Dell PowerEdge 2410 User manual

Cable Routing Procedures for

Dell™ PowerEdge™ R715 Systems

A Dell™ Technical White Paper

Dell™

│

Datacenter Infrastructure Engineering

By Chris Kitten and Jose L. Flores

July 2010

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page ii

THIS WHITE PAPER IS FOR INFORMATIONAL PURPOSES ONLY, AND MAY CONTAIN TYPOGRAPHICAL

ERRORS AND TECHNICAL INACCURACIES. THE CONTENT IS PROVIDED AS IS, WITHOUT EXPRESS

OR IMPLIED WARRANTIES OF ANY KIND.

the express written permission of Dell Inc. is strictly forbidden. For more information, contact Dell.

Dell

, the

DELL

logo, the

DELL

badge, and

PowerEdge

are trademarks of Dell Inc.

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 1

Contents

Introduction ........................................................................................................................................................... 2

Section 1: Cabling a Dell™ PowerEdge™ R715 With a Cable Management Arm (CMA).......................... 2

1.1 Connecting the CMA Cables to the System ....................................................................................... 2

1.2 Routing the Power Cables Through the Strain Reliefs...................................................................... 3

1.3 Routing the Cables Through the CMA................................................................................................. 3

1.4 Left-Side Mounting Instructions ........................................................................................................... 3

1.5 Right-Side Mounting Instructions......................................................................................................... 5

Section 2: Cabling a Dell™ PowerEdge™ R715 System Without a CMA .................................................... 6

2.1 Routing the Cables .................................................................................................................................. 6

2.2 Removing the CMA Brackets for Shallow Racks ................................................................................ 6

Section 3: Replacing a Power Supply on a PowerEdge™ R715 System With a CMA ................................7

3.1 Replacing a Power Supply with a Left-Side Mounted CMA ..............................................................7

3.2 Replacing a Power Supply with a Right-Side Mounted CMA ...........................................................7

Table of Figures

Figure 1: System with Cables Installed .................................................................................................................. 2

Figure 2: Routing Power Cables Through the Strain Reliefs ............................................................................. 3

Figure 3: Routing the Cables Through the CMA ................................................................................................. 4

Figure 4: Left-Side Mounted CMA Installation..................................................................................................... 4

Figure 5: Right-Side Mounted CMA Installation .................................................................................................. 5

Figure 6: Cable Routing Without a CMA............................................................................................................... 6

Figure 7: Removing the CMA Brackets for Shallow Racks................................................................................. 6

Figure 8: Replacing the Power Supply ...................................................................................................................7

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 2

Introduction

This white paper covers recommended cable routing procedures for Dell™ PowerEdge™ R715

systems in the following racks:

•PowerEdge™ 4820/4220/2420

•PowerEdge™ 4210/2410

If you are using the optional CMA, following these procedures will allow you to extend the system

from the rack for service without powering down or disconnecting the cables. If you are not using the

CMA, following these procedures will ensure secure attachment and strain relief of the cables behind

the system. For guidelines on how to route cables within the rack, refer to the Dell

Best Practices

Guide for Rack Enclosure

white paper.

Section 1: Cabling a Dell™ PowerEdge™ R715 With a Cable Management

Arm (CMA)

This section details how to cable a PowerEdge™ R715 system using a CMA. If you are cabling the

system without the optional CMA, refer to Section 2.

Follow the instructions contained in the

Rack Installation Guide

in the rail kit to install the server into

the rack. Once installed, use these instructions to install the cables. All illustrations in the following

sections were created using a PowerEdge™ R715 system.

NOTE: PowerEdge™ R715 systems are not compatible with previous generation rails and CMAs.

1.1

Connecting the CMA Cables to the System

Attach the CMA tray to the back of the rails as described in the

CMA Installation Instructions

provided

in the CMA kit. Connect all applicable cables to the rear of the system and verify that all connections

are secure. See Figure 1.

Figure 1: System with Cables Installed

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 3

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.

Figure 2: Routing Power Cables Through the Strain Reliefs

1.3

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

1.4

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.

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 4

Figure 3: Routing the Cables Through the CMA

Figure 4: Left-Side Mounted CMA Installation

Cables entering the CMA should have

a small amount of slack to avoid cable

strain when the CMA is extended.

NOTE: Do not store excess cable

slack inside the CMA. The cable may

protrude through the CMA, thus

causing binding and potentially

damaging the cable.

KVM dongle placed inside the basket

for Left-Side Mounting.

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 5

1.5

Right-Side Mounting Instructions

1. Install the CMA on the rear right 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.

3. If the cable bundle includes a keyboard, video, and mouse (KVM) dongle, the cable may be too

short for the dongle to be placed in the CMA basket. Route the remainder of the cable beyond

the dongle through the CMA. DO NOT secure the dongle to the outside of the CMA as this may

restrict the ability of the CMA to support full extension of the rails without causing damage to the

dongle.See Figure 5.

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.

Figure 5: Right-Side Mounted CMA Installation

KVM dongle placed outside the

basket for Right-Side Mounting.

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 6

Section 2: Cabling a Dell™ PowerEdge™ R715 System Without a CMA

NOTE: The CMA on Dell™ PowerEdge™ R715 systems is optional. Without the CMA installed, the

system must be powered down and all cables disconnected before it can be removed from the rack.

2.1

Routing the Cables

1. Connect all applicable cables to the rear of the system and verify that all connections are secure.

2. Using the hook and loop straps supplied with the rail kit, bundle the cables and secure them to

either the left or right CMA attachment brackets as described in the

Rack Installation Instructions

See Figure 6 for an example of data cables secured to the left CMA bracket and power cables

secured to the right CMA bracket.

3. It is recommended that the cables be secured to the outer brackets, but cables may be secured to

the inner brackets as well if desired.

Figure 6: Cable Routing Without a CMA

2.2

Removing the CMA Brackets for Shallow Racks

If you are installing the system into a shallow rack (less than 1 meter deep) and you will not be

installing a CMA, the outer CMA brackets may be removed if necessary in order to allow the rails to fit

properly into the rack. Remove the brackets by using a #2 Phillips screwdriver to remove the screws

used to attach them to the rails as shown in Figure 7.

Figure 7: Removing the CMA Brackets for Shallow Racks

Cable Routing Procedures for Dell™ PowerEdge™ R715 Systems

Page 7

Section 3: Replacing a Power Supply on a PowerEdge™ R715 System With a

CMA

3.1

Replacing a Power Supply with a Left-Side Mounted CMA

1. If the bottom power supply must be replaced, then remove the tray from underneath the CMA

as described in the

CMA Installation Instructions

provided with the CMA kit. If the top power

supply must be replaced, this step can be skipped.

2. Swing the CMA to its service position.

3. Disconnect the power cord from the power supply and disengage the strain relief.

4. Replace the power supply.

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

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

3.2

Replacing a Power Supply with a Right-Side Mounted CMA

1. If the bottom power supply must be replaced, then remove the tray from underneath the CMA

as described in the

CMA Installation Instructions

provided with the CMA kit. If the top power

supply must be replaced, this step can be skipped.

2. Swing the CMA to its service position.

3. Disconnect the power cord from the power supply and disengage the strain relief.

4. Disconnect both CMA attachment housings from the rail as shown in Figure 8.

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

other hand as shown in Figure 8.

6. Reconnect the CMA attachment housings to the rail.

7. Plug in the power cord, re-engage the strain relief, replace the CMA support tray (if it was

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

Figure 8: Replacing the Power Supply

CMA attachment housings

have been disconnected.

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