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Siemens
Desigo TRA Engineering, mounting and installation
CM111043en_09
Building Technologies
DALI network
2016-02-22
13.4 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
2
(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
