3 routing the cables through the cma, 4 left-side mounting instructions, Routing the cables through the cma – Dell PowerEdge Rack Enclosure 2420 User Manual

Page 5: Left-side mounting instructions

background image

Cable Routing Procedures for Dell™ PowerEdge™ R910 Systems

Page 3


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


Routing the Cables Through the CMA

You can install the CMA on either the rear right or rear left side of the rails. Mounting the CMA on the

side that is opposite of the power supplies (left-side mount) is recommended; otherwise, the CMA
must be disconnected, to some extent, in order to remove the power supplies. Refer to Section 3 for
details on power supply replacement.

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

Best Practices Guide for

Rack Enclosures

white paper



Left-Side Mounting Instructions

1. Install the CMA on the 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. For left-side mounting, 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 left-side mounted CMA installation.