Connections 01.04
6-18 SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
6.3 Parallel connection of converters
6.3.1 Circuit diagram showing parallel connection of SIMOTRAS converters
3AC 50-60Hz
110-500V
3AC 50-60Hz, 400V
L1 L2 L3
4U1 4V1 4W1
1)
3)
X166X165
5W15U1
V2
T2
W2
T3
2)
1)
3)
1)
3)
5N1
NC
5W15U15N1
NC
5W15U15N1
NC
CUD2
X166X165
CUD2 CUD2
X166X165
34 37 38
CUD1
34 37 38
CUD1
34 37 38
CUD1
4U1 4V1 4W1 4U1 4V1 4W1L1 L2 L3
L1 L2 L3
M
3~
U2
T1
V2
T2
W2
T3
2)
U2
T1
V2
T2
W2
T3
2)
U2
T1
SIMOTRAS-converter (Slave)
Fan Power
supply
Fan Power
supply
Fan Power
supply
SIMOTRAS-converter (Slave)SIMOTRAS-converter (Master)
1) The same phase sequence is required between U1(L1) / V1(L2) / W1(L3).
2) The same phase sequence is required between U2(T1) / V2(T2) / W2(T3).
3) The converters are connected by means of an (8-pin) shielded Patch cable of type UTP CAT5
according to ANSI/EIA/TIA 568, such as those used in PC networking.
A standard 5 m cable can be ordered directly from Siemens (order number: 6RY1707-0AA08).
(n-1) cables are needed to connect n converters in parallel.
The bus terminator must be activated (U805=1) on the converter at each end of the bus.
The terminal expansion option (CUD2) is required for each converter in a parallel connection.
A maximum of 6 converters can be connected in parallel.
When several converters are connected in parallel, the master unit should be positioned in the
center to allow for signal transit times. Maximum length of paralleling interface cable between
master and slave converters at each end of bus: 15m.
For the purpose of current distribution, separate commutating reactors of the same type are
required for each SIMOTRAS converter. Current distribution is determined by the differential reactor
tolerance. A tolerance of 5% or better is recommended for operation without derating (reduced
current).
Caution:
Parallel connections may only be made between converters with the same current rating!
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