Rev D CHP Max AC Power Supply 4-5
Isolation Circuitry
The output voltage from each filter is routed through a diode or steering Field Effect
Transistor (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.
5. Connect the appropriate AC power cord based on installation site to the IEC 320 AC
power cord connector on the rear of the Power Supply module. Refer to Table 4.1
on page 4-2 for the appropriate power cord.
➤ To remove a Power Supply module
1. Disconnect the power cord from the rear of the Power Supply module.
2. Press upward on the latch release of the CMM or SMM module installed on the far
right side and then slide this module out the front of the chassis.
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 11and the lower as slot 12.
Note The CHP-PS/AC1-Q AC input power supply includes a power cord for 115VAC
United States installations.
Note A service interruption will occur during the following procedure unless two
Power Supply modules are installed.
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