Broadcast vs addressable DALI: a retrofit wiring strategy
Choosing between broadcast-only and individually addressed DALI control is a commissioning decision, not just a wiring one. This is a practical decision framework for retrofit projects where zoning and budget both matter.
Deciding between broadcast and addressed control
Assess the zoning need
If every device on the line can reasonably respond together, broadcast-only control needs the least commissioning time and suits simple retrofits with coarse zoning.
Weigh the commissioning effort
Group or individual addressing costs more commissioning time but unlocks per-fixture status, fault reporting and fine-grained scenes — worth it where zoning is fine-grained.
Wire the line broadcast-capable from day one
A common retrofit pattern is installing the 2-wire DALI bus ready for full addressing even if only broadcast control is commissioned initially.
Upgrade addressing later without rewiring
Moving from broadcast to individual or group addressing on an existing line is a commissioning-software change — the physical bus wiring does not need to change.
What this retrofit strategy delivers
Upgrade addressing without touching the cable
Moving from broadcast to individual/group addressing on an existing DALI line is a commissioning-software change — the physical 2-wire bus wiring does not need to change.
Broadcast control for fast retrofits
Every device on the line responds together, minimising commissioning time where coarse zoning is acceptable.
Group or individual addressing for precision
Costs more commissioning effort but delivers per-fixture status, fault reporting and fine-grained scene control.
Wire once, commission twice if needed
Installing the bus broadcast-capable from day one keeps the door open to full addressing later without touching the cable run.
Addressing is software, not wiring
The DALI 2-wire bus supports both control modes on the same physical run — the addressing model is set in commissioning software.
Fits the standard DALI/IEC 62386 line
Whichever mode you choose, the line still supports up to 64 individually addressed devices, 16 groups and 16 scenes.
What a retrofit wiring strategy review covers
A practical decision pass before you commission
- Zoning requirement assessment
- Broadcast vs group/individual addressing comparison
- Commissioning effort and cost estimate
- Broadcast-capable wiring recommendation
- Future upgrade path to full addressing
Frequently asked questions
When does broadcast-only DALI control make sense?
When every device on the line can reasonably respond together and zoning is coarse — it needs the least commissioning time and suits simple retrofits.
What do I gain from individual or group addressing?
Per-fixture status, fault reporting and fine-grained scenes — at the cost of more commissioning time than broadcast-only control.
Can I upgrade from broadcast to addressed control later?
Yes. Moving from broadcast to individual or group addressing on an existing DALI line is a commissioning-software change — the physical 2-wire bus wiring does not need to change.
Should I wire for addressing even if I only need broadcast now?
It's a common retrofit pattern: wiring the DALI line broadcast-capable from day one keeps the option to add full addressing later without rewiring.
Does the device limit change between broadcast and addressed modes?
No. The underlying DALI line still supports up to 64 individually addressed devices grouped into up to 16 groups with up to 16 scenes, regardless of which control mode is commissioned.
Planning a DALI retrofit wiring strategy?
Contact our engineers to weigh broadcast vs addressable control against your zoning needs and commissioning budget.