Installing the S7-400

2.5Mounting 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 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.

352 mm

 

 

 

 

 

40 mm

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

20 mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20 mm

*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22 mm

 

 

 

 

 

 

 

 

 

 

523 mm (18 slots)

298 mm (9 slots)

173 mm (4 slots)

*40 mm facilitates the mounting of a fan subassembly Mounting depth, fitted: max. 237 mm

2-10

Automation System S7-400

Hardware and Installation

 

A5E00850741-01

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Siemens S7-400 Mounting and Grounding the Racks, Important Notes on Installation, Retaining Distances Between Devices