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NVT INSTRUCTIONS
UNSHIELDED TWISTED PAIR
VIDEO WIRING
NOTE:
The customer must purchase the Video Transceiver from
NVT. Part numbers are:
• NV-212A (500 ft.)
* NV-213A or NV-213A-M (1000 ft.)
• NV-652R, NV-862R, or NV-1662R (3000 ft.)
The cameras included in the Q-View™ series have the option of
transmitting video signals to NVT receivers via unshielded twisted
pair cable. You must purchase the receiver separately. Instructions for
connecting the receiver end of the the unshielded twisted pair cable
will be included with the NVT receiver. Following are instructions for
connecting the unshielded twisted pair cables to the RJ45 (Cat. 5)
cable running outside your housing.
1. Video for all four cameras is contained in the one RJ45 (Cat. 5)
cable. An RJ45 female coupling is provided so that all connections
can be made with an RJ45 connector. The following is the wiring
diagram for the four twisted pair wires that are included with the
Cat. 5 cable.
PIN WIRE COLOR CAMERA NUMBER
1 White/Green Camera 1 +
2 Green Camera 1 -
3 White/Orange Camera 2 +
6 Orange Camera 2 -
5 White/Blue Camera 3 +
4 Blue Camera 3 -
7 White/Brown Camera 4 +
8 Brown Camera 4 -
2. Connect the other end of the unshielded twisted pair cable to the
NVT receiver.
CAUTION:
The unshielded twisted pair video signal is polarity
dependent. The positive video wire for each camera
MUST be connnected to the postitive terminal on the
NVT receiver, and negative MUST be connected to
negative.
3. When using unshielded twisted pair cable you DO NOT need the
BNC connector. All four BNC connectors are provided inside the
housing for testing purposes. Be sure that there is no video con-
nection other than the unshielded twisted pair cable.
Wiring Notes
Wire — What to
DO
1.
DO
use point-to-point Unshielded Twisted Pair wire, gauge 24 or
thicker, stranded or solid, Category 2, 3, 4, or 5.
2. The video signal may co-exist in the same wire bundle as other
video, telephone, data, control signals, or low-voltage power. It
is also OK to run NVT video signals in or near electromagnetic
fields (in accordance with National Electrical Code, local, or other
local safety requirements).
3.
DO
measure the wire distance. Use only transceivers that are
designed for that distance.
4.
DO
make sure the pair of wires carrying the video signal is sent
as a twisted pair
(e.g. the blue-white/white-blue wires twisted
together as a pair), not a “split-pair” (e.g. blue-white conductor,
part of one pair/orange-white conductor, part of another pair).
Wire — What NOT to DO
1.
DO NOT USE SHIELDED TWISTED PAIR WIRE.
It will severely
degrade the distance performance. Short runs may be used with
some signal degradation (for example elevator traveler cables).
Multi-pair wire with an overall shield is OK.
2.
DO NOT USE UN-TWISTED WIRE.
It will reduce the NVT
product’s inherent interference immunity.
3.
DO NOT
allow your installation to have “bridge-taps”, loading
coils, talk-battery, or MOV type protectors. Bridge-taps are where
a twisted pair is connected to two twisted pairs (such as an
extension phone at home). Bridge-taps cause reflections as the
signal propagates, resulting in “ghosts” in the video image, and
are to be avoided.
4. If the phone company is providing the cable runs between
buildings, make sure it’s “dry copper” i.e. it should have none
of the following: dial-tone, 48 volts, loading coils, bridge-taps,
switching, or long paths to the phone company’s central office
and back.
5. Due to near-end crosstalk,
DO NOT
send a transmit and a
receive signal in the same wire bundle. Exceptions: Less than
1,000 ft (300m), or Category 5 cable, up to 2,000 ft (600m) are
OK.
6.
DO NOT
send “Up-the-Coax” Pan/Tilt/Zoom signals through
active (amplified) NVT transceivers.
Measure your wire distance
Note: All NVT quoted distance specifications include any coax in the
run. It is recommended that the wire distance be measured to ensure
that the capability of the NVT product is correct.
Wire resistance may be measured with an ohm-meter by shorting
the two conductors together at the far end, and measuring the loop-
resistance out and back. Compare your readings with the charts on
the next page.
7. For safety, never put NVT signals in the same conduit as
high-voltage wiring.
8.
WARNING
— to reduce a risk of fire or electrical shock, do
not expose this product to rain or moisture.
COMPLETION OF INSTALLATION
When the desired focus is achieved for each camera, adjust the
segmented bracket arms to the desired viewing angle. Once you've
fi nished, put the dome back in place and check to be sure none of the
cameras touch the dome. If one or more do, readjust the arm(s) until
they are clear of the dome.
