Siemens S7-400 installation manual AC DC L1 L+

Wiring the S7-400

6.Slacken the screw of the strain relief and insert the cable.

7.Connect the cores according to the illustration on the cover of the power supply connector. Connect the longer core to PE. Screw on the cores with a torque of 0.6 to 0.8 N/m.

AC DC L1 L+

Terminals

	N	L--
	PE	PE
Cable	Strain-relief assembly	Screw for the strain-
		relief assembly

Figure 4-10 Wiring the power supply connector

8.Tighten the screw of the strain relief, so that the cable is secured properly.

9.Close the power supply connector and screw on the cover.

!Caution

The power supply module or power supply connector can be damaged.

If you plug in or disconnect the connector with voltage applied, the power supply module or the connector may be damaged.

Only plug in or disconnect the power supply connector with power removed.

4-20	Automation System S7-400	Hardware and Installation
		A5E00850741-01