8 Channel Active Balun Hub

UTP Active Video Receiver Hub -

8 Ports

Model Number: VH856

  • Eight Active Video Balun Receivers for UTP
  • Up to 3,000 feet (900 meters) with Passive Transmitters
  • Screw Terminal Blocks provide connection to UTP cable
  • The VH856 is an 8 or 16 port active video hubs with dual outputs, built-in surge suppression, ground loop isolation, gain/loss control, and video detection. Systems operate with other Nitek UTP video equipment including, video transceiver hubs, standard video balun transceivers, active transmitters, or any twisted pair equipped camera.

    Multi-channel video receiver hubs provide excellent video quality through two video outputs per channel. Twisted pair installations are made with a choice of the standard screw terminal connections, or the modular jack connections featured on the M series. The VH856 can be used on video runs up to 3,000 feet (900 meters) when used with passive transmitters, or distances of up to 6,000 feet (1,800 meters) with the Nitek TT560 active transmitter. These hubs provide superior immunity from noise and interference, even when run in common raceways with AC power.

    • Quality video over ordinary twisted pair cable
    • Built-in surge suppression
    • Built-in ground loop isolation
    • Dual BNC connector output
    • RJ45 jack connector input
    • Convenient access to DIP switches for accurate gain and loss control
    • High immunity to noise and interference
    • LEDs to indicate video detection
    • Highly compact, only one rack unit in height
    • Video can be run in the same cable with telephone, computer signals and power

    Wire and Cable Recommendations

    Twisted Sender is recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG but are optimized for 24 AWG. Category cabling 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.

     Unit Specifications
    Size 1 RU x 6.0"D
    Power Requirements 12 to 24 VAC/VDC @ 450mA
    (Wall transformer provided with unit)
    Video Input Balanced low voltage current loop
    Video Output 1 Vpp composite video
    monochrome or color
    Common Mode Rejection >70dB
    Video Format RS170, NTSC, PAL, SECAM,
    CCIR (Color or B/W)
    Twisted Pair Connection Screw terminals providing balanced low voltage current loop
    Output Connection Dual BNC Connectors
    Wire Size 26 to 12 AWG Unshielded Twisted Pair
    Operating Frequency DC to 10 MHz
    Transmission Distance
    Up to 3,000 feet (900 meters) w/passive baluns
    Up to 6,000 feet (1,800 meters) w/active transmitters
    Transient Immunity Built-in
    Temperature Range -20 degrees C to +55 degrees C
    Humidity Range 0 to 98% non-condensing
    Enclosure Type Standard 19" rack 1 RU in height
    Shipping Weight 8 lbs
    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.
    Impedance 100 Ohms +/- 20%
    UTP Category 2 or better

    Select a type of online documentation:

    VH856 Specification Sheet
    VH856 Installation Manual
    VH856 A&E Specification
    VH856 A&E Specification
    VH856 Visio Drawing
    VH856 Autocad Drawing