Installation and User Manual
ADPRO Presidium by Xtralis
36
Doc. 12384_05
Figure 26: Alarm and Isolate Input Configuration
3.7
Isolation
Isolation inputs are provided for each video channel:
ALM Isolate A
and
ALM Isolate B
. These
connections allow individual channels to be isolated (prevented from generating an alarm). This
feature is useful in a number of scenarios:
•
Commissioning a Presidium
•
Fault finding an installation
•
Configuring detectors
•
Disabling faulty detectors
Both the alarm input and alarm isolate connections are tamper protected (regardless of the
access/secure state).
To ensure the best immunity to EMC disturbances, the isolation input should be wired using
shielded cable. Connect the shield to the ground (GND) terminal.
Note:
If a channel is isolated, no alarm input or tamper alarm will be generated.
The Isolate input state may be:
•
Normally Open -
No End Of Line (NEOL) Resistor
•
Normally Closed
•
Normally Open SEOL -
Single End Of Line Resistor
•
Normally Closed SEOL
•
Normally Open DEOL -
Dual End Of Line Resistor
•
Normally Closed DEOL
.
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