Modular four channel active UTP video card

Model Number: TR515x4

  • Unshielded Twisted Pair (UTP) transmission up to 1,500 feet (450 meters)
  • Unit for Modular Twisted Pair Video System

The TR515x4 is designed for use with the modular rack system. The system holds up to ten (10) modular cards, in any combination, using the RK400 card cage (not included). This modular plug-in feature allows the system to be custom configured for each application and provides easy expandability.

The TR515x4 is designed for operation over Category 2, 3, 4 or 5 twisted pair cable. The system works equally well over existing communication and computer network spare pairs or new cable installations. A highly balanced transmitter output design assures that the system will not interfere with other equipment on the network. Advanced receiver electronics provide complete immunity from ground loop, hum and noise to produce maximum video quality with minimum loss.

A DIP switch on the receiver unit provides incremental adjustment of gain and frequency compensation to allow the system to be fine-tuned for an existing cable. This unique feature provides adjustment for optimum performance over the entire operating range and also allows cable length to be estimated with a wide safety margin. The TR515x4 includes only the receiver card.

  • Active electronics compensate for frequency and level loss
  • Built-in protection from power surge, transients, static or other electrical interference
  • High resolution color or monochrome video
  • Complete immunity to ground loop; video and AC can be run in a common raceway, where code allows
  • Video detect LEDs for each receiver
  • RJ45 or push terminals for easy connection


  • Elevators - making traveling coax unnecessary
  • High Rise Buildings - between floors
  • Detention Facilities - using existing twisted pairs
  • Campus Facilities - where running coax or fiber is difficult and expensive


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

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 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.

 Transceiver Unit
Size 1 card slot
Power Requirements Card powered by modular rack
Input (4) Balenced low voltage current loop
Output (4) 1vpp composite video monochrome or color
Common Mode Rejection >70dB
Transient Immunity Built-in
Shipping Weight 1 lb
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:

TR515X4 Specification Sheet
TR515X4 Installation Manual
TR515X4 A&E Specification
TR515X4 A&E Specification
TR515X4 Visio Drawing
TR515X4 Autocad Drawing