Connecting a redundant power supply to 1 power supply unit
Use the terminal block "X1" to connect the power supply.
Figure 6-2 Assignment of the LED display to the pins for redundant power supply with devices with one
power supply unit
X1
F2F1M2 L2M1L1F2F1M2 L2M1L1
L2L1
X2
Figure 6-3 Assignment of the LED display to the pins for redundant power supply with devices with two
power supply units
● If the power supply fails at pins L1/M1, this is indicated by LED L1.
● If the power supply fails at pins L2/M2, this is indicated by LED L2.
Connecting a redundant power supply to 2 power supply units
To connect the power supplies, use pins L1/M1 of the left terminal block "X1" and pins L1/M1
of the right terminal block "X2". Only "L1" is monitored on each terminal block.
Since both power supply units have connectors for redundant power supply, you can connect
2 power supplies to each of the two power supply units. This should, however, only be
necessary in extremely rare situations.
Connecting
6.6 Power supply
SCALANCE X-300
132 Operating Instructions, 11/2019, A5E01113043-24
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