Dell PowerEdge Rack Enclosure 4210 Cabling R720, PowerEdge Rack Enclosure 4210 Cabling R720xd White Paper

Cable Routing Procedures for Dell PowerEdge R720/R720xd Systems

Cable Routing Procedures for Dell™ PowerEdge™ R720/R720xd Systems

This Dell Technical White Paper explains the best practices for routing and securing the cables exiting the back of the R720/R720xd systems.

Greg Henderson and Jose L. Flores

Data Center Infrastructure Engineering

March 2012

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Cable Routing Procedures for Dell PowerEdge R720/R720xd Systems

This document 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.

© 2012 Dell Inc. All rights reserved. Dell and its affiliates cannot be responsible for errors or omissions in typography or photography. Dell, the Dell logo, and PowerEdge are trademarks of Dell Inc. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell disclaims proprietary interest in the marks and names of others.

March 2012| Rev 1.0

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Cable Routing Procedures for Dell PowerEdge R720/R720xd Systems
Contents
Introduction .............................................................................................................		4
Section 1: Cabling a PowerEdge R720/R720xd with a CMA......................................................		4
1.1.	Connecting the cables to the system ...................................................................	4
1.2.	Routing the power cables through the strain reliefs.................................................	5
1.3.	Installing the CMA ..........................................................................................	5
Section 2:	Replacing a power supply on a PowerEdge R720/R720xd system with a CMA .................	8
2.1.	Replacing a power supply with a left-side mounted CMA ...........................................	8
2.2.	Replacing a power supply with a right-side mounted CMA .........................................	8
Section 3:	Cabling a PowerEdge R720/R720xd system on sliding rails without a CMA ..................	10
3.1.	Routing the cables .......................................................................................	10
3.2.	Removing the outer CMA brackets for shallow racks ..............................................	10
Section 4: Cabling a PowerEdge R720/R720xd system installed on static rails ...........................		11
Figures
Figure 1.	System with cables installed .............................................................................	4
Figure 2.	Routing power cables through the strain reliefs......................................................	5
Figure 3.	Attaching the inner CMA attachment bracket ........................................................	5
Figure 4.	Routing the cables through the CMA....................................................................	6
Figure 5.	Left-side mounted CMA installation (preferred)......................................................	7
Figure 6.	Right-side mounted CMA installation (CMA shown in service position) ...........................	8
Figure 7.	Disconnecting the CMA attachment housings .........................................................	9
Figure 8.	Replacing the outer power supply ......................................................................	9
Figure 9.	Cable routing without a CMA...........................................................................	10
Figure 10.	Removing the outer CMA brackets for shallow racks ..............................................	10
Figure 11.	Cabling a system installed in static rails .............................................................	11

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Cable Routing Procedures for Dell PowerEdge R720/R720xd Systems

Introduction

This white paper covers recommended cable routing procedures for the Dell™ PowerEdge™ R720/R720xd systems in the following racks:

PowerEdge 2410, 4210

PowerEdge 2420, 4220, 4820 (including wide and deep versions)

PowerEdge Energy Smart 4020S, 4620S

If you are using the optional cable management arm (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. For additional details regarding potential interferences between the CMA and rear-mount power distribution units (PDUs) in Dell racks as well as general information about third party rack compatibility, refer to the Dell Enterprise Systems Rail Sizing and Rack Compatibility Matrix located at http://content.dell.com/us/en/enterprise/d/business~solutions~engineering- docs~en/Documents~rail-rack-matrix.pdf.aspx.

Section 1: Cabling a PowerEdge R720/R720xd with a CMA

This section details how to cable the PowerEdge R720/R720xd systems on sliding rails using a CMA. If you are cabling the system without the optional CMA, refer to Section 3.

Follow the instructions contained in the Rack Installation Instructions in the sliding 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 R720xd system.

NOTE: PowerEdge R720/R720xd systems are not compatible with the PowerEdge R710 rails and CMA.

1.1. Connecting the 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

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