Connecting
6.4 Power supply
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
133
6.4.2.3 Connecting the power supply 100...240 V AC with X-300EEC / XR-300M EEC
Power supply 100 to 240 V AC / 60 to 250 V DC
The switch is available in the following versions for power supply with the multirange power
supply unit 100 to 240 V AC / 60 to 250 V DC:
● With a single power supply unit (XR324-4M EEC, 1 x 230 V AC)
● With redundant power supply units (XR324-4M EEC, 2 x 230 V AC)
Each power supply unit PS1 and PS2 has a separate supply connector.
You can recognize the type of power supply from the labeling on the device and the labeling
of the terminal block for the power supply of the switch.
On devices with a 100 to 240 V AC power supply, the connectors of the signaling contact
and the power supply are identical. To avoid confusion, the two pins have a different coding.
Grounding
WARNING
PE connection with X-300EEC and XR-300EEC
Grounding simply via the housing is inadequate. For safe operation, the protective ground
must be connected to the grounding bolts.
On the SCALANCE X-300EEC, the PE connector is on the bottom of the device. On the
SCALANCE XR-300M EEC, the PE connector is on the rear of the device between the
power connectors.
Connection to the power supply and pin assignment of the terminal block
The connection is made via one (or two) 3-pin connector(s) on the terminal block for the
power supply.
Table 6- 6 Pin assignment at terminal block 100 to 240 V AC / 60 to 250 V DC for the power supply
Pin number Assignment
Pin 1 L (100 to 240 V)
Pin 2 N
Pin 3 FE
DC voltage is connected at the following terminals:
● Plus to "L"
● M to "N"
Secure the firm seat of connectors and the terminal block by tightening the screws (does not
apply to X-300EEC).
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