Video Controlled Relay - BNC

  • Detect Video Presence
  • Detect Loss of Video
  • Bridging or Terminated Operation
  • Detection of NTSC or PAL Signals
  • Dry-Contact Outputs
  • Operation from AC or DC Power
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The TX-VCR is the ideal choice in installations where a control signal is needed based on the absence or presence of valid video signals. The unique power supply input allows the TX-VCR to be powered from a wide variety of existing ac or dc power sources

    The TX-VCR has one video INPUT and a LOOP OUT video jack. The detection circuit bridges a 1V video line. The TX-VCR may be inserted in a video line with the loop-through video output feeding a terminated load. It may alternatively be installed at the end of a video line by installing a 75 Ω terminator to the LOOP OUT video jack. The terminator is supplied with the TX-VCR.

    Video detection is based on valid sync signals. The TX-VCR responds to valid NTSC or PAL sync while ignoring 50 Hz and 60 Hz hum and related induction artifacts. The TX-VCR is able to detect signals as weak as 0.5 V p-p. When a valid signal is detected, the relay contacts close. Both a normally-open and normally-closed contact are provided, permitting the module to be connected as a video-present detector or as a video-loss detector. The front-panel SYNC LED lights when valid video is being detected.

    If a local or remote loss of video audible alert is needed, the TX-VCR may be wired to an RDL BZR.


    Input:BNC, ground-referenced
    Input Level:0.5 V p-p video to 1 V p-p video
    Output:LOOP OUT, BNC, ground-referenced (Output must be terminated with 75 Ω connected load or with 75 Ω terminator supplied)
    Control Output:N/O or N/C relay contacts
    Ambient Operating Environment:0° C to 55° C
    Relay Contacts:Single-pole/double-throw
    Maximum Switching Power:60 W (220 Vdc, 125 Vac, 2A)
    Power Requirement:GROUND-REFERENCED, 12 to 33 Vdc or 12 to 24 Vac, @ 75 mA
    Dimensions:Height: 1.4 in 3.6 cm; Length: 3.0 in 7.6 cm; Width: 1.2 in 3.0 cm
    Package Type:Cardboard Box
    WEEE weight:0.24 lbs.
    Shipping Weight:0.325 lbs.
    Tariff code:8543.70.9860
    Package Dimensions:2 x 2 x 4 in.

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    CAD FilesUnitsFormat
    Engineering Functional BlockAmericanDXF
    Panel Diagram - FrontAmericanDXF
    Panel Diagram - FrontMetricDXF
    High Res ImagesFormat
    Declaration of Conformity

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