain on monitor 1 until a manual camera
selection is made.
The camera selected and the preset command issued is programmable via the keyboard, press the
set button and follow the on screen commands.
The length of time the contacts stay closed is also programmable. Press the set button and follow
the on screen commands. To disable the set button remove the shorting link from the small
rectangular slot below the monitor 2 output. To take advantage of the go to preset feature,
Dennard drx400/drx400dc receivers or Dennard drx100 dome
preset pan/tilt /zoom heads must be fitted.
Alarms and the Dennard drx400dc & Dennard drx100 high and variable speed d.c. receivers
These receivers have local alarm inputs and a single normally closed relay output that
opens momentarily when a local alarm is activated. This output can be wired to an alarm
input on the Dennard dtx1000.
A local alarm on the receiver will cause the relevant preset position to be automatically selected
without the intervention of a telemetry transmitter. See the receiver handbook. If the transmitter also
generates a go to preset command, then the receiver's go to preset will be overruled. To overcome
this alarm, preset 16 now becomes a special that disables a go to preset command.
If the local alarm feature of any d.c. or Dennard drx100 receiver is used, then set the alarm preset
position to 16. The standard a.c. Dennard drx400 receiver can be programmed to go to preset
positions 1 - 15 during an alarm.
If 16 preset positions are required then software is available.
Dennard DTX1000 Installation Manual
The alarm package may be enabled / disabled via a keyswitch fitted
across alarm contacts PIN 1 and PIN 2. When the switch is closed
the alarm package is disabled, open the switch and the alarm
package is active. This may be used to control the alarm package.
i.e. enabled at night when the building is empty.
Note:- Cutting the switch cable will activate the alarms
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