Cables - Siemens Desigo TRA Mounting And Installation Manual

Bus lines
Bus cable selection
Distances
Note:
. Regulations
Faulty wiring
Siemens
Building Technologies

10.3 Cables

The bus lines (= wired pair) are connected via DALI (DA).
Observe polarity.
Use standard off-the-shelf installation materials to wiring mains power. You must
observe the values indicated in this data sheet under "Technical data DALI".
AC24V can be provided in the same (2 + 3 stands) or in a separate cable (5 wire).
DA
DA
N
Commonly used cable sizes (as per DIN VDE 0100/T520/Section 6):
2
– NYM 5 x 1.5 mm
2
– NYM 7 x 1.5 mm
2
– NYM 2 x 1.5 mm und 3 x 1.5 mm
2
– NYM 2 x 1.5 mm und 5 x 1.5 mm
2
A 1.5 mm cable corresponds to a AWG16 cable.
The overall length is 300 meters for a wiring cross-section of at least 1.5 mm
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
DALI PCB!
This is particularly the case when the AC 24 V supply plug is connected to
the DALI socket.
Mounting and installation
DALI network
L
PE DA
PE
DA
L
N
2
2
2
.
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CM111043en_03
2013-02-23