Scintillement DMX512 et erreurs de données

Diagnostic de terminaison, splitters et topologie de façade.

Cause technique

DMX physical lines use daisy-chain routing. Passive Y/star branches are replaced by active splitter outputs, each treated as a new line with far-end termination [S1].

Cas de 72 luminaires

Scenario: 72 fixtures across four facade wings become four isolated branches of 18 daisy-chained fixtures. Exact cable length, unit load, RDM and grounding remain project approval items.

Tests et limites

• Terminate the physical far end, not every fixture.
• Keep stubs short [S2–S3].
• Test one branch at a time.
• Technical reviewer: 待确认.

Sources

1. ESTA DMX512-A Guide
2. TI RS-485 Design Guide
3. Analog Devices AN-727
4. LIKELIGHT DMX product reference

Author: LikeLight Tom, Operations. Evidence reviewed August 21, 2026.