TX-VCR Video Controlled Relay - BNC

The TXVCR 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 TXVCR to be powered from a wide variety of existing ac or dc power sources

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

Video detection is based on valid sync signals. The TXVCR responds to valid NTSC or PAL sync while ignoring 50 Hz and 60 Hz hum and related induction artifacts. The TXVCR is able to detect signals as weak as 0.5 V pp. When a valid signal is detected, the relay contacts close. Both a normallyopen and normallyclosed contact are provided, permitting the module to be connected as a videopresent detector or as a videoloss detector. The frontpanel SYNC LED lights when valid video is being detected.

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