Dell PowerEdge R640 EMC PowerEdge R640 Installation and Service Manual - Page 155

Installing a power supply unit, Removing a DC power supply unit

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Next steps Install the PSU or the PSU blank. Installing a power supply unit The procedure for installing AC and DC PSUs is identical. Prerequisites 1. Follow the safety guidelines listed in Safety instructions on page 71. 2. For systems that support redundant PSU, 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. Figure 109. Installing a power supply unit Next steps 1. If you have unlatched the cable management arm, relatch it. For information about the cable management arm, see the system's rack documentation at https://www.dell.com/poweredgemanuals. 2. Connect the power cable to the PSU, and plug the cable into a power outlet. CAUTION: When connecting the power cable to the PSU, secure the cable to the PSU with the strap. 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 redundancy may not occur until discovery is complete. Wait until the new PSU is discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that the PSU is functioning properly. Removing a 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. Installing and removing system components 155

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Next steps
Install the PSU or the PSU blank.
Installing a power supply unit
The procedure for installing AC and DC PSUs is identical.
Prerequisites
1.
Follow the safety guidelines listed in
Safety instructions
on page 71.
2.
For systems that support redundant PSU, 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.
Figure 109. Installing a power supply unit
Next steps
1.
If you have unlatched the cable management arm, relatch it. For information about the cable management arm, see the system’s rack
documentation at
.
2.
Connect the power cable to the PSU, and plug the cable into a power outlet.
CAUTION:
When connecting the power cable to the PSU, secure the cable to the PSU with the strap.
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 redundancy may not occur until discovery is complete. Wait until the new
PSU is discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify
that the PSU is functioning properly.
Removing a 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.
Installing and removing system components
155