Connecting
6.4 Power supply
SCALANCE X-300
Operating Instructions, 02/2012, A5E01113043-12
131
6.4.1.4 24 VDC - product group X-300EEC
Redundancy with the 24...48 V power supply of the IE Switch X-300EEC
The X-300EEC is available with a single or redundant power supply unit to supply 24...48 V
DC. Each power supply unit is monitored for power failure.
The IE Switches X-300EEC therefore provide the following options for redundancy of the
24...48 V DC power supply:
● Redundant power supply with 1 power supply unit
You can connect a redundant power supply to each 24...48 V DC power supply unit.
● Redundant power supply units 24...48 V DC
Connect 1 power supply to each power supply unit.
Since both power supply units have 2 connectors for redundant power supply, you can
connect 2 power supplies to each of the two power supply units. This should, however,
only be necessary in extremely rare situations.
NOTICE
Connection with redundant power supply units 24...48 V DC
If you connect an X-300EEC with redundant power supply units 24...48 V DC to two
power supplies, you will need to connect the power supply to terminal "L1" on both
power supply units.
Only "L1" is monitored on each connector.
6.4.1.5 Connecting a redundant power supply to the X-300EEC
Device variants with 1 or 2 power supply units
There are device variants with one power supply unit and with two power supply units.
Connect the power supply as described below to achieve a correlation between the pin
assignment and LED display.
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