Section 7 - 2-Wire Polling Loop Expansion
7-5
4190
RPM
4278
PIR
Polling loop rating:
128mA maximum.
POLLING LOOP
21
22
23
24
25
+
-
4192SD
SMOKE
TO RIGHT LOOP
Figure 7-1: Polling Loop Connections to the VISTA-50PEN
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 7-2 and 7-3, to follow.
DO NOT use the 4197 Polling Loop Extender module with the VISTA-50PEN
.
CONTROL
PANEL
4297
MODULE
Notes: - Do not use the 4197 module.
- Refer to 4297 instructions for more detailed installation information.
The limits shown below supercede the limits described in the 4297 instructions.
- Do not connect 4297 modules in series.
- - -
RPM
- - -
Input Polling Loop
Extension Polling Loop
RPM
RPM
RPM
Extension Loop Limits:
- Same as for the input polling loop.
Input Loop Limits:
- 128mA max. No more than 64mA
on any individual wire run.
- No individual wire run may exceed:
Gauge Length
#22
#20
#18
#16
650 ft.
950 ft.
1500 ft.
2400 ft.
- Total length of all wire runs combined cannot
exceed 4000 ft. (2000 ft. if using unshielded
wire in conduit or shielded wire).
Combined Input and Extension Polling Loop Limits:
- No more than 119 devices combined.
- Total length of all wire runs on all loops combined can-
not exceed 6400 ft. (3200 ft. if using unshielded wire in
conduit or shielded wire)
Figure 7-2: Polling Loop Connections Using One 4297 Extender Module
Summary of Contents for VISTA-50PEN
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Page 10: ...VISTA 50PEN Installation and Setup Guide x...
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Page 197: ...B 1 A P P E N D I X B DIP Switch Tables...
Page 200: ...VISTA 50PEN Installation and Setup Guide B 4...
Page 214: ...l K3271 1BX 9 00 165 Eileen Way Syosset NY 11791 Copyright 2000 PITTWAY Corporation...