Mechanical Configuration - Siemens SIMATIC S7-400 Hardware And Installation Manual

Assembling the M7-400
8.1

Mechanical Configuration

Introduction
Explained in this section are the rules you must observe for arranging modules in
the M7-400 automation computer.
All other information which is important for the mechanical configuration applies
both to the S7-400 and the M7-400, and is described in Chapter 2.
Rules for the Arrangement of Modules
You must observe the following rules for the arrangement of modules in a rack:
The power supply module must be inserted in slot 1 in all racks.
The receive IM in the expansion rack must always be inserted on the extreme
right.
A module assembly comprising CPU and expansion units must be configured in
a particular sequence. Shown in Table 8-1 are the possible configurations of a
module assembly with a specified sequence for the expansion units.
Table 8-1 Sequence in the Module Subassembly
Slot n and n + 1 for double-width
CPU 486-3, CPU 488-3
8-2
www.gkbpx.com
CPU
CPUs
EXM 478
EXM 478
EXM 478
EXM 478
EXM 478
EXM 478
ATM 478
ATM 478
ATM 478
MSM 478
EXM 478
EXM 478
EXM 478
MSM 478
MSM 478
S7-400 and M7-400 Programmable Controllers, Installation Manual
Slot Slot
n + 2 n + 3
-
EXM 478
EXM 478
EXM 478
ATM 478
ATM 478
-
ATM 478
ATM 478
-
MSM 478
EXM 478
MSM 478
ATM 478
ATM 478
C79000-G7076-C424-01
Slot
n + 4
-
-
EXM 478
ATM 478
ATM 478
-
-
-
ATM 478
-
-
MSM 478
ATM 478
ATM 478
-