Siemens SCALANCE X-300

Connecting
6.4 Power supply
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
127
Connecting a redundant power supply to 1 power supply unit
Use the left terminal block to connect the power supply. The terminal block is marked "X1":
L1 L2
L1 M1 L 2M2 F1 F2 L1 M1 L 2M2 F1 F2
Figure 6-2 Anschluss_1_Netzteil_X-300EEC
Assignment of the LED display to the pins for redundant power supply with devices with one
power supply unit
● 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 and pins L1/M1 of
the right terminal block. The left terminal block is marked "X1" and the right terminal block
"X2".
L1 L2
L1 M1 L 2M2
F1 F2
L1 M1 L 2M2
F1 F2
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 of terminal block "X1", this is indicated by LED L1.
● If the power supply fails at pins L1/M1 of terminal block "X2", this is indicated by LED L2.