Distribution Of Modules To Several Racks; Table 4-4 Interface Modules - Overview - Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual

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Configuring

4.6 Distribution of modules to several racks

4.6
Distribution of modules to several racks
Exceptions
With CPU 312 and CPU 312C, only a single-row configuration on a rack is possible.
Using interface modules
If you are planning an assembly in multiple racks, then you will need interface modules (IM).
Interface modules route the backplane bus of an S7-300 to the next rack.
The CPU is always located on rack 0.
Table 4-4
Interface modules - Overview
Properties
Send IM in rack 0
Receiver IM in racks 1 to 3
Maximum number of expansion
modules
Length of connecting cables
Remarks
4-8
Two or more rows
IM 360
order no..: 6ES7 360-3AA01-0AA0
IM 361
order no..: 6ES7 361-3CA01-0AA0
3
1 m (6ES7 368-3BB01-0AA0)
2.5 m (6ES7 368-3BC51-0AA0)
5 m (6ES7 368-3BF01-0AA0)
10 m (6ES7 368-3CB01-0AA0)
-
Cost-effective 2-row configuration
IM 365
order no..: 6ES7 365-0AB00-0AA0
IM 365 (hard-wired to send IM 365)
1
1 m (hard-wired)
Rack 1 can only receive signal modules;
the accumulated current load is limited to
1.2 A, whereby the maximum for rack 1 is
0.8 A
These restrictions do not apply to operation
with interface modules IM 360/IM 361
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05

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