Accenta/Optima Engineer’s Manual
12
Important Notes
1. Each output has been configured as active low.
2. Where the communicator is powered from an external source, not the panel and the outputs are being
used without relays, the panel and external power supply will require a common negative supply rail.
3. If the communicator is not fitted inside the panel and abort is being used, care should be taken to ensure
that the abort connection cannot be damaged or severed as this could cause the ARC to incorrectly
filter an alarm signal.
4. It is very important that communicating systems are fully tested and that all signals are correctly received
at the ARC when the system is installed and serviced.
Filtering of Intruder alarms
The exact method of filtering should be decided according to the security services / keyholder requirements
and ARC procedures.
In general, the panels offer the following methods that could be used to filter an alarm.
Set/Unset A Set or Unset signal which is received by the ARC at around the same time as an intruder signal
can be used to filter the alarm.
Abort Output The abort output operates whenever a user code is entered to switch off an intruder alarm
condition. When an abort signal is received by ARC at or around the same time as an intruder signal, the alarm
can be filtered.
Restore of the Intruder Output The intruder alarm output is restored to 12V whenever a user code is
entered to switch off an intruder alarm condition. Where an intruder alarm is shortly followed by a restore at
the ARC, this can be used to filter the alarm.
Remote Signalling (cont’d)
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