Installation manual

Installing the S7-400
2-10
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
2.5 Mounting and Grounding the Racks
Important Notes on Installation
The S7-400 racks are designed for wall mounting, mounting on rails, and for
installation in frames and cabinets. Their mounting dimensions comply with
DIN 41 494.
According to the UL/CSA and the EU Directive 73/23/EEC (low-voltage directive),
installation in a cabinet, a casing, or a closed operations room is necessary in order
to fulfil the requirements for electrical safety (see Reference Manual, Chapter 1).
In principle, the M7-400 is mounted like an S7-400 except that preassembly is
required (see Section 8.4 “Installing the M7-400”).
Step 1: Retaining Distances Between Devices
You must observe the minimum distances between the rack and neighboring
devices. You need these minimum clearances during installation and operation.
• For fitting and removing modules
• For fitting and disconnecting the module front connectors
• To ensure the air flow required for cooling the modules during operation
The following figure shows the minimum space you must provide for a rack.
20 mm
20 mm
40 mm
22 mm
522.5 mm (18 slots)
352 mm
Mounting depth, fitted: max. 237 mm
40 mm facilitates the mounting of a fan subassembly
*
*
297.5 mm ( 9 slots)
1 2 3 4 5 6 7 8 9 101112131415161718
172.5 mm (4 slots)