Rockwell Automation Publication 7000-UM202D-EN-P - May 2018 145
Control Component Definition and Maintenance Chapter 3
DC/DC Power Supply
The DC/DC power supply provides a source of regulated DC voltages for
various logic control boards and circuits., using a regulated 56V DC source.
Figure 126 - DC/DC Converter Power Supply
The capacitor at the input terminals enables the equipment to ride through
power dips. If the capacitor (C hold-up) loses the 56V
(1)
input, it maintains the
voltage level for a period of time to enable a controlled shut-down. This
component is not required in all configurations.
Due to the critical nature of the ACB/DPM Logic power source, the DC/DC
power supply provides redundancy for the 5V rail. There are two separate 5V
outputs, each capable of powering the logic boards. In the event of one failing,
the drive switches to the other power supply automatically to provide the
output power.
24V-Isolators
24V-XIO
+/-24V-HECS
+/-15V Logic
5V-Logic
Sense Cable
DC/DC Power Supply
C hold-up
56V DC
+
–
(1) 56V DC for Pioneer and Cosel model numbers -XRWAC and earlier. 57V DC for Cosel model numbers -XRWAD and newer.
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