Figure 3-14: Polling Loop Connections To The Vista-128Bpt/Vista-250Bpt - Honeywell VISTA-128BPT Installation And Setup Manual

VISTA-128BPT/VISTA-250BPT Installation and Setup Guide
•
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 6 inches (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.)
No more than 64mA may be drawn on any individual wire run.
IMPORTANT NOTE: If the installation needs to exceed or deviate from these parameters, refer to the application note on
the Honeywell website for additional polling loop wiring configurations. To access the application note:
1. Go to the honeywell.com/security website
2. Click the Honeywell Security & Communications link.
3. Click the Commercial link.
4. Click the Documentation link.
5. Click the V-Plex Application Note.
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.
4 Run wires from the control panel to each device on the polling loop (see Figure 3-14).
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.

Figure 3-14: Polling Loop Connections to the VISTA-128BPT/VISTA-250BPT

3-12
21 22 23
POLLING LOOP RATING:
128mA MAXIMUM
24 25
+ -
4208U
TO RIGHT LOOP
5193SD
SMOKE
4190SN