Components and Architecture - Hardware Components
Revision 19 HC900 Process Controller Installation and User Guide 21
06/14
Power Supply
The P01 Power Supply, shown in
Figure 10, provides 5 Vdc and 24 Vdc to the backplane connectors in the local and remote racks. Power
Supply is used in each Controller Rack, I/O expansion racks and for all rack versions (4-slot, 8-slot, and 12-
Slot).
The lower capacity P02 power supply is available for reduced I/O applications and for Redundant processor
rack power.
P24 power supply provides 5VDC and 24VDC to satisfy the power requirements of a single controller with
I/O, a Remote I/O rack or a Redundant C75 CPU. The 60 watt capacity requires minimal de-rating of the
available HC900 I/O modules. A tool-secured door covers the voltage connections. An internal non-
replaceable fuse limits supply current under certain fault conditions.
Each power supply includes an internal 5.0-amp
fuse that is not field-replaceable. (An external
fuse may be added by the user. See page 19)
Items shown with key numbers:
1. Voltage test points (P01model only)
2. AC Input terminal block
3. Wiring label
4. Grounding lug (Reference; lug is not part of
Power Supply; it is staked to bottom of Rack.)
Figure 10 – Power Supply
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