Installation of the cma – Dell PowerEdge Rack Enclosure 2420 User Manual

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Cable Routing Procedures for Dell™ PowerEdge™ T710 Systems

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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.

Figure 2: Routing Power Cables Through the Strain Reliefs


Installation of the CMA

NOTE: For guidelines on how to route cables within the rack, refer to the Dell

Best Practices Guide for

Rack Enclosures

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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. Install the CMA on either the rear right or rear left side of the rails by attaching both CMA housings

to the attachment brackets on the rails.

2. Route the cables through the CMA while avoiding twisting the cables. Use the hook and loop

straps on the CMA to secure the cables. See Figure 3.

3. If the cable bundle includes a keyboard, video, and mouse (KVM) dongle, place the dongle inside

the CMA basket.

4. Once you have routed all the cables through the CMA, dress the cable slack between the back of

the system and the entrance of the CMA using the tie wraps (shown in yellow in all illustrations)
provided in the CMA kit.

5. Clip off the excess length of material from the tie wraps. Make sure that the heads of the tie wraps

are positioned so as to avoid interference with adjacent systems. Return the CMA to the closed
(retracted) position.

6. Extend the system out of the rack to verify that there is sufficient slack in the cables on both ends

of the CMA.

See Figure 4 for an example of a completed right-side mounted CMA installation.
See Figure 5 for an example of a completed left-side mounted CMA installation.