Rockwell Automation Publication 1606-RM110A-EN-P - July 2020
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Redundancy Power Supply - 24V, 10 A, 240 W, Single-phase Input
Series Operation
Power supplies of the same type can be connected in series for higher output
voltages. It is possible to connect as many units in series as needed, providing
the sum of the output voltage does not exceed 150V DC. Voltages with a
potential above 60V DC must be installed with a protection against touching.
Avoid return voltage (for example, from a decelerating motor or battery) which
is applied to the output terminals.
Keep an installation clearance of 15 mm (left / right) between two power
supplies and avoid installing the power supplies on top of each other. Do not
use power supplies in series in mounting orientations other than the standard
mounting orientation (input terminals on bottom of the unit).
Pay attention that leakage current, EMI, inrush current, harmonics will
increase when using multiple power supplies.
Figure 35 - Series Operation
Unit A
Input
Output
Unit B
-
+
-
+
Load
+
-
Input
Output