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VISTA-40 Installation and Setup Guide
3-12
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 97 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.
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
RPM
INPUT POLLING LOOP
EXTENSION POLLING LOOP
RPM
4297
RPM
RPM
TO
OTHER
RPMS
EXTENSION POLLING LOOP LIMITS = SAME AS INPUT LOOP
INPUT LOOP LIMITS:
•
TOTAL LENGTH OF ALL WIRE RUNS COMBINED CANNOT
EXCEED 5200FT. (2600FT. IF USING UNSHIELDED WIRE).
GAUGE LENGTH
#22 650 FT
#20 950 FT
#18 1500 FT
#16 2400 FT
• NO MORE THAN 55 DEVICES COMBINED.
• TOTAL LENGTH OF ALL WIRE RUNS ON BOTH LOOPS
COMBINED CANNOT EXCEED 5200 FT. (2600 FT. IF
USING UNSHIELDED WIRE IN CONDUIT, OR IF USING
SHIELDED WIRE).
polling_loop_011-V0
COMBINED INPUT AND EXTENSION LOOP LIMITS:
• 64 mA MAX. LIMIT CURRENT TO 64mA ON ANY
INDIVIDUAL WIRE RUN.
• NO MORE THAN 55 DEVICES MAY BE USED.
NO INDIVIDUAL WIRE RUN CAN EXCEED:
•
Figure 3-17: Polling Loop Connections Using One 4297 Extender Module
CONTROL PANEL
EXTENSION POLLING LOOP #1
4297
RPM
COMBINED INPUT AND EXTENSION LOOP LIMITS:
•
NO MORE THAN 55 DEVICES COMBINED ON THE INPUT LOOP AND EXTENSION
LOOP #1. NO MORE THAN 55 DEVICES COMBINED ON THE INPUT LOOP AND
EXTENSION LOOP #2.
• TOTAL LENGTH OF ALL WIRE RUNS ON THE INPUT LOOP AND EXTENSION LOOP #1
COMBINED CANNOT EXCEED 5200 FT. (2600 FT. IF USING UNSHIELDED WIRE IN
CONDUIT, OR SHIELDED WIRE). TOTAL LENGTH OF ALL WIRE RUNS ON THE INPUT
LOOP AND EXTENSION LOOP #2 COMBINED CANNOT EXCEED 5200 FT. (2600 FT. IF
USING UNSHIELDED WIRE IN CONDUIT, OR SHIELDED WIRE).
4297
RPM
INPUT POLLING LOOP
•
DO NOT CONNECT 4297 MODULES IN
SERIES (i.e., DO NOT CONNECT ONE
MODULE'S EXTENSION LOOP TO
ANOTHER MODULE'S INPUT LOOP.)
polling_loop-010-V0
EXTENSION POLLING LOOP #2
Figure 3-18: Polling Loop Connections Using Multiple Extender Modules
NOTE: The input loop limits stated in Figure 3-17 apply to Figure 3-18 as well.