Nitek VH3251 - Manual

Note: This installation should be made by a
qualified service person and conform with local
codes.
Specifications
VH3200 System includes the following:
(1) VH3200 Hub
(1) Wall power transformer
Size
1.75”H x 19”W x 10”D Input Low voltage current loop from
balanced UTP transmitters
Power Requirements 24VAC, 800mA Output-Video 1.0vpp composite video
Monochrome or Color
Model VH3200
UTP Modular Hub
Installation and
Operation Manual
Rev 021111
NITEK
®
Europe Office:
De Schans 19-21 2a, 8231 KA Lelystad
The Netherlands
Tel: +31(0)320-230005
Fax: +31(0)320-282186
E-mail: [email protected]
WWW.NITEK.NL USA Office:
5410 Newport Drive, Rolling Meadows, IL 60008
Phone: (800) 528-4343
Fax: (847) 259-1300
E-mail: [email protected]
WWW.NITEK.NET
680540101
Reduce risk of fire or electrical shock. Do not
expose this product to rain or moisture. !
Installation
The VH3200 UTP modular hub is designed to operate with a mix of Nitek UTP video cards either active or passive.
If you are using pre-existing wire or are not sure of the distance you are going the following wire tests are highly
recommended.
Checking the Wire
1. Loop Resistance - Short one end and check the resistance between the wires at the other end. This will give
you the loop resistance and wire distance (See Chart).
2. Open Loop - Open the shorted end and check for infinity at the other end.
3. Short or Leakage to Ground - With both ends open check each wire to earth ground. The reading should be
infinity or megohms.
4. No Voltage on Wires - With both wires open check for DC or AC, other than stray AC, on the wires.
For distances greater than 3,000 feet an amplified transmit source may be needed.
Wire
Gage
500
(150)
1000
(300)
2000
(600)
3000
(900)
4000
(1200)
5000
(1500)
6000
(1800)
22 16 32 64 97 129 161 194
24 26 51 103 154 205 257 308
26 41 82 163 245 326 408 490
Distance in Feet (Meters)
Connecting the Hub
If using the unit as a receiver, connect the twisted pair from the camera end to the screw terminals on the back,
make sure of the polarity of the connection. If the wires are reversed the video will be unviewable on the monitor.
Connect the matching BNC to your video system as needed.
If using the unit as a transmitter, connect your video source to the BNC and connect the twisted pairs leading to
your monitor end to the matching screw terminals. Note the polarity of your connections.