Honeywell VPLEX-VSI - Install Guide Dated 01/09
K9372V2 1/09 Rev. A
INSTALLATION AND SETUP GUIDE
The VPlex-VSI loop isolator provides complete short, resistive
short, and overload circuit isolation for devices on the V-Plex
polling loop of a compatible control panel. When a short or
overload occurs on a polling loop branch installed with a
VPlex-VSI, the VPlex-VSI illuminates its Trouble LED and
isolates the defective branch from the system, allowing
normal operation of the remaining V-Plex devices on other
The VPlex-VSI automatically returns to normal operation and
the Trouble LED is extinguished when the trouble condition
on the output side of the VPlex-VSI is rectified.
A control panel normally reports a short on the polling loop
as a trouble on zone 97 or 997. When using the VPlex-VSI
in a properly configured polling loop, this trouble condition
will not occur. Instead, the zones isolated by the VPlex-VSI
will report in trouble.
A few panels do not have any delay on reporting a loop
short as a trouble. On these panels, a 97 or 997 trouble will
be reported for a polling loop short. Otherwise, operation is
as described above.
For UL installations, troubles must be reported to the
Detects and isolates polling loop branches with complete or
resistive shorts, and overload or defective V-Plex devices on
initial power up, or after power and normal polling loop
signaling has been switched to its output.
Can be used on all qualified controls that support the
ADEMCO V-Plex polling loop.
Operates automatically on qualified controls without the
need for changes to existing control hardware or software.
Powered directly from the V-Plex 2-wire polling loop.
Can be placed on any major or minor branch in any
configuration on the loop.
LED indication of an isolated defective branch.
Low power consumption.
Designed to meet appropriate Regulatory Agency
To determine where VPlex-VSI units should be installed,
observe the maximums provided in “Wiring Limits” and begin
by locating a VPlex-VSI at the control panel for every major
branch of the polling loop or immediately following a
V-Plex polling loop extender. Then, locate a VPlex-VSI at the
start of every minor branch containing devices to be isolated
from the rest of the loop in the event of a short or overload
condition occurring on that minor branch. Typical loop
configurations are shown in Figure 1.
V-Plex FIRE DEVICES
FIGURE 1: TYPICAL V-Plex POLLING LOOP CONFIGURATIONS
K9372V2 1/09 Rev. A
For best detection and isolation of powered-on shorts,
defective devices, or overloads, the maximum distance
between a VPlex-VSI and the V-Plex devices located farthest
from the VPlex-VSI should be kept within the following wired
Cable Length, maximum
(Shielded or Unshielded)
The VPlex-VSI does not add to the maximum length of any
branch or the maximum sum length of all branches as listed in your
control panel manual. When a conflict occurs, the shorter length should
be considered as the maximum.
MOUNTING AND WIRING
The VPlex-VSI is designed to be surface mounted to a flat
interior wall or to a single-gang electrical box. Wiring lengths
should not exceed the values provided under “Wiring Limits.”
All circuits are supervised and power-limited.
All power-limited wiring must be separated from non-
power limited and high-voltage wiring by 1
Refer to the control panel installation instructions for
programming / installation requirements.
Follow the instructions below when mounting and wiring the
1. Open the module’s cover by inserting and twisting a
screwdriver blade in the slot at the center of the cover’s
lower edge (see Figure 2).
2. Pass the two wires (coming from the direction of the
control) through the opening in the case back and make
connections to the module’s + and – IN terminal block
screws (see Figure 3).
3. Pass the two wires (extending out toward the end of the
loop) through the opening in the case back and make
connections to the module’s + and – OUT terminal block
screws (see Figure 3).
4. Mount the module to the wall or electrical box using self-
tapping screws as shown in Figure 4. (Screws not supplied)
5. Close the module’s cover.
FIGURE 2: OPENING THE COVER
OF POLLING LOOP
FIGURE 3: CONNECTING THE VPlex-VSI
FIGURE 4: MOUNTING THE VPlex-VSI
-10C to +55C
0 – 95% non condensing
8.0 - 11VDC
1.2ma (LED off);
5.0ma (LED on).
Compatible with maximum V-Plex polling
loop current for all VISTA panels.
< 10 ohms
Resistive Short Detection
(10 – 400) ohms during normal polling;
(10 – 800) ohms at application of polling
Loop voltage level: < 6.0 VDC
Total VPlex-VSI modules
(in tandem and/or parallel -
No limit. However, allow 1.2ma per
4.135” (10.5cm) long x 2.56” (6.5cm)
wide x 0.87” (2.21cm) thick
For the latest warranty information, please go to:
2 Corporate Center Drive, Suite 100
P.O. Box 9040, Melville, NY 11747
2009 Honeywell International Inc.