Siemens SCALANCE XR324-4M EEC Operating Instructions Manual page 42

Connecting
5.4 Power supply
Connecting a redundant power supply to 1 power supply unit
Use "PS1" to connect the power supply of the terminal block.
Figure 5-2
Figure 5-3
● 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".
Figure 5-4
42
Assignment of the LED display to the pins for redundant power supply with devices with
one power supply unit
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.
SCALANCE XR-300M EEC
Operating Instructions, 11/2015, A5E02661176-09