Siemens S7-400 installation manual Changing the Ventilation

Installing the S7-400

2.8Changing 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 modify 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 base cover is secured with clips. Firmly press down the cover in the clip areas to remove it.

4.Snap the cover into the snap-in hinges at the rear edge of the base, rougly at a right angles to 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.

2-20	Automation System S7-400	Hardware and Installation
		A5E00850741-01