Siemens S7-400 Setting the Fan Subassembly to the Line Voltage, Fuse, Wiring the Fan Subassembly

Wiring the S7-400

4.21Setting the Fan Subassembly to the Line Voltage and Wiring It

Setting the Fan Subassembly to the Line Voltage

Check whether the voltage selector switch in the fan subassembly is set to your line voltage (see Figure 4-24).

Fuse

The fan subassembly has two standard fuses:

•A 250 mA slow blow fuse for the 120 V range

•A 160 mA slow blow fuse for the 230 V range.

The fuse for the 230 V range is fitted before delivery.

Note

If you change the voltage range, you must also fit the fuse for this voltage range in the fan subassembly. Replacing the fuse is described in Chapter 7.

Wiring the Fan Subassembly

1.Strip the cables of the power cable. Press-fit wire end ferrules onto the conductors.

2.Insert the wires in the power terminals of the fan subassembly. Use a suitable screwdriver to release the spring contacts of the power terminals.

3.The small cover serves as a strain relief for the power cable. Choose one of the three sizes provided to suit your cable cross-section.

4.Screw the strain relief on.

Fit the small cover

as a strain relief

Power terminals

(spring contacts)

Voltage selector switch

Fuse cap

Figure 4-24 Wiring the Fan Subassembly

Automation System S7-400	Hardware and Installation	4-37
A5E00850741-01