Changing The Ventilation With The Cable Duct And Fan Subassembly - Siemens S7-400 Installation Manual

2.8 Changing the Ventilation with the Cable Duct and Fan
Subassembly
Changing the Ventilation
At the base of the cable duct and the fan subassembly, there is a cover that you
can move in order to change the air duct. To do this, proceed as follows:
1. Using a screwdriver, make a quarter turn counter-clockwise to open the two
quick-release locks at the front of the cable duct or fan subassembly.
2. Grasp the base with both hands; press it gently downward and pull it fully out of
the cable duct or fan subassembly.
3. The cover is secured to the base with snap catches. Press the cover from
below, close to the snap catches, and remove the cover.
4. At approximately right angles to the base, insert the cover in the snap hinges at
the rear edge of the base.
5. Slide the base in again and push it up.
6. Use a screwdriver to make a quarter turn clockwise and close the two
quick-release locks.
The following figure shows both methods of selecting the ventilation by
appropriately fitting the cover in the base of the cable duct or fan subassembly.
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Installing the S7-400
2-21