The 301 And 310 Interface Modules - Siemens S5-155U System Manual

7.2

The 301 and 310 Interface Modules

System Manual
C79000-B8576-C199-03
The IM 301 is used to connect I/O modules and signal preprocessing
modules (IPs) to a CC in a distributed arrangement (allowing for
possible configurations) via an
• • EU 183U
• • EU 185U (only input/output modules)
expansion unit.
You can connect up to four EUs to a CC in distributed arrangement
via the IM 301. If you use the 721 connecting cable, the total cable
length from the CC to the last EU may be up to 200 m. The distributed
connection is made via the lower front connector of the module. Use
the IM 310 interface module in the EU to be connected in a distributed
arrangement:
EU Interface EU Type
Module
IM 301 EU 183U,
EU 185U (only
I/O modules)
Apart from the distributed EUs, you can connect the following
expansion units in a centralized arrangement:
• • EU 183U
• • EU 184U
• • EU 187U
The centralized connection is made via the upper front connector of
the module. Use the following interface modules, according to the EU
to be connected in a centralized arrangement:
EU Interface EU Type
Module
IM 301-5 EU 184U, EU 187U
IM 301-3 EU 183U
Unused centralized connections of the IM 301-3 and unused
distributed connections of the IM 301-3 and IM 301-5 must be
terminated with terminators. The same applies to the last IM 310.
You may only set module addresses in the EU which you are not yet
using in the CC. This applies to the normal (P) and extended (O) areas.

The 301 and 310 Interface Modules

CC Interface
Module
IM 310
CC Interface
Module
IM 312-5
IM 312-3
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