S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
393
Cable duct and fan subassemblies
9
9.1 Features
Overview
The cable duct and the fan subassembly have the following characteristics
● The air inflow area is variable.
● Shield and cable clamping are possible.
In addition, the fan subassembly has the following characteristics:
● Fans and filter frames can be replaced from the front during operation.
● The fan function is controlled by means of speed monitoring.
● Operation with filter frames is optional.
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