Network Router User Manual

Installing the S7-400

2-10

Automation System S7-400 Hardware and Installation

A5E00850741-01

2.5 Mounting and Grounding the Racks

Important Notes on Installation

The S7-400 racks are designed for wall mounting, mounting on r ails, and for

installation in frames and cabinets. Their mounting dimensions are compliant 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).

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

40 mm

22 mm

352 mm

Mounting depth, fitted: max. 237 mm

40 mm facilitates the mounting of a fan subassembly

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523 mm (18 slots)

298 mm (9 slots)

173 mm (4 slots)