ETC OneTrack by ETC - About OneTrack Backbone; Data Transmission Standards; Electrical Load Capacity

2 OneTrack and OneTrack Backbone Planning and Installation Manual
About OneTrack Backbone
OneTrack Backbone provides a robust track solution when larger fixtures are required. With
OneTrack Backbone, an aluminum housing encloses OneTrack by ETC system hardware,
providing additional strength and more robust structural attachment. A steel fixture hanger
combined with a pigtail adapter allows you to use larger, theatrical lighting fixtures in addition
to traditional track fixtures with OneTrack.
In addition to the OneTrack features described above, OneTrack Backbone offers:
• Threaded rod mounting, mounting directly to structural beams using beam clamps, or
mounting to other U-channel products using standard hardware
• Increased maximum distance between suspension points to 10 ft (3 m)
• Increased physical load capacity to 250 lb (127 kg) over 10 ft (3 m); see Suspended
Physical Load Capacity on page 10 for load capacity details
• White, black, and silver powder-coated finishes
Data
OneTrack and OneTrack Backbone provide integrated wiring for DMX-512A (ANSI E.1.11) and
bidirectional RDM (ANSI E1.20-2010) control signals. The electrical specifications of these
DMX512A and RDM standards are based on ANSI/TIA/EIA-485-A-1998.
DMX512A standards require a continuous daisy-chain data-link topology with a terminating
switch or resistor with a value of 100–120 ohms to eliminate ringing and signal reflection. No
T-junctions, Y-taps, or loops are permitted.
Wire used for bringing the DMX signal into the track system must be Belden 9729 (or
equivalent 24AWG 2pair+shield) with shield connected to ground at one end, preferably the
signal source.
Electrical Load Capacity
OneTrack and OneTrack Backbone distribute one or two 120V circuits, up to 16A on a 20A
circuit. Each circuit has an independent neutral for individual control and a common ground.
• Maximum Feed: 2x20A branch circuits
• Maximum Load: 2x16A (2x1920W at 120V)
• Supply Wiring: 12AWG feed wires (120V)
The OneTrack Backbone pigtail adapters have an electrical load capacity of 300W (120V
supply).