Siemens S5-135U/155U - Manual (Page 22)

2-4
System Manual
C79000-G8576-C199-06
With the distributed configuration, a distinction is made between parallel and
serial communication. The main features of these types of communication
are as follows:
S
Parallel fast data transmission line length of up to 600 m
S
Serial slower data transmission line length of up to 3000 m
2.2.1 Installing a PLC with Centralized Configuration
The following table shows which interface modules and connecting cables
can be used for connecting the various expansion units to the CC in a
centralized configuration.
Interface Module
in the CC
Expansion Unit Interface Module
in the EU
Connecting Cable
Max. Distance
IM 300-3
6ES5 300-3AB11
IM 301-3 1)
6ES5 301-3AB13
EU 183U
EU 185U
(I/O mod. only)
EU 183U
EU 185U
(I/O mod. only)
IM 312-3 2)
6ES5 312-3AB11
IM 312-3 2)
6ES5 312-3AB31
fixed to the IM 312 module
0.5 m; 0.95 m
fixed to the IM 312 module
0.5 m; 0.95 m
IM 300-5
6ES5 300-5CA11
IM 301-5 1)
6ES5 301-5CA12
EU 184U
EU 187U
EU 184U
EU 187U
IM 312-5
6ES5 312-5CA11
IM 312-5
6ES5 312-5CA21
fixed to the IM 312 module
0.5 m; 1.5 m
fixed to the IM 312 module
0.5 m; 1.5 m
IM 300-5
6ES5 300-5LB11 ER 701-1 IM 306
6ES5 306-7LA11 6ES5 705-0xxxx
0.5 m to 2,5 m
1) This IM has a second interface for distributed communication.
2) The last IM 312-3 always requires a 6ES5 760-0AB11 terminator.
To install a PLC in a centralized configuration, you must observe the
following conditions:
S
A centralized configuration is generally only suitable for connecting I/O
modules (DI, DO, AI, AO) and some intelligent I/O modules (IPs) in the
EU (see the Configuring Aids in the catalog and Chapter 4).
S
The line length between the IM in the CC and the last IM in the EU must
not exceed 2 m.
Centralized and Distributed Configuration of a Programmable Controller