Siemens SCALANCE X320-3LD FE Operating Instructions Manual page 138

Connecting
6.5 Power supply
Image 6-5
● 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
● 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.
138
Assignment of the LED display to the pins for redundant power supply with devices with
two power supply units
Assignment of the LED display to the pins for redundant power supply with devices with
two power supply units.
Operating Instructions, 05/2016, A5E01113043-20
SCALANCE X-300