Description:
Video Balun Combiner for twisted pair up to
750 feet (228 meters) in conventional UTP applications,
100 meters in TIA/EIA 568 applications.
The VB31AT is a unique transmission device which provides
an economical means of sending video and camera
power over a standard Category cables. Video is
sent over one pair and camera power is sent over the
two of the remaining pairs. A mini-coax pigtail with male
BNC is used on the VB31AT. A pair of wires are provided
for power power connection. Connections to the
Category cable are made via an RJ45 connector.
The
VB31AT Video Balun provides the same high immunity
to noise and interference as all of the Nitek baluns.
This simplified wiring scheme provides a convenient
method of powering the camera, allowing for quicker
and easier installations. The RJ45 modular jack uses
standard 568B wiring so spare network cables can be
used.
U.S. Patent No. 7,193,149
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Features:
- Superior video over ordinary twisted pair cable
- Immunity to noise and interference
- Lifetime warranty
- Built-in surge suppression
- Passive devices - do not require power
- Convenient connection to Category cables for video
and power
- Easier to install than coax
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Transceiver Unit
| Size w/mounting tabs |
0.9"H x 1.0"W x 2.0"D |
| Power Requirements |
NONE REQUIRED |
| Power Pass Through |
250mA @ 1,000 feet on 24 AWG
1 Amp @ 100 feet on 24 AWG |
| Video Input |
1 vpp composite video
monochrome or color |
| Output |
Balanced low voltage current loop |
| Modular Jack |
Standard RJ45 |
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System (2 Transceivers Required)
| Video Format |
RS170, NTSC, PAL, SECAM,
CCIR (Color or B/W) |
| Video Input |
1 vpp composite video
monochrome or color |
| Operating Frequency |
DC to 10 MHz |
Common Mode
Rejection |
>60 dB typ. |
| Temperature Range |
0 degrees C to +85 degrees C |
| Humidity Range |
0 to 98%, non-condensing |
| Twisted Pair Connection |
RJ45 modular connector |
| Transient Immunity |
Built-in |
| Wire Spec |
24 to 22 AWG unshielded
twisted pair (UTP) |
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DC Loop Resistance |
51 Ohms/1,000 feet (max)
(51 Ohms/304 meters) |
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Normal Capacitance |
17pF/ft. |
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Impedence |
100 Ohms +/- 20% |
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UTP Category |
2 or better |
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Applications:
- Intra-building CCTV installations (instead of coaxial cable)
- Structured cabling environments
- Multi-camera applications through conduit (more cameras through a smaller diameter)
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SYSTEM COMPONENTS
Two video balun combiner devices (VB43 or WB42 - in any
combination) are required for transmission over a Category 5 cable
to provide video, RS422 and power using the RJ45 modular
connectors.
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Wire and Cable Recommendations
The VB31AT is recommended for use with unshielded twisted
pair (UTP) wiring. The system will operate over wire gauges
from 24 AWG through 22 AWG. Individually shielded pairs
should be avoided, as they drastically reduce the operating
range of the systems. Multi-pair cable (25-pair or more) with
an overall shield are acceptable. Video can be operated in the
same communication cable coexistent with telephone, computer,
control signals, power voltages and other video signals.
While video may be routed through telephone punch-down
block terminals, any bridge-taps, also called T-taps and any
resistive, capacitive or inductive devices MUST BE removed
from the pair. For more specific information regarding wire
types, gauges and proper installation techniques, please call
(800) 528-4343 for technical assistance.
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