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:
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The maximum distance between last devices and the Vertex is 300 m.
Comply with the device quantity limits related to:
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When preparing the design make a sure to create an overview.
Prepare a simple schematic diagram or a list of devices for the system in each area/room.
Based on the design limits fill each port with devices. Having rooms close together in one bus makes the installation easier.
For each controller create a list of devices: luminaires, emergency, sensors and panels. Assign a naming system to devices (we suggest the one shown below).
E2D design guidelines:
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Remember that looping of the bus is prohibited and it will cause lack of communication.
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DALI bus length
The maximum distance between the last device and the Vertex controller is 300 m.
Vertex has 3 DALI ports and each port has 2 inputs
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, so put Vertex in the middle of the
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device's line to double the distance between them to 600 m.
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Good practices:
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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.
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Maximum current value limit
Up to 64 DALI devices can be connected to each bus (55 per bus is the maximum we recommend).
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For each bus the total current value must be not exceeded. |
For example, the project includes 42 luminaires and 8 sensors on one bus. The permissible current for the Vertex 3 is 230 mA* per port. The current consumption for the luminaires is 2 mA, and
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for the selected sensors, the maximum current consumption is
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18 mA. The total power consumption of these devices is
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228 mA.
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It is less than the permissible limit on the bus, so it’s ok.
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Number of adresses limit
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*The total current value for the Vertex 3 is 230 mA per bus, but for the Vertex 2, it's 180 mA. |
DALI address limit
64 DALI devices can be connected to each DALI bus. We recommend 55 devices per bus.
Usually, one DALI device takes up 1
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address
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. However, there are some luminaires that
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use more than one DALI address and other devices such as relay units that can
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use 4 or even 8 addresses. Information about the total number of DALI
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addresses can be found in the
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device datasheet.
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Count the addresses |
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, not the individual devices! |
Number of sensors and panels on one bus
Sensors and panels have
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a different limit.
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Up to 8 of those devices can be connected per one DALI bus. This restriction does not apply to
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luminaires. There can be both sensors and panels on one bus, and, of course, luminaires. Remember that Vertex controller has 3 DALI ports, so
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a total of 24 sensors and panels per one Vertex
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can be connected. Do not exceed the recommended total number of devices on one bus (55).
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This restriction applies to both Vertex 2 and Vertex 3. |
DALI bus topology
Remember that looping of the bus is not allowed and it will cause system failure. Use only the permitted DALI bus topologies described below.
The good bus topologies are tree, star and line.
DALI bus looping is not allowed.
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Good practices:
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