Installation Instructions

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Siemens Desigo Desigo Room automation - Engineering, mounting and installation CM111043en_14
Smart Infrastructure DALI network 2020-10-30
The overall length is 300 m / 1000 ft for a wiring cross-section of at least 1.5 mm
2
.
The permissible voltage drop off over the DALI line and the terminals is a maximum
of 2 V. The voltage drop off over the DALI line is typically 90% of 2V (1.8V) and via
the terminals 10% of 2V (0.2V).
Must comply with low-voltage installation regulations since the DALI signal is not
SELV.
NO protection against miswiring with AC 24 V or AC 230 V:
Applying a voltage between DA+ / DA+ or between DA– / DA– will destroy the
device!
This is particularly the case when the AC 24 V supply plug is connected to
the DALI socket.
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
DALI bus cable Cable type 2-wire (one wire pair)
or 5-wire
or 7-wire
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 by
room automation station
PXC3
Nominal voltage DC 16 V
Guaranteed supply current
128 mA (PXC3.E…A-100A)
230 mA (PXC3.E…A-200A)
Maximum supply current
250 mA
Shutdown mechanism
Shutdown delay time
Restart period
PXC3.E…A-200A only:
700 ms
10 s
Protection Short-circuit proof
Upon power-on, AC 230 V bus
voltage is recognized on terminals
DA+ and DA–.
Operation with an external power supply is NOT possible!
NO protection against miswiring with AC 24 V or AC 230 V:
Voltage between DA+ / DA+ or between DA
-
/ DA
-
will destroy the device!
Admissible cable
lengths
Note
.
Regulations
Faulty wiring
DALI
bus