Signal cabling
DMX cable: three or five pins and end-of-line termination
Choose DMX cable from the ports and the complete route, not length alone. This guide covers the physical connection between control and fixtures; addressing, fixture mode, and patch need a separate review.
Record both ends, including adapters
CHAUVET’s DMX Primer illustrates three- and five-pin XLR links, connecting DATA OUT to DATA IN. Check each device manual and the accessory’s documented contact mapping before choosing an adapter.
| Point | Record | Confirm |
|---|---|---|
| Start | Controller, port, and first cable | Cable part number and connector |
| Intermediate points | Fixture order, IN / OUT, and accessories | Continuous route without improvised branches |
| End | Last device on each line | Compatible termination and documented position |
Data cable and termination have different jobs
ETC calls for DMX-rated cable, a daisy chain without passive Y splits, and 120 Ω termination across the data pair at the line end. Select a compatible commercial terminator or the device’s documented internal termination; do not improvise a connection.
- Keep DMX and microphone cables distinct in labels and orders.
- Record each three- to five-pin transition. Pin count alone does not establish universe count or additional functions.
- If branches are needed, request a suitable distribution design. A Y cable cannot establish its selection or configuration.
Prepare a run that can be checked in sections
For moving fixtures or effects, arrange testing with the movement area clear. A cable check does not authorize firing effects or working on electrical power.
- List the controller, devices, ports, and physical order. Measure each run along the approved path, including slack and protected crossings.
- Record cable part number, length, and connectors; check cable and device documentation. The DMX name does not establish a universal maximum reach.
- Label both ends of each section and mark each line end. Keep strain off connections and avoid unprotected traffic areas.
- Arrange a check with the intended devices before rehearsal. Record each change and its result; a short-cable test does not validate the full run.
Compare lengths and accessories as an assembly
One direct run reduces joints; several sections may accommodate position changes but add points to identify and inspect. Compare both options against the route and setup access. Length-specific listings help specify each piece; the line map explains how they connect.
- Prepare a spare with the correct cable and connectors, not merely a similar length.
- Set aside accessories with uncertain identification until checked.
- Keep a record of the route actually installed.
Setup questions
If it works without a terminator, does that prove one is unnecessary?
No. One result does not establish the link’s operating margin. Review the line end against the system documentation and check the complete configuration.
Does a three- to five-pin adapter convert the protocol?
No. It provides a physical transition only when its contact mapping is suitable. It does not turn audio into DMX or confirm extra-pin functions.
Will replacing the cable fix every flicker?
No. Record affected fixtures, their position in the run, and settings. Review routing and termination, then arrange section-by-section checks using a suitable verified cable. If the issue remains, review mode and patch with the system operator.
Sources and documentation
- ETC — DMX512 (aka DMX) Info · Official documentation
- CHAUVET DJ — DMX Primer · Official documentation