Installing the cma, Figure 2, Routing power cables through the strain reliefs – Dell PowerEdge Rack Enclosure 2410 User Manual

Page 5: Figure 3, Attaching the inner cma attachment bracket

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Cable Routing Procedures for the Dell PowerEdge R820 System

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1.2. Routing the power cables through the strain reliefs

After you have installed the tray and cables, route the power cables through the strain reliefs located
on the power supply handles as shown in Figure 2.

Routing power cables through the strain reliefs

Figure 2.

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; 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 (as
viewed from the rear of the system). See Figure 3.

Attaching the inner CMA attachment bracket

Figure 3.

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