VISTA-128BP/VISTA-250BP Installation and Setup Guide
3-12
To install polling loop devices, perform the following
steps:
Step Action
1 Select devices from the list of compatible
devices shown previously.
2 Set the DIP switches in the device (if
required). Refer to the device’s instructions.
3 Mount each device in the desired location.
Refer to the device’s instructions.
Run wires from the control panel to each
device on the polling loop (see Figure 3-16).
No individual wire run may exceed the
lengths shown in the following table.
Maximum Polling Loop Wire Runs
Wire Gauge Max. Length
#22 gauge 650 feet
#20 gauge 950 feet
#18 gauge 1500 feet
#16 gauge 2400 feet
4
5 Wire each device to the polling loop, making
sure of the correct polarity (refer to the
device’s instructions).
NOTE: If you are using serial number
devices, and intend to enroll each device
through the keypad automatically, wire no
more than 25 of these devices to the
control at a time. Then power up and
program them before connecting the next
25. Leave previously enrolled devices
connected.
If you intend to manually enter the serial
numbers via the keypad or the Compass
downloading software, all the devices may
be connected before powering up to
program.
POLLING LOOP RATING:
128mA MAXIMUM
4192SD
SMOKE
4190
RPM
4278
PIR
23
21
22
+
-
POLLING LOOP
25
24
TO RIGHT LOOP
poll_loop-001-V0
Figure 3-16: Polling Loop Connections to the
VISTA-128BP/VISTA-250BP
Polling Loop Supervision
A short on the polling loop is indicated by a trouble on
zone 997 and reports as a trouble condition only. If
annunciation is desired, program the zone as type 05.
If a device on the polling loop fails (the panel cannot
"see" that device), the system displays a trouble
condition for all zones on that device. If the panel is
armed when a device fails, and the zone is a burglary
zone, the will go into alarm
A trouble on zone 997 prevents a partition
from being armed, unless all polling loop zones
on that partition are bypassed.
Using the 4297 Polling Loop Extender
The 4297 Polling Loop Extender may be used to
provide additional polling loop current, to extend the
polling loop wire run length, and/or to provide
individual electrically isolated polling loops. Refer to
Figures 3-17 and 3-18, to follow.
DO NOT use the 4197 Polling Loop Extender
module with the VISTA-128BP/VISTA-250BP
.
Be sure to include the total current drawn on
the polling loop when figuring the total auxiliary
load on the panel’s power supply.
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