Connecting A Redundant Power Supply To The Xr300-Eec - Siemens SCALANCE X-300 Series Operating Instructions Manual

L1 M1
Figure 6-4
● 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.
6.6.1.9

Connecting a redundant power supply to the XR300-EEC

Device variants with 1 or 2 power supply units
There are devices variants with one power supply unit or with two power supply units. With
device variants with two power supply units, the 2nd power supply unit is also known as the
redundant power supply unit.
The connection is made using a 4-terminal plug-in terminal block to which two power supply
units can be connected (connected redundantly).
If two power supply units are connected, this is known as a redundant power supply.
Connect two power supplies as described below to achieve a correlation between the pin
assignment and LED display.
Connecting a redundant power supply to 1 power supply unit
Use "PS1" to connect the power supply of the terminal block.
F1
Figure 6-5
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24
L1 L2
M2 L2 F1 F2
X1
Assignment of the LED display to the pins for redundant power supply with devices with two
power supply units
L1 L2 L1 L2
F2 L1 M1 L1 M1 M2 M2 L2 L2
PS1
Assignment of the LED display to the pins for redundant power supply with devices with one
power supply unit
L1 M1 M2 L2 F1
X2
Connecting
6.6 Power supply
F2
133