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7 methods of ventilation – Siemens Automation System S7-400 User Manual

Page 34

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Installing the S7-400

2-18

Automation System S7-400 Hardware and Installation

A5E00850741-01

2.7

Methods of Ventilation

Methods of Ventilation

Under extreme ambient conditions, particularly when operating S7-400 modules in
cabinets, you can use the cable duct or fan subassembly to optimize ventilation.

There are two methods of supplying air to the modules. You draw in air either from
the back or from below. The cable duct and fan subassembly can be converted for
this purpose.

The following figure shows the ventilation when air is drawn in from the back.

Exhaust air

Cable duct or fan

subassembly

Exhaust air

Modules

Wall

Modules

Supply air