DMX: an address is not a fixture number

One universe

A DMX universe has 512 control channels. A fixture occupies as many consecutive channels as its selected mode requires. Its start address says where that block begins.

An eight-channel example

An eight-channel fixture starting at 1 uses 1–8. The next can start at 9. If the mode changes to 16 channels, recheck the patch. The console personality must match the fixture mode.

Try it before setup

The tool shows consecutive addresses for identical fixtures in one universe. It does not know an existing patch or the permitted receiver count on the physical line; check those separately.

Prepare these details

Matching console and fixture modeChannels per fixtureAddresses within 1–512

Your discussion-preparation list. Checking items is not a technical inspection or approval for use. Stored only in this browser.

Explore the principle

Give each fixture its own space

A sequential patch of identical fixtures in one universe. Existing assignments are not included.

Start addressChannels per fixtureFixture count

Check fixture mode and personality, plus physical-line limits. This tool does not add another universe.

1–48channel range

Two more useful answers

Can two fixtures share an address?

They can receive the same channels, but matching-mode fixtures then lack independent control.

Does RDM automatically resolve overlaps?

Do not assume so. Changing mode through RDM can increase the footprint.

Sources and further reading

Editorial summary · checked 11 September 2026. International guidance provides technical context, not a statement of Croatian regulations. Current instructions for the exact model take precedence.