NITEK CCTV Video Balun VB37M/VB39M

Model

VB37M	Video Balun Transceiver for Twisted Pairup to 750 feet (225 meters)
VB39M	Video Balun Transceivers with Surge Protection for Twisted Pair up to 750 feet (225 meters)

Description:

Video balun transceivers for twisted pair up to 750 feet (225 meters). Two types are available. The basic VB37 model and the VB39 with built-in surge suppression for added equipment protection. Video balun transceiver is a video transmission device that provides a low cost means of sending live video over unshielded twisted pair, point-to-point wiring for distances of up to 750 feet (225 meters). The VB37 and VB39 are compatible with all of the “up-the-coax” control systems. A basic system uses (2) VB37 or (2) VB39 units, 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 VB37 and VB39 are designed to provide superior immunity from noise and interference even when running next to line power!

Features:

Quality video over ordinary twisted pair cable
Built-in surge suppression
Built-in ground loop isolation (When used with an active receiver)
DIP switches for accurate gain and loss control
High immunity to noise and interference
LED’s to indicate video detection
Highly compact, only one rack unit in height
Easy to install and configure
Video can be run in the same cable with telephone, computer signals and power

Transceiver Unit
Size	1.3" (H) x 2.0" (W) x .95" (D)
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 8 lbs for a case (44 units per case)
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	-40 degrees C to +85 degrees C
Humidity Range	0 to 98%, non-condensing
Transient Immunity	6,000 V 1.2uS x 50 uS per ANSI / IEE 587 C62.41 B3 3,000 A 8uS x 20 uS when ground screw terminal is connected to earth-ground
Enclosure Material	Black ABS flame retardant plastic
Twisted Pair Connection	Screw terminals
Wire Spec	26 to 12 AWG Unshielded Twisted Pair (UTP)
DC Loop Resistance	51 Ohms/1,000 feet (max) (51 Ohms/300 meters)
Normal Capacitance	17pF/ft.
Impedence	100 Ohms +/- 20%
UTP Category	2 or better

Product Drawing

VB37 CCTV Video Balun

Product Specifications

VB37M Spec Sheet	VB37M A&E Spec	VB37M dwg
VB37M A&E Spec	--	VB37M Visio
VB37M Manual	--	--
--	--	--
VB39M Spec Sheet	VB39M A&E Spec	VB39M dwg
VB39M A&E Spec	--	VB39M Visio
VB39M Manual	--	--

Applications:

Intra-building CCTV installations (instead of coaxial cable)
Structured cabling (Category 5) environments
To eliminate requirement for Plenum Coax
Multi-camera applications through conduit (more cameras through a smaller diameter)

SYSTEM COMPONENTS

Two VB37 devices M or F in any combination are required for transmission over a single UTP.

Wire and Cable Recommendations

The VB37 and VB39 are 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.

System Drawings

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