Alpha VBV-4 Installation Manual

VBV-4 Video Data Distributor Unit

Installation and Use Instructions

Used with the S.T.R.™ Series

NoCoax Video-Intercoms for systems

with multiple video risers/lines

APPLICATION

The VBV-4 video distributor unit is designed to be used with the
S.T.R.™ NoCoax video-intercom system(s) to provide multiple
video risers (lines) from a single camera video source. Each
VBV-4 provides up to four (4) amplified video data outputs and
a 5th output that may be used to daisy-chain to an additional
VBV-4 unit (if required). Each VBV-4 is powered by a separate
model NG20 15VDC power supply.

PROCEDURE

1 . Read installation instructions to determine equipment lo-

cation and installation method.
2 . Install equipment and wiring.
3 . Check wiring and connect. Observe all local and

national electrical and building codes.

4. Apply power and check operation.

HOUSING INSTALLATION AND

EQUIPMENT LOCATION

VBV-4 VIDEO DISTRIBUTOR
The VBV-4 is usually located in the 'central equipment location'
where the VCU309 system amplifier/power supply is located.
You can mount the VBV-4 by using the provided plastic 'Din
Rail' mounting bracket. It must be located away from any source
of direct heat or extreme cold and in an accessible location. Keep
at least 3 feet (1 meter) away from transformers, light dimmers
or other electrical devices or wiring or sources of electrical
interference.

POWER SUPPLY
The model NG20 (or equivalent) 15VDC power supply plugs
into a conventional 117 VAC electrical outlet, using a separate
cord and plug, within 100' (30 meters) of the VBV-4, but no closer
than 3 feet (1 meter) from the VBV-4 unit.

WIRING

Run 2 conductor #18AWG from the 15VDC power source to
each VBV-4 video distributor. If distance is greater than 100
feet (30 meters), use #16AWG cable. Use a separate cable from
the video-intercom cables, and route away from any other
cables. Before connecting, make certain wires are free from
shorts or grounds. Make connections as shown on following
page and as detailed in the following instructions.

FINISH INSTALLATION

1 . Install VBV-4. Do not overtighten screws.

2. Install amplifier and accessory devices as needed.
3 . Plug NG20 power supply into outlet. Observe all local and

national electrical and building codes.

4 . Make sure all coaxial connections are connected properly

and no braid wires are touching or shorting to the center
conductors of the coaxial cables between the camera(s)
and the KBS-1 adaptor(s).

NOTE: The Alpha Communications

system is installed or used in any manner other than described
in this manual.

®

warranty is void if this

TROUBLESHOOTING

If the VBV-4 fails to operate as indicated in these instructions,
check the following points:

1. NO VIDEO OUTPUTS AT ALL: Check for 15VDC

power at each VBV-4 video distributor; and for 117 VAC
at power supply primary. Green LED on each VBV-4 should
be illuminated.

2. PROBLEMS WITH INDIVIDUAL VIDEO DATA
OUTPUT(S): Temporarily move cables from output (1-

4) that is not functioning, to one that is functioning
properly, to see if it is the VBV-4 output cable(s) that are
not functioning properly.

NOTE: POLARITY MUST BE OBSERVED. Terminal 'B' is
positive (+) and terminal 'O' is negative (-), at all VBV-4
connections! Each additional VBV-4 should be powered by a
separate NG20 (or equivalent) power supply.

Copyright© 2004, Alpha Communications®, All Rights Reserved.

If these checkpoints fail to indicate the problem,
there may be an equipment fault. Contact the
factory or qualified service representative.

AWD095 Rev. 2 (11/04)

TYPICAL WIRING LAYOUT DIAGRAM SHOWN FOR ONE (1)

VBV-4 VIDEO DISTRIBUTOR UNIT, WITH FIRST FOUR

(4) VIDEO DATA OUTPUT RISERS (LINES).

MAXIMUM OF 10 VIDEO MONITORS ON EACH

VIDEO DATA OUTPUT OR 300' (90 METERS) OF CABLE

NOTE: A 100-ohm resistor
MUST be used on the
LAST output when no more
VBV-4's are connected!!

*

NOTE: OBSERVE
POLARITY ON ALL
'Y' AND 'Z'
TERMINALS

Notes:

1. Wiring to 15VDC input power should be #18AWG unless shown otherwise. If any wire run exceeds 100 feet
(30 meters) use #16AWG in place of the #18AWG.

2. Observe all local and national electrical and building codes.

3. All terminals and connections shown may not be in the order that they appear on the equipment.

4.

See also the wiring information on page 1 for more wiring details.

*

ALPHA COMMUNICATIONS® • 42 Central Drive • Farmingdale NY 11735-1202

TOLL-FREE TECHNICAL LINE 1-800-666-4800 • Phone: [phone] • Fax: [phone]

INTERNET WEBSITE: http://www.alpha-comm.com • EMAIL: [e-mail]

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