Connecting
6.5 Power supply
SCALANCE X-300
138 Operating Instructions, 05/2016, A5E01113043-20
Image 6-5 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 "PS1" and pins
L2/M2 of the right terminal block "PS2".
Image 6-6 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.
It would also be possible to use the L1/M1 pins of the right terminal block. In this case,
however, identification of the terminal block involved from the LED display is not immediately
obvious.
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