A tenth physical DIP switch is not automatically a tenth DMX address bit. Before setting it, check whether your fixture assigns it a binary weight, an operating mode, or another function.
Binary capacity and DMX limits are different
| Binary address bits | Patterns | Direct numeric range | What this establishes |
|---|---|---|---|
| 8 | 256 | 0–255 | Capacity of eight binary bits |
| 9 | 512 | 0–511 | Capacity of nine binary bits |
| 10 | 1024 | 0–1023 | Capacity of ten binary bits |
DMX start addresses use channels 1–512 within a universe. The physical switch bank may use direct values, an offset, reserved combinations, or separate mode controls. Ten-bit mathematical capacity does not expand a DMX universe to 1023 channels.
How to identify switch 10
- Find the manual for the exact fixture model and revision.
- Look for an address-weight table. A tenth address bit would have weight 512 in direct binary encoding.
- Read the operating-mode table separately. A switch may select DMX, automatic, or sound-controlled operation instead of adding to the address.
- Check whether mode selection uses a combination of switches rather than one switch alone.
- Follow the documented procedure for activating the setting.
For example, ADJ’s FAQ describes fixture-specific combinations involving switches 9 and 10. This is why an address-only calculator cannot determine the correct operating mode for every fixture.
Worked comparison: address 100
With the direct weights SW1 = 1 through SW9 = 256, address 100 is 64 + 32 + 4. Its ON address switches are SW7, SW6, and SW3. The nine-bit binary value is 001100100.
If switch 10 is documented as a mode selector, set it according to the mode table rather than the binary total. If the manual documents an offset, apply that offset exactly as stated. Do not add 1 to every calculated address: direct encoding of 100 is 100, not 101.
What about address 512?
Nine direct binary address bits stop at 511. A device’s special handling of 512 must be documented. Turning on a tenth switch only represents 512 if the manufacturer actually assigns it that address weight.
The fixture’s channel footprint also matters: its last channel must fit within 512. A 16-channel fixture’s highest valid start is 497. See the nine-bit address reference for a detailed example.
Multiple universes do not extend DIP address weights
A universe is selected through the controller, node, interface, or other routing configuration. A fixture’s local start address still refers to channels within that universe. Use the DMX universe address converter for numbering and verify routing separately.
Choose the right calculator
- DMX DIP switch calculator: directly weighted ON/OFF address patterns.
- DMX patch planner: start addresses and channel footprints.
- 10-position binary calculator: mathematical values 0–1023, without assuming a DMX device mapping.