ADEMCO VISTA-128B Guide d'installation télécharger pdf (Page 51)

Section 7 - 2-Wire Polling Loop Expansion

7-5

Polling Loop Supervision

A short on the polling loop is indicated by a trouble on its supervisory zone

and reports as a trouble condition only. As such, a polling loop should be assigned zone type

05 if annunciation as a trouble condition is desired.

If a device on the polling loop fails (the panel cannot "see" that device), the partition or

partitions that use that device will display a trouble condition for all zones associated with

that device. If the panel is armed when a device fails, the zones associated with that device

will cause an alarm on the corresponding partition(s).

A trouble on zone 997 will not prevent a partition from being armed, as long as all polling loop

zones on that partition are bypassed.

Checkout Procedure for Polling Loop Zones

After installation of all polling loop zones is complete, each partition of the security system

should be checked as follows:

Be sure that all devices and sensors connected to the polling loop are not in a faulted

state. Doors and windows with contacts should be closed, PIRs should be covered (use a

cloth to mask them temporarily, if necessary).

With all hardwired and polling loop zones intact, the alpha keypads connected to the

system should display:

DISARMED

READY TO ARM.

If the keypad(s) begins beeping and display the word "CHECK" or "TRBL", along with a

zone or zone numbers, the system either does not see the displayed zone(s) or the

tamper switches are tripped. Please check your DIP switch settings for the zone(s), your

connections, and/or that the covers for units with tamper switches are in place. Once the

situation has been corrected, enter the [User Code] + [OFF] sequence twice to clear the

trouble.

If the following is displayed, press the [*] key to display the faulted zone(s):

DISARMED Press

✴

to show faults

Restore any faulted zone(s) as necessary. When the “DISARMED...READY TO ARM”

message is displayed, you can proceed to the next step.

Fault and then restore every contact or sensor on each zone individually to ensure that it

is being monitored by the system. Each time a zone is faulted, the keypads in the

partition to which the zone is assigned should display the number of the faulted zone.

Tripping fire and panic zones will cause external sounders to sound and may

trigger the dialer. When each zone is restored, the “READY TO ARM” message should

appear again.

If a zone or zones are not displayed at the correct partition's keypad(s), check both keypad and

zone programming to verify the correct partition assignment.

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ADEMCO VISTA-128B Guide d'installation Page 51

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