Dell PowerEdge R740xd2 EMC Installation and Service Manual - Page 138

Installing DC power supply unit, Power interposer board

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Installing DC power supply unit Prerequisites NOTE: For equipment using -(48-60) V DC power supply units (PSUs), a qualified electrician must perform all connections to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself. All electrical wiring must comply with applicable local or national codes and practices. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow all safety instructions that came with the product. 1. Follow the safety guidelines listed in Safety instructions. 2. For systems that support redundant power supply units (PSUs), ensure that both the PSUs are of the same type and have the same maximum output power. NOTE: The maximum output power (shown in watts) is listed on the PSU label. Steps Slide the PSU into the system until the PSU is fully seated and the release latch snaps into place. Next steps 1. Connect the safety ground wire. 2. Install the DC power connector in the PSU. CAUTION: When connecting the power wires, ensure that you secure the wires with the strap to the PSU handle. 3. Connect the wires to a DC power source. NOTE: When installing, hot-swapping, or hot-adding a new PSU, wait for 15 seconds for the system to recognize the PSU and determine its status. The PSU status indicator turns green to signify that the PSU is functioning properly. Power interposer board Removing power interposer board Prerequisites 1. Follow the safety guidelines listed in Safety instructions. 2. Power off the system and all attached peripherals. 3. Disconnect the system from the electrical outlet, and disconnect the peripherals. 4. Open the drive bays, remove all drives, and then close the drive bays. 5. Remove the power supply units. 6. Remove the system from the rack and place it on an ESD work bench. For more information, see the Rail Installation Guide available at www.dell.com/poweredgemanuals. 7. Remove the system cover. 8. Remove the air shroud. 9. Disconnect all the cables from the power interposer board (PIB). CAUTION: To prevent damage to the power interposer board, you must remove the power supply module (s) from the system before removing the power interposer board. NOTE: Ensure that you note the routing of the cables as you remove them from the system board. Steps 1. Press the blue release tab on the PIB to release it from the hook on the PSU cage. 2. Lift the board and slide it out at an angle to disengage the guide pins on the board. 138 Installing and removing system components

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Installing DC power supply unit
Prerequisites
NOTE:
For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all
connections to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself.
All electrical wiring must comply with applicable local or national codes and practices. Damage due to servicing that is
not authorized by Dell is not covered by your warranty. Read and follow all safety instructions that came with the
product.
1.
Follow the safety guidelines listed in
Safety instructions
.
2.
For systems that support redundant power supply units (PSUs), ensure that both the PSUs are of the same type and have the same
maximum output power.
NOTE:
The maximum output power (shown in watts) is listed on the PSU label.
Steps
Slide the PSU into the system until the PSU is fully seated and the release latch snaps into place.
Next steps
1.
Connect the safety ground wire.
2.
Install the DC power connector in the PSU.
CAUTION:
When connecting the power wires, ensure that you secure the wires with the strap to the PSU handle.
3.
Connect the wires to a DC power source.
NOTE:
When installing, hot-swapping, or hot-adding a new PSU, wait for 15 seconds for the system to recognize the
PSU and determine its status. The PSU status indicator turns green to signify that the PSU is functioning properly.
Power interposer board
Removing power interposer board
Prerequisites
1.
Follow the safety guidelines listed in
Safety instructions
.
2.
Power off the system and all attached peripherals.
3.
Disconnect the system from the electrical outlet, and disconnect the peripherals.
4.
Open the drive bays
, remove
all drives
, and then
close the drive bays.
5.
Remove the
power supply units
.
6.
Remove the system from the rack and place it on an ESD work bench. For more information, see the
Rail Installation Guide
available at
www.dell.com/poweredgemanuals
.
7.
Remove the system cover
.
8.
Remove the air shroud.
9.
Disconnect all the cables from the power interposer board (PIB).
CAUTION:
To prevent damage to the power interposer board, you must remove the power supply module (s) from the
system before removing the power interposer board.
NOTE:
Ensure that you note the routing of the cables as you remove them from the system board.
Steps
1.
Press the blue release tab on the PIB to release it from the hook on the PSU cage.
2.
Lift the board and slide it out at an angle to disengage the guide pins on the board.
138
Installing and removing system components