ADEMCO VISTA-250FBP Setup Guide download pdf (Page 37)

Section 3 - Installing the Control

3-15

2k EOLR

TAMPER

SWITCH

SENSOR

Figure 3-14: Wiring a Normally Open Sensor Loop for Tamper Supervision

Installing V-Plex Devices

The polling loop provides both power and data to the Vplex devices, and is constantly monitoring the status of all zones

enabled on the loop. The maximum current draw of all devices on the polling loop cannot total more than 128mA (unless

the system uses a 4297 Polling Loop Extender Module).

Devices that can be programmed via either DIP switches or the built-in unique serial number must be set for serial

number mode operation.

All devices on the polling loop must be wired in parallel to the [+] and [-] polling loop terminals of the control panel (28

and 29). You can wire from device to device, or have multiple branches connected directly to the control panel in a star

configuration. If a module is using optional aux power, do not connect the [ - ] polling loop terminal to the device. Use

the ground from the power source.

1. Do not run polling loop wires within 6” of AC power, telephone, or intercom wiring. The polling loop is carrying

data between the control panel and the devices, interference on this loop can cause an interruption of this

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. The Quest 2260SN can be programmed as a “Smart Contact” in

Zone Programming

. This prevents those PIRs

from displaying faults during the disarmed state. You cannot mix Quest 2260SN “Smart Contacts” with non-

“Smart Contacts” in the system.

3. Twisted-pair is recommended for all wire runs.

4. No more than 64mA may be drawn on any individual wire run.

5. When a star configuration is used, the total length of all wire runs combined cannot exceed 4000 ft (2000 ft. if

you are using unshielded wire in conduit or shielded wire).

• The 4190SN right loop must not be used, and the left loop must be EOLR-supervised.

• The 4297 must be powered from the VISTA-128FBP/VISTA-250FBP Auxiliary Power Output.

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ADEMCO VISTA-250FBP Setup Guide Page 37