Rockwell Automation PDC24 / PAC Chassis Power Supplies - Manual

Triguard SC300E
PDC24 / PAC
Chassis Power Supplies
(PDC24 / PAC)
Issue 3 October 2005
INTRODUCTION
PURPOSE
Two Power Supply Units (PSUs) provide a dual-redundant source of 5.4Vand 12Vdc onto the
backplane for the modules mounted in a SC300E chassis. The PSUs are mounted one above
the other in the left hand side of the chassis as shown.
Each PSU has a fault warning system and a power sharing system. The power sharing system
operates when both PSUs are working. Either PSU has the capacity to power the system if the
other one fails.
The PSUs operate from the following supplies detailed in Table 1-1:
This document is intended to provide a general understanding of the function of the PAC and
PDC24, sufficient to enable basic maintenance operations to be effected in the field.
Figure 1-1. PDC24 / PAC General view
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