Lighting Control Interfaces: Phase, 0–10 V and DALI
Compare phase-control, 0–10 V, DALI, and switched lighting interfaces, identify driver and control markings, and check the documented product combination.
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Interface comparison
A luminaire can have a mains input, an LED output circuit, and a separate control interface. Identify which part a label describes before choosing or connecting a control.
| Approach | How the command is conveyed | Compatibility questions |
|---|---|---|
| Switched on/off | The documented supply or control input is switched | Load type, switching/inrush ratings, and the actual wiring method. |
| Forward-phase control | Part of the supply waveform is controlled by the dimmer | Driver/lamp compatibility, dimming range, minimum load, and control ratings. |
| Reverse-phase control | A different phase-cut waveform approach | Do not assume a forward-phase-only load accepts it; read both product specifications. |
| 0–10 V analog | A separate analog signal sets the documented output level | Source/sink behavior, control-current limits, polarity, off behavior, and power switching. |
| DALI digital | Digital commands communicate over a documented control bus | Controller, control gear, bus supply, addressing, supported functions, and commissioning. |
| Manufacturer-specific digital interface | A defined product/system protocol | Do not assume the same two terminals or wire count means DALI or 0–10 V. |
Read driver and control labels
Record the exact driver, fixture, controller/dimmer, supply rating, LED output rating, and control designation. A dimmable LED output is not by itself a statement that the mains input accepts any dimmer.
Check which controls source a signal, sink current, or provide a digital bus. These are functional distinctions, not choices that can be determined only by a conductor color. For 0–10 V, read the specific off/switching behavior and polarity requirements; do not assume 0 V always creates the required off state.
Separate power and control
Check the documented combination
- Match the exact control type to the driver or lamp’s stated interface.
- Check rated load, minimum/maximum quantity, inrush, control current, supply configuration, and any required neutral.
- Check wiring class/separation, bus supply, polarity where applicable, cable limits, and environmental conditions from the exact instructions.
- Verify dimming range, off behavior, flicker, emergency/backup operation, and commissioning requirements using the approved project method.
This guide compares interfaces; it does not promise product interoperability or replace a compatibility list. For a device record use the job card. Fixture quantity and layout remain in the existing lighting calculator.