Rev D CHP Max DC Power Supply 5-5
Power Conversion Circuitry
Power conversion circuitry produces the four isolated output voltages with the maximum
load current as specified in the following table.
Filters
Each voltage from the power conversion circuity passes through an independent filter that
reduces ripple noise near the switching frequency.
Isolation Circuitry
The output voltage from each filter is routed through a diode or steering FET that allows the
use of redundant Power Supply modules.
Microcontroller
The microcontroller monitors the voltages, fan current, and internal temperature and
communicates that information to the management module through the chassis’ backplane.
Installing/Removing the Power Supply Module
➤ To install a Power Supply module
1. Press upward on the latch release of the CMM or SMM module on the far right side
and then slide this module out the front of the chassis.
2. Position the Power Supply module with the multi-pin DC/Communication connector
toward the bottom.
3. Slide the rear (side with power and multi-pin connectors) of the Power Supply
module(s) into the chassis. Retaining tabs snap into place to secure the module.
4. Slide the CMM or SMM removed in Step 1 into the chassis.
Table 5.2 DC Power Supply Output Currents
+12.0 VDC +5.0 VDC +3.5 VDC –5.0 VDC
CHP-PS/DC1-Q 10 Amps 22 Amps 2.2 Amps 1.8 Amps
CHP-PS/DC1-SW 24 Amps 31 Amps 5 Amps 2 Amps
Note The 3.5VDC outputs do not have active current sharing circuitry.
Note Modules can be installed and removed with the chassis powered
(hot-swapped).
Note While a single power supply will operate in either the upper or lower bay, the
Craft terminal identifies the upper bay as slot 11 and the lower as slot 12.
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