Siemens SIMATIC S7-400 Hardware And Installation Manual page 30

Installing the S7-400
Space Required When Using Cable Channels and Fan Subassemblies
A cable duct or fan subassembly must be installed in the 19-inch pitch immediately
below the rack. Additional space for cable routing must be provided on both sides.
The following figure shows how much space you need to allow for when using a
cable duct or fan subassembly.
440 mm
Mounting depth, fitted: 237 mm max.
Dimensions of the Racks
The following figure shows the dimensions for racks with 18 and 9 slots and the
positions of cutouts for screw mounting.
The cutouts are arranged according to the 19-inch standard.
60 mm
290 mm 190 mm
40 mm
Depth = 27.5 mm without modules
Depth = 237.0 mm with modules
2-10
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Cable duct/fan subassambly
522.5 mm (with cable duct)
542.5 (with fan subassembly)
465 mm
482.5 mm
S7-400 and M7-400 Programmable Controllers, Installation Manual
19-inch reference level
240 mm
257.5 mm
C79000-G7076-C424-01