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

Smart Infrastrructure DALI network 2020-04-30

14.4 Technical data DALI

Transmission medium (bus cable) TP (twisted pair)

Baud rate 1.2 kbps

Bus line polarity DA, DA (interchangeable)

Bus terminating resistor Not required

The communication signal (information) is transferred symmetrically, i.e., as

voltage difference between the two bus lines (and not as a voltage difference to the

ground potential). The sign preceding the voltage between DA+ and DA–

determines signal values 0 and 1.

DALI bus cable Cable type 2-wire, stranded (one wire pair)

or 5-wire, stranded

or 7-wire, stranded

Wiring cross section Min. 1.5 mm

(AWG16).

Distance (sum of all bus sections) Max. 300 m / 1000 ft

Screens Not required

Note PXC3… devices do not have a connection for bus cable screens.

Bus power supply Bus power through the PXC3… room automation

station

DC 16 V, 128 mA.

(for max. 64 DALI devices)

DALI

bus

Communication signal