7 methods of ventilation – Siemens Automation System S7-400 User Manual
Page 34
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
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