Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018 9
Chapter 1
8720MC-RPS Regenerative Power Supply
Overview
Use this chapter to become familiar with the design and installation
requirements of the 8720MC-RPS regenerative power supply.
8720MC-RPS Series Change
The initial 8720MC-RPS units have no series designation on the nameplate. In
this publication, those units are referred as series #. The following changes
apply to series B units.
• Catalog numbers 8720MC-RPS065Bx and 8720MC-RPS090Bx
(series B) units are RoHS compliant. Because of internal timing and
switching functions, series B units cannot replace series # units in
configurations with two or three parallel units.
• Catalog numbers 8720MC-RPS190Bx (series B) units have main AC
input and DC-bus terminations that run perpendicular (turned 90°) to
the front cover, compared with series # units, that run parallel to the
front cover.
• Mounting dimensions for the 8720MC-RPS190 (series B) unit changed
slightly, but are still within the tolerance needed for series B units to
reuse the same mounting holes intended for series # units.
• The internal capacitance of 8720MC-RPS065 units increased from
1900 μF (series #) to 1960 μF for series B units.
• A second precharge resistor was added to 8720MC-RPS190 (series B)
units to improve precharge capacity.
Topic Page
8720MC-RPS Series Change 9
About the 8720MC-RPS Power Supply 10
Input Power Configurations 11
Catalog Number Explanation 14
IMPORTANT In parallel configurations of two or three units, all parallel units
must be series # or series B units. They cannot be mixed.
IMPORTANT Due to a change in the bus-bar orientation, the 8720MC-RPS190Bx
(series B) AC input wiring and DC-bus wiring is routed differently,
compared to series # units.
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