Dell PowerEdge R420 Manual - Página 5

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Dell PowerEdge R420 Manual
Cable Routing Procedures for Dell PowerEdge R320 & R420 Systems

1.2. Routing the power cables through the strain reliefs

After you have installed the tray and cables, route the power cable(s) through the strain relief(s)
located on the power supply handle(s) as shown in Figures 2 & 3.
Figure 2.
Routing power cables through the strain reliefs on hot swap power supplies
Figure 3.
Routing the power cable through the strain relief on a fixed power supply

1.3. Installing the CMA

The CMA can be installed on either the rear right or rear left side of the rails as described in the CMA
Installation Instructions. Mounting the CMA on the side that is opposite of the power supplies (left-side
mount) is recommended for systems with hot swap power supplies; otherwise, the CMA must be
partially disconnected in order to remove the outer power supply. Refer to Section 2 for details on
power supply replacement.
NOTE: If you are installing fiber-optic cables in the CMA, a cable bend radius of at least 1 inch must be
maintained throughout the length of the cable. It is recommended that fiber-optic cables be routed on
the exterior of the cable bundle to increase the bend radius of the fiber-optic cables through the CMA.
Additionally, a large amount of slack at the entrance and exit of the CMA is recommended.
1.3.1. Installing the inner CMA attachment bracket
As described in the CMA Installation Instructions, locate and attach the appropriate inner CMA
attachment bracket based on which side you wish to mount the CMA. Use the bracket marked "A" for
mounting the CMA on the left side, and the bracket marked "B" for mounting on the right side. See
Figure 4.
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