Dell PowerEdge R840 EMC Installation and Service Manual - Page 132

Installing a power supply unit blank, Removing power supply unit

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Figure 104. Removing a power supply unit blank Next steps Install the PSU or PSU blank. Installing a power supply unit blank Prerequisites 1. Follow the safety guidelines listed in Safety instructions on page 44. 2. Install the power supply unit (PSU) blank only in the second PSU bay. Steps Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place. Figure 105. Installing a power supply unit blank Removing power supply unit The procedure for removing AC and DC PSUs is identical. Prerequisites CAUTION: The system needs one power supply unit (PSU) for normal operation. On power-redundant systems, remove and replace only one PSU at a time in a system that is powered on. 1. Follow the safety guidelines listed in Safety instructions on page 44. 1. Disconnect the power cable from the power source and from the PSU you intend to remove, and then remove the cable from the strap on the PSU handle. 2. To remove the PSU, remove optional strain relief bar and strain relief bar attachment bracket, if they interfere with the PSU removal. For information about the strain relief bar attachment bracket and strain relief bar, see the system's Rail Installation Guide at www.dell.com/poweredgemanuals. 132 Installing and removing system components

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Figure 104. Removing a power supply unit blank
Next steps
Install the PSU
or
PSU blank
.
Installing a power supply unit blank
Prerequisites
1.
Follow the safety guidelines listed in
Safety instructions
on page 44.
2.
Install the power supply unit (PSU) blank only in the second PSU bay.
Steps
Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place.
Figure 105. Installing a power supply unit blank
Removing power supply unit
The procedure for removing AC and DC PSUs is identical.
Prerequisites
CAUTION:
The system needs one power supply unit (PSU) for normal operation. On power-redundant systems, remove
and replace only one PSU at a time in a system that is powered on.
1.
Follow the safety guidelines listed in
Safety instructions
on page 44.
1.
Disconnect the power cable from the power source and from the PSU you intend to remove, and then remove the cable from the
strap on the PSU handle.
2.
To remove the PSU, remove optional strain relief bar and strain relief bar attachment bracket, if they interfere with the PSU removal.
For information about the strain relief bar attachment bracket and strain relief bar, see the system’s Rail Installation Guide at
www.dell.com/poweredgemanuals
.
132
Installing and removing system components