Product picture - Meridian Technologies DigiFlex DT-4V4C2F 4C2F-5 4-Channel NTSC PAL Video, 4-Channel Bidirectional Contact Closure, and 2-Channel Bidirectional RS-422, Manchester, and Bi-Phase Data Transmitter Card Meridian, Technologies, DigiFlex, DT-4V4C2F, 4C2F-5, 4-Channel, NTSC, PAL, Video, 4-Channel, Bidirectional, Contact, Closure, 2-Channel, Bidirectional, RS-422, Manchester, Bi-Phase, Data, Transmitter, Card Click the image to close this page