Revision 6 HC900 Process & Safety Controller User and Installation Manual 27
21 April 2017
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 Controller 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 25)
Items shown with key numbers:
1. Voltage test points (P01model only)
2. AC/DC 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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