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Siemens Desigo Desigo Room automation - Engineering, mounting and installation CM111043en_13

Smart Infrastrructure DALI network 2020-04-30

14 DALI network

· The DALI network allows the PXC3 room automation station to a maximum 64

DALI operational devices.

· The DALI network comprises one cable and two stranded bus wires. The mains

power may also be available in the same cable (L, N, PE).

· The PXC3 possesses a DALI bus supply of 128mA to power up to 64 DALI

operational devices.

Detailed information is available on the DALI homepage at www.dali-ag.org.

14.1 Bus power supply

A bus power supply is required for bus communications.

PXC3 room automation stations each have switchable (via the ABT) bus supply of

16 V / 128 mA. They are switched on at the factory.

· Parallel operation with an external power supply is NOT permitted.

· An external power supply cannot be connected if the internal power supply is

switched off.

· Power consumption of all operational devices on the DALI circuit may not

exceed 128 mA (64 x 2 mA).

14.2 Bus topologies

Up to 64 DALI operational devices may be installed on one DALI circuit. No

restrictions apply to the type mix.

Permissible bus topologies are: Tree, line, and star topologies. These topologies

can be mixed as needed. However, ring topologies are not allowed.

Tree topology (with stub lines) Line topology (with loops)

N2 N2

N1 N3 N4 N1 N4

N7 N3

DALIDALI

11043z13

N1 .. N7 Operational devices

Additional information

Supply is compulsory

Power consumption

PXC3

Notes

64 operational devices

in a circuit

Permissible bus

topologies