Siemens S7-400 installation manual Wiring the Power Supply Connector

Wiring the S7-400

Wiring the Power Supply Connector

To wire the power supply connector, follow the steps outlined below:

!Warning

There is a risk of personal injury.

If you wire the connector with voltage applied, you may suffer a shock and personal injury.

Only wire the connector with power disconnected.

1. Switch off the line voltage at your VAC supply disconnector.

Note

The standby switch of the power supply module does not disconnect the power supply module from the supply.

2.Are you using a flexible sheathed cable with outer insulation (with 230 VAC)?

If so: Strip the outer insulation over a length of 70 mm. Note that an overall cable diameter of between 3 mm and 9 mm must be present under the strain relief after connection.

If not: Wrap the cores with insulating tape so that an overall cable diameter of between 3 mm and 9 mm will be present under the strain relief after connection. As an alternative to insulating tape, you can use a shrink-on sleeve.

3.Shorten the two cores which are not needed for connection to protective ground (PE) by 10 mm.

4.Strip the cores over a length of 7 mm.

5.Slacken the screw in the cover of the power supply connector and open the connector.

Automation System S7-400	Hardware and Installation	4-19
A5E00850741-01