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Cable Routing Procedures for the Dell PowerEdge R520 System

Section 2: Replacing a hot swap power supply on a PowerEdge

R520 system with a CMA

1. Swing the CMA to its service position as described in the CMA Installation Instructions provided

with the CMA kit.

2. If the bottom power supply is being replaced, first remove the tray from underneath the CMA as

described in the CMA Installation Instructions. If the top power supply is being replaced, the tray

can remain in place.

3. Disengage the strain relief and disconnect the power cord from the power supply.

4. Replace the power supply.

5. Plug in the power cord, re-engage the strain relief, replace the CMA support tray (if necessary),

and return the CMA to the closed (retracted) position.

1. Swing the CMA to its service position as described in the CMA Installation Instructions provided

with the CMA kit.

2. If the bottom power supply is being replaced, first remove the tray from underneath the CMA as

described in the CMA Installation Instructions. If the top power supply is being replaced, the tray

can remain in place.

3. Disengage the strain relief and disconnect the power cord from the power supply.

4. Disconnect both CMA attachment housings from the brackets on the rails as shown in Figure 8.

5. Detach the inner CMA bracket from the rail by pushing on the end of the lock spring and lifting the

bracket up and to the left until it clears the standoffs on the rail.

6. While supporting the CMA with one hand, remove and replace the power supply with the other

hand as shown in Figure 9.

7. Reinstall the inner CMA bracket to the rail and reconnect the CMA to the brackets.

8. Plug in the power cord, re-engage the strain relief, replace the CMA support tray (if necessary),

and return the CMA to the closed (retracted) position.