Siemens S7-400 installation manual Installing the Fan Subassembly, Procedure

Installing the S7-400

2.9Installing the Fan Subassembly

Procedure

1.Remove the left cover from the fan subassembly.

Using a 17 mm open-ended wrench, slacken the quick-release lock a quarter turn.

Pull out the left cover of the fan subassembly. To do this, move the left cover parallel to the fan subassembly in order to avoid damaging the plug-in contact on the other side.

The following figure shows you how to remove the left cover.

Snap-in mechanism

of dummy covers

Plug-in contact

Back of cable

routing

Direction for

pulling off

Left cover

Quick-release lock

Note

Provide the fan subassembly with dummy plates beneath free slots, this will ensure optimum ventilation.

The fan subassembly is supplied with 18 dummy plates, arranged as 2 units, each with 9 individual dummy plates. By breaking at one of the rupture joints, you can split up the individual plates as required.

2.Remove the dummy plates which are not required by slackening the snap-in mechanisms of the covers and pulling them off.

3.Break off as many dummy plates as required.

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