Siemens SIMATIC NET PS598-1 Compact Operating Instructions page 17

Three PS598-1 units for two devices - 2-out-of-3 redundancy
Figure 5-3 Connecting three power supply units to a SCALANCE XR552-12M.
SCALANCE XR528-6M is used analogously.
Connect each SCALANCE XR500 to its own PS598-1. In addition to this, connect
both SCALANCE XR500 devices to the third PS598-1. Both SCALANCE XR500
devices can now continue to operate after the failure of one PS598-1. The
SCALANCE XR500 detects the failure of a power source and signals the failure. The
PS598-1 units share the applied load automatically and uniformly.
Note
Two connectors for the 24 VDC output voltage
The PS598-1 has two connectors with the output voltage 24 VDC. Note that you can
only use the connector on the front or the connector on the rear of the PS598-1. You
cannot operate the device with the connectors on the front and rear at the same time.
Note
To wire up the power supply connector, use copper cable of the category 14 AWG to
10 AWG or cable with a cross-sectional area of 1.5 to to 4 mm
Power supply unit PS598-1 for SCALANCE XR500
A5E03275848-04, 05/2013
Connection
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2
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