Siemens S7-400PLC Dokumentacja Strona 393

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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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