Siemens S5-155U System Manual page 284

The 300 and 312 Interface Modules
Figure 7-5 Centralized Communication Between Central Controller and Expansion Units with a Power Supply Unit
EU 184U
EU 187U
EU 184U
EU 187U
EU 184U
EU 187U
S5-135U/155U
CC
Figure 7-6 Centralized Communication Between Central Controller and Expansion Units without a Power Supply Unit
7 - 10
Shown in the following figures is the centralized communication
between central controller and expansion units, with and without
supply of power via the IM 300 and IM 312.
Terminator
IM 312-3
EU 183U
IM 312-3
EU 183U
IM 312-3
EU 183U
IM 312-3
EU 183U
IM 300-3
S5-135U/155U
CC
IM 312-5
IM 312-5
IM 312-5
IM 300-5
5 A max.
(1,5m)
The EU with the highest current consumption should be positioned as
closely as possible to the CC.
With this arrangement, the two
cabinets must be electrically
interconnected.
IM 312-5
EU 184U
EU 187U
(0.5m)
IM 312-5
EU 184U
EU 187U
System Manual
C79000-B8576-C199-03