Siemens SIMATIC S7-400 Hardware And Installation Manual page 185

Note
Establish whether there are additional regulations applying to all modules not
described in this manual.
Table 8-2 shows which modules can be used in the different racks.
Table 8-2 Possible Applications of the M7-400 Modules
Central Processing Units (CPUs)
Expansion Module (EXM)
AT Adapter Module (ATM)
Mass Storage Module (MSM)
Can only be inserted in conjunction with the CPU.
*
Dimensions of Modules in the M7-400
There are modules of 25 mm and 50 mm in width in the M7-400 system.
Table 8-3 contains a summary of dimensions of the modules used in the M7-400.
Table 8-3 Dimensions of Modules in the M7-400 System
CPU 486-3 (incl. mode switch)
CPU 488-3 (incl. mode switch)
Expansion Module
EXM 478
Mass Storage Module
MSM 478
AT Adapter Module
ATM 478
* The mounting depth is governed by the installed AT card and its connector.
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
UR1, UR2
Modules
Central
Module Slots Occupied
Assembling the M7-400
Racks
UR1, UR2 CR2
as as
Expansion
Rack Rack
-
*
-
*
-
*
-
Height
2 2
290 290
mm
1
ER1, ER2
-
*
-
*
-
*
-
Depth (Depth
when Fitted)
219 mm 219 mm
(236.5 mm)
210 mm 210 mm
(227.5 mm)
230 mm*
(247.5 mm*)
8-3