Figure 3-15: Polling Loop Connections Using One 4297 Extender Module; Figure 3-16: Polling Loop Connections Using Multiple Extender Modules - Honeywell VISTA-128BPT Installation And Setup Manual

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 system 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 3-15 and 3-16, to follow.
DO NOT use the 4197 Polling Loop Extender module with the VISTA-128BPT/VISTA-250BPT.
Be sure to include the total current drawn on the polling loop when figuring the total auxiliary load on the panel's
power supply.
CONTROL PANEL
INPUT LOOP LIMITS:
• 128 mA MAX. LIMIT CURRENT TO 64mA ON ANY
INDIVIDUAL WIRE RUN.
• NO MORE THAN 64 DEVICES MAY BE USED.
• NO INDIVIDUAL WIRE RUN CAN EXCEED:
GAUGE
#22
#20
#18
#16

Figure 3-15: Polling Loop Connections Using One 4297 Extender Module

• DO NOT CONNECT 4297 MODULES IN
SERIES (i.e., DO NOT CONNECT ONE
MODULE'S EXTENSION LOOP TO
ANOTHER MODULE'S INPUT LOOP.)
CONTROL PANEL
COMBINED INPUT AND EXTENSION LOOP LIMITS:
• NO MORE THAN 119 DEVICES COMBINED ON THE INPUT LOOP AND EXTENSION
LOOP #1. NO MORE THAN 119 DEVICES COMBINED ON THE INPUT LOOP AND
EXTENSION LOOP #2.

Figure 3-16: Polling Loop Connections Using Multiple Extender Modules

NOTE: The input loop limits stated in Figure 3-15 apply to Figure 3-16 as well.
INPUT POLLING LOOP
V-PLEX V-PLEX
LENGTH
650 FT
950 FT
1500 FT
2400 FT
INPUT POLLING LOOP
Section 3 – Installing the Control
EXTENSION POLLING LOOP
4297
V-PLEX
EXTENSION POLLING LOOP LIMITS = SAME AS INPUT LOOP
COMBINED INPUT AND EXTENSION LOOP LIMITS:
• NO MORE THAN 119 DEVICES COMBINED.
EXTENSION POLLING LOOP #1
4297
EXTENSION POLLING LOOP #2
4297
TO
OTHER
V-PLEX
V-PLEX
DEVICES
polling_loop_001-V0_BPT
V-PLEX
V-PLEX
polling_loop-002-V0_BPT
3-13