Honeywell ADEMCO VISTA-120, Installation And Setup Manual

Page: 25 / 114

Section 3 – Installing the Control
3-7
Installing Polling Loop Devices
You can expand the system from the basic 9 zones to up
to 128 zones using the built-in 2-wire polling loop.
Each device connected to the polling loop communicates
with the panel about its status. These devices are
called RPMs (Remote Point Modules).
The polling loop provides both power and data to the
RPM zones, and is constantly monitoring the status of
all zones enabled on the loop.
The maximum current drain of all devices on the
polling loop cannot total more than 128mA (unless
using a 4297 Polling Loop Extender Module).
Although each polling loop device is wired in
parallel, each device has its own unique zone
number (or group of zones). On some
devices, this is determined by the setting of
DIP switches. Other devices have a built-in
unique serial number that must be "enrolled"
into the control. Serial number mode
MUST be
used instead of DIP switch addressing mode
for devices that can be set for either mode.
All devices on the polling loop must be wired in parallel
to the [+] and [-] Polling Loop terminals of the control
panel (24 and 25, respectively). You can wire from
device to device, or have multiple branches connected
directly to the control panel in a star configuration. Be
sure to observe proper polarity.
The Quest 2260SN can be programmed as a
“Smart Contact” in
Zone Progamming. This
prevents those sensors from displaying faults
during the disarmed state. You cannot mix
“Smart Contacts” with non-“Smart Contacts” in
the system.
Compatible Polling Loop Devices
Model No. Type
998MX Serialized Dual PIR
4101SN Serialized Single-Output Relay Module
4190SN Serialized 2-Zone Expander
4190WH 2-Zone Expander
4191SN Serial Number Recessed Reed Contact
4193SN Serialized 2-Zone Expander
4208U Universal 8-Zone Expander
4275EX Dual PIR
4275EX-SN Serialized Dual PIR
4278EX Quad PIR
4278EX-SN Serialized Quad PIR
4293SN Serialized 1-Zone Expander
4297 Extender Module
4939SN-BR
4939SN-GY Serial Number Surface-Mount Reed Contacts
4959SN Serialized Aluminum Overhead Door Contact
5192SD Serialized Photoelectric Smoke Detector
5192SDT Serialized Photoelectric Smoke Detector w/Heat
Sensor
9500SN Serialized Dual Technology Glassbreak Detector
QUEST
2260SN
Serialized Dual Technology Smart Motion Sensor
To install the devices perform the following steps:
1. Run wires to each device on the polling loop using
the the following table for maximum wire runs per
wire size Twisted pair wire is recommended for all
wire runs. Maximum total wire runs combined
must not exceed 1220m regardless of wire size
(610m if shielded wire is used).
Maximum Polling Loop Wire Runs
Wire Size Max. Length
0.64 mm O.D. 198 m
0.81 mm O.D. 290 m
1.0 mm O.D. 457 m
1.3 mm O.D. 732 m
For new polling loop installations, always use
twisted pair wiring. In many cases, existing non-
twisted pair wiring may be used, but it is more
susceptible to interference from other sources,
and may be problematic in installations with
long wire runs or in high noise environments.
Always locate polling loop wiring at least 15cm
of AC power, telephone, or intercom wiring.
The polling loop carries data between the
control panel and the devices; interference on
this loop can cause an interruption of
communication. The polling loop can also
cause outgoing interference on the intercom or
phone lines. If this spacing cannot be
achieved, shielded wire must be used. (Note
that the maximum total wire length supported
is cut in half when shielded wire is used.)
2. Wire each device to the polling loop, making sure to
use correct polarity when making connections (refer
to the device's instructions).
3. Note the polling loop devices that have DIP
switches on them. Set each device's DIP switches
for the zone number you are assigning it. Refer to
the device's instructions or the DIP Switch Tables
found at the end of this manual when setting
addresses.
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 3-14. Polling Loop Connections