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You need to map the DALI devices (luminaires, sensors and panels) to the individual Vertex buses (ports). The order in which devices are connected on the bus does not matter.

Important are the following rules:

  1. The maximum distance between last devices and the Vertex is 300 m.

  2. Comply with the device quantity limits related to:

    1. maximum current,

    2. number of addresses,

    3. number of sensors and panels on one bus.

  3. Remember that looping of the bus is prohibited and it will cause lack of communication.

Vertex has 3 DALI ports and each port has 2 inputs. So if you put Vertex in the middle of the devices line you can double the distance between them to 600 m.

Good practices:

  • Do not fill entire buses. It is good to leave a reserve. No more than 55 devices on one bus.

  • If possible, distribute devices evenly over the buses (not all on one).

  • If possible, give luminaires from one group on the same bus. This will make subsequent programming easier.

Maximum current limit

On each port, you can connect up to 64 DALI devices (we recommend 55) but you must not exceed the allowed current.

For example, we have 32 luminaires and 6 sensors and we use Vertex 2.0 which has allowed current 180 mA per one port. The current consumption for the luminaires is 2 mA and we have sensors which the maximum current consumption is 8 mA. The total power consumption of these devices is 112 mA. This is less than the permissible limit on the bus, so it’s ok.

Number of adresses limit

Each DALI port has 64 DALI adresses. Usually one DALI device takes up 1 DALI address so we could connect up to 64 (we recomend 55) devices to one port. But there are some luminaires that take up more than one DALI address and relay units that can take up 4 or even 8 addresses. Information about the total number of DALI drivers is in the luminaire datasheet.

Count the addresses first, not the individual devices!

Number of sensors and panels on one bus

Sensors and panels have another limit. We should connect up to 8 those devices per one DALI bus. This restriction does not apply to luminares. There can be both sensors and panels on one bus, and of course luminaires. Remember that Vertex has 3 DALI ports, so we can connect a total of 24 sensors and panels per one Vertex.

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