Document Number:
VB31M |
Model
| VB31M |
Video Balun Transceiver for Twisted Pair |
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up to 750 feet (152 meters) with Passive Transceivers |
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up to 3,000 feet (914 meters) with Active Receivers |
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Revision Number:
011608 |
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Description:
Video balun with pigtail coax and male BNC for
operation with other baluns or active receivers.
The VB31M video balun is a video transmission device
which converts coaxial signals into UTP signals. The
unit provides a low cost means of sending live video
over unshielded twisted pair, point-to-point wiring for
distances of up to 750 feet (152 meters) with other passive
baluns, up to 1,500 feet (457 meters) with TR515 single
channel and model 51 series hubs, and up to 3,000 feet
(914 meters) with TR560 and model 56 series hubs.
The VB31M is compatible with all of the “up-the-coax”
control systems. A basic system uses (2) video balun
transceivers, one at each end of a twisted pair of wires.
These units are intended for use over existing in-house
telephone wiring, Category 5 wiring or other twisted
pair cable runs to provide a convenient, cost-effective
alternative to coax. The VB31M is designed to provide
superior immunity from noise and interference even when
running next to line power! The VB31M also provides a
unique mounting tab and strain relief.
Features:
- RJ45 jack connection for twisted pair
- Quality video over ordinary twisted pair cable
- Immunity to noise and interference
- Passive devices - do not require power
- Mini-coax pigtail for in-camera or dome mounting
- Weather resistant design
- Easier to install than coax
- Compatible with all twisted pair equipped cameras,
enclosures and domes
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Transceiver Unit
| Size |
0.9"H x 1.0"W x 2.0"D (not including coax) |
| Power Requirements |
NONE REQUIRED |
| Input |
1 vpp composite video
monochrome or color |
| Output |
Balanced low voltage current loop |
| Shipping Weight |
1 lbs for single unit |
|
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 |
-10 degrees C to +85 degrees C |
| Humidity Range |
0 to 98%, non-condensing |
| Twisted Pair Connection |
RJ45 jack |
| Wire Spec |
26 to 22 AWG unshielded
twisted pair (UTP) |
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DC Loop Resistance |
51 Ohms/1,000 ft (max)
(51 Ohms/304 meters) |
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Normal Capacitance |
17pF/ft. |
| |
Impedence |
100 Ohms +/- 20% |
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UTP Category |
2 or better |
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Wire and Cable Recommendations
The VB31M is recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG. Category 2, 3, 4 or 5 cable may be used. Individually shielded pairs should be avoided, as they drastically reduce the operating range of the systems. Multi-pair cable with an overall shield is 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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Product Specifications |
Adobe .PDF |
Word .DOC |
CAD |
| VB31M spec |
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Applications:
- Intra-building CCTV installations (instead of coaxial cable)
- Structured cabling (Cat wiring) environments
- To eliminate requirement for Plenum Coax
- Multi-camera applications through conduit (more cameras through a smaller diameter)
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| PART |
DESCRIPTION |
| VB31M |
9" Pigtail with Male BNC Connector;
up to 750 feet (152 meters). |
| VB31PT works with the following equipment |
| VB37M |
BNC Male Video Balun; up to 750 feet (228 meters) |
| VB37F |
BNC Female Video Balun; up to 750 feet (228 meters) |
| VB39M |
BNC Male Video Balun w/ surge suppression;
up to 750 feet (228 meters) |
| VB39F |
BNC Female Video Balun w/ surge suppression;
up to 750 feet (228 meters) |
| TR515 |
BNC Female Video Balun w/ surge suppression;
up to 750 feet (228 meters) |
| TR560 |
Active Receiver w/ surge suppression;
up to 3,000 feet (914 meters) |
| VB41x4 |
4 Balun Card w/ surge suppression for Rack;
up to 750 feet (228 meters) |
| TR515x4 |
Active Receiver w/ surge suppression for Rack;
up to 1,500 feet (457 meters) |
| TR560x4 |
Active Receiver w/ surge suppression for Rack;
up to 3,000 feet (914 meters) |
| VH439 |
4 Port UTP Video Balun Mini-Hub w/ surge suppression; up to 750 feet (228 meters) |
| VH839 |
8 Port UTP Video Balun Hub w/ surge suppression; up to 750 feet (228 meters) |
| VH1639 |
16 Port UTP Video Balun Hub w/ surge suppression; up to 750 feet (228 meters) |
| VH3239 |
32 Port UTP Video Balun Hub w/ surge suppression; up to 750 feet (228 meters) |
| VH451 |
4 Port UTP Video Balun Mini-Hub w/ surge suppression; up to 1,500 feet (457 meters) |
| VH851 |
8 Port Active Receiver Hub w/ surge suppression; up to 1,500 feet (457 meters) |
| VH1651 |
16 Port Active Receiver Hub w/ surge suppression; up to1,500 feet (457 meters) |
| VH3251 |
32 Port Active Receiver Hub w/ surge suppression; up to 1,500 feet (457 meters) |
| VH456 |
4 Port UTP Video Balun Mini-Hub w/ surge suppression; up to 1,500 feet (457 meters) |
| VH856 |
8 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters) |
| VH1656 |
16 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters) |
| VH3256 |
32 Port Active UTP Receiver Hub w/ surge suppression; up to 3,000 feet (914 meters) |
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SYSTEM COMPONENTS
Two VB31M devices or one VB31M in combination with any
of the other Nitek transceiver or active receiver models are
required for transmission over a single UTP.
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