User Manual

Network architecture
DALI architecture (FLN)
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Structure
A DALI system can be made up of control gear, control devices and bus power
supplies.
Control gear usually contains the power control circuit to drive lamps, or some
other type of output, such as on/off switching or 1 to 10 V analog signals.
Control devices can provide information to other control devices, such as light
intensity information, and can send commands to control gear. Input devices
are a type or a part of a control device that provides some information to the
system, such as a button press or movement detection. DALI application
controllers are also control devices, e.g., they can send commands to control
gear to modify the lighting.
At least one bus power supply must be present in a DALI system. This is
necessary to allow both communications on the bus, and to power any bus-
powered devices. The bus power supply does not need to be a separate unit – it
could be part of another device such as a LED driver or a sensor.
A DALI system also includes the bus wires that are used to connect the DALI
terminals of the various devices in the system.
DALI allows the flexible addressing of devices.
At the simplest level, all devices are addressed simultaneously by broadcast
commands. This allows the control of lighting in a similar manner to 1 to 10 V
analog control, without requiring any configuration of the individual devices. If a
level (Direct Arc Power Command) is broadcast, then all control gear will act
upon that command, changing their output to the same new level.
With simple configuration, DALI devices can be given one of 64 short-
addresses. This allows individual control, configuration and querying of any
single device in the system.
DALI devices can also be group addressed, e.g., a DALI LED driver could be
programmed to be in any combination of the 16 available groups. When a
command is sent to a group, only devices that are in that group are addressed.
System devices
The PXC3…A automation stations have a DALI bus for connecting up to 64
DALI ballasts/drivers.
The PXC3.E16A room automation station is optimized for lighting applications.
It has an onboard DALI interface for connecting up to 64 electronic ballasts or
LED drivers
Control gear
Control devices
Bus power supplies
Bus wires
Addressing
PXC3...A
PXC3.E16A