ADEMCO VISTA-128B Setup Guide Page 92

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VISTA-128B Installation Instructions
15-2
Alarm Output Supervision
When supervision is enabled, the panel monitors the alarm output wiring for open and short
circuit faults while the output is inactive. The VISTA-128B will provide a trouble indication
(Zone 970) when there is an open circuit in the alarm output wiring that disconnects all
indicating devices from the panel, or when there is a short circuit between the Bell (+)
and Bell (-) terminal wiring, (or between the Bell (+) terminal wiring and earth ground
provided that the panel's earth ground terminal #30 is connected to a proper earth ground).
The VISTA-128B will indicate a trouble condition regardless of whether the system is armed
or disarmed. The supervisory zone will display on the keypads, report to the event log, and
transmit to the central station (if programmed), on Partition 1. The Contact ID event code is
321, Bell Trouble.
To use the supervision feature, do the following:
Wire polarized fire-indicating devices to the alarm output as shown in Figure 15-1.
Wire nonpolarized burglary indicating devices to the alarm output using a polarizing
diode (two 2A diodes supplied), as shown in Figure 15-2.
Program Zone 970 with a response type of 05 (trouble by day/alarm by night). See Zone
Programming in the #93 Menu Mode.
The minimum load on the alarm output must exceed 5mA at 12V for proper supervision operation.
If a device such as a siren driver with a high resistance trigger input (drawing less than
5mA) is being used, do the following:
Cut the blue jumper on the upper left-hand corner of the panel's PC Board.
Program Zone 970 with a response type of 00 (no response). See Zone Programming in
the #93 Menu Mode.
Mount the siren driver in the panel's cabinet.
U
L
If a device such as a siren driver with a high resistance trigger input (drawing less than
5mA) is being used in a UL household fire installation, the siren driver must independently
supervise siren speaker wiring.
To disable the supervision feature, do the following:
Cut the blue jumper on the upper left-hand corner of the panel's PC Board.
Program Zone 970 with a response type of 00 (no response). See Zone Programming in
the #93 Menu Mode.
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