Siemens S5-135U/155U - Manual (Page 303)

7-13
System Manual
C79000-G8576-C199-06
7.3 The 304 and 314 Interface Modules
The IM 304 and IM 314 are used to connect I/O modules, signal
preprocessing modules (IPs) and communication processors (CPs) to a CC in
a distributed arrangement via the
S
EU 185U
S
ER 701-3
expansion units.
You can also use the IM 304 and IM 314 to connect I/O modules to a CC in a
distributed arrangement via the
S
EU 183U
S
ER 701-2
expansion units.
You can connect up to two-times four EUs in a distributed arrangement via
one IM 304. If you utilize the 721 connecting cable, the total line length from
the CC to the last EU may be 600 m per run. You can connect additional EUs
in a centralized arrangement to the distributed EUs.
You can insert up to four IM 304s in one CC.
The IM 304 EU interface module is complemented by the IM 314 CC
interface module. In fault-tolerant systems, you must use the IM 314R CC
interface module together with the IM 304 (refer to the S5-155H manual).
EU Type EU Interface Module CC Interface Module
EU 183U
EU 185U
ER 701-2
ER 701-3 IM 304 IM 314
You may only set module addresses in the EU which you do not use in
the CC. This also applies when the EU is addressed in the extended (O) area,
IM3 area or IM4 area.
Line Length
Interface Modules