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Products: RP-C, RP-C-EXT-DALI-M-PD
Functionalities: Hardware
Product version: 2022

DALI Inputs/Outputs with Power Distribution


The DALI light modules have four DALI inputs/outputs, which are designed for control and power supply of DALI light control gear such as lights with electronic ballasts, LED drivers, and other control gear with DALI interface as well as connection of DALI input devices such as sensors and push-buttons.

The four DALI inputs/outputs are labeled Light 1 to Light 4.

The DALI inputs/outputs support:

  • DALI lighting control

  • Power distribution (230 VAC)

action_zoom_plus_stroke DALI inputs/outputs with power distribution

DALI inputs/outputs with power distribution

DALI lighting control

The four DALI inputs/outputs share one logical DALI channel.

The 5-pole DALI input/output connector has two terminals for DALI lighting control:

  • DA+

  • DA-

These two terminals are where the wires from the DALI bus are connected. The DALI bus is a 2-wire bus, which is used for bi-directional communication. For more information, see Wire Sizes and Lengths .

The DALI light module monitors and controls the DALI control gear and input devices on the DALI bus. Each DALI control gear device is assigned a unique short address, which is used when communicating with the individual device on the bus. The DALI control gear and input devices can be arranged into up to 16 groups. Each device can be a member of any combination of the 16 groups. For example, a group can be used to change all LED drivers in a room from Off to On.

Up to 32 DALI control gear devices can be connected to the DALI light module. The maximum number of control gear devices per module and per DALI input/output is also determined by the module's power distribution limitations. For more information, see section “Specifications”.

Up to 16 DALI input devices in total can be connected to the DALI light module. Each input device supports up to four sensors or buttons.

Power distribution

The power distribution capability means that the module distributes the AC mains voltage (230 VAC) from the Power Input to the control gear connected to the four DALI inputs/outputs.

The 5-pole DALI input/output connector has three terminals for power distribution:

  • N (Neutral)

  • PE (Protective earth ground)

  • L (Line)

The DALI light module uses a relay to control the power distribution to each DALI input/output, by connecting or disconnecting the AC mains voltage to the output (L terminal). In the figure above, the relay is named K1 for the Light 1 output, K2 for the Light 2 output, and so on.

In the event of a power outage, the relays are set in a predefined state so that the AC mains voltage is connected to the four DALI inputs/outputs. The relays will remain in that state at startup after a power outage.

The module's AC mains voltage side and low-voltage side (SELV side) are galvanically separated by means of isolation circuitry.

The module also has energy metering circuitry that supports the measurement of the energy consumption for the total load connected to the module. For more information, see RP Controller Expansion Module Energy Metering .


4, Light 1 to Light 4
The four inputs/outputs share one DALI channel.
Input/output terminals
N, PE, L, DA+, and DA-
DALI bus voltage
18 VDC
Maximum supply current
250 mA
Guaranteed supply current
64 mA
Power distribution
230 VAC (same voltage as power supply)
Maximum 5 A load per output
Maximum 10 A total load for the 4 outputs
Maximum 165 A inrush current (<20 ms) per output
Maximum 800 A inrush current (<200 µs) per output
  • RP Controller Expansion Modules
  • Light Modules
  • Wire Sizes and Lengths
  • RP Controller Expansion Module Pluggable Connectors
  • RP Controller Expansion Module Energy Metering