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The maximum distance between last devices and the Vertex is 300 m.
Comply with the device quantity limits related to:
Remember that looping of the bus is prohibited and it will cause lack of communication.
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Good practices:
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Maximum current limit
Up to 64 DALI devices can be connected to each port (55 per port is recommend). The allowed current must be not exceeded.
For example, the project includes 32 luminaires and 6 sensors. The allowed current for the Vertex 3.0 is 230 mA per one port. The current consumption for the luminaires is 2 mA and for the selected sensors is 8 mA. The total power consumption of these devices is 112 mA. It is less than the permissible limit on the bus, so it’s ok.
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Number of adresses limit
Each DALI port has 64 DALI adresses. Usually one DALI device takes up 1 DALI address. Up to 64 (55 per port is recommend) devices can be connected 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.
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Count the addresses first, not the individual devices! |
Number of sensors and panels on one bus
Sensors and panels have another limit. Up to 8 those devices per one DALI bus can be connected. 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 a total of 24 sensors and panels per one Vertex can be connected.
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