System supervision
2 - 4 • • • Intelli-FLEX II product guide
Damaged or defective components
A defect or cut in the sensor cable, non-sensitive feed cable, cable splice or
terminator will cause a supervision alarm.
If the terminator device is defective or damaged the supervision current will
fluctuate, causing a supervision alarm.
Power fail
A voltage sensor monitors the internal 12 volt line and signals the system if the DC
voltage is too low. If the DC voltage drops, but remains above the low DC
threshold, the system will generate a power fail supervision alarm in both zones.
The system will maintain normal zone alarm detection capabilities while in this
condition.
Low DC voltage shutdown
When the DC voltage on the internal 12 volt line drops below the voltage
required to operate the system reliably (8 VDC), a low DC voltage condition
occurs. When this happens, the alarm and supervision relays for both zones
activate and the entire system shuts down. Once the DC voltage on the 12 volt
line increases to at least 11 VDC, the condition will clear and the system will
resume operation.
Tamper
The Intelli-FLEX II system uses a solid-state sensor to detect if the enclosure door
is open.
A magnet is mounted on a standoff on the enclosure door. The magnet must be
close to the tamper sensor located on the processor for the tamper alarm to be
deactivated. When the enclosure door is opened the magnet is moved away from
the sensor. This action causes a supervision alarm to occur in the zones that are
connected to the processor. The system will maintain normal zone alarm
detection capabilities while in this alarm condition.
Refer to
Appendix a - Troubleshooting, Tamper Supervision
for instructions on
clearing tamper alarms.
