Dell PowerEdge 2420, PowerEdge 4220, PowerEdge 4820, PowerEdge 4220W, PowerEdge 4220D Technical Manual

Rack Enclosures

Technical Guide

4820D

4820W

4220D

4220W

4820

4220

2420

Dell PowerEdge
2420, 4220, and 4820

An expanded
portfolio of rack
enclosures designed
to meet the
requirements of your
data center today
and tomorrow.

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.

Dell, the DELL logo, the DELL badge, EqualLogic, PowerEdge, PowerVault, PowerConnect, and ReadyRails 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.

©Copyright 2012 Dell Inc. All rights reserved. Reproduction or translation of any part of this work beyond that
permitted by U.S. copyright laws without the written permission of Dell Inc. is unlawful and strictly forbidden.

September 2012 | Version 2.0

ii PowerEdge Rack Enclosures Technical Guide

Table of contents

1 System overview ..................................................................................................................................................................5

Introduction .........................................................................................................................................................................5

Benefits .................................................................................................................................................................................5

2 Rack enclosure features ..................................................................................................................................................... 7

Enclosure specifications .................................................................................................................................................... 7

Comparison of PowerEdge rack enclosures ................................................................................................................ 8

3 Rack enclosure views and features ................................................................................................................................. 9

PowerEdge 2420 rack enclosures .................................................................................................................................. 9

PowerEdge 4220 and 4820 rack enclosures ............................................................................................................. 10

Rack interior features ....................................................................................................................................................... 15

4 Thermal and airflow considerations ..............................................................................................................................18

Thermal and airflow features ..........................................................................................................................................18

5 Installing rack enclosures ................................................................................................................................................ 19

Adjustable mounting posts ............................................................................................................................................. 19

Dell ReadyRails and ReadyRails II ................................................................................................................................... 19

Cable management arm (CMA) ..................................................................................................................................... 21

6 Rack kit accessories ......................................................................................................................................................... 22

Thermal solutions ............................................................................................................................................................ 22

Power solutions ............................................................................................................................................................... 23

Management solutions ................................................................................................................................................... 24

Additional accessories .................................................................................................................................................... 26

Accessory compatibility table ........................................................................................................................................ 27

7 Rack packaging options .................................................................................................................................................. 28

8 Mechanical drawings ....................................................................................................................................................... 29

Appendix A. Regulatory certifications .......................................................................................................................... 36

Appendix B. Documentation and resources .............................................................................................................. 37

Tables

Table 1. Benefits....................................................................................................................................................................5

Table 2. Basic rack specifications ...................................................................................................................................... 7

Table 3. Rack features and specifications ........................................................................................................................ 7

Table 4. Comparison of PowerEdge rack enclosures ................................................................................................... 8

Table 5. Blanking panel options ...................................................................................................................................... 22

Table 6. Rack accessories for Dell rack enclosures ..................................................................................................... 27

Table 7. Packaging options for Dell rack enclosures .................................................................................................. 28

Table 8. Additional resources .......................................................................................................................................... 37

Figures

Figure 1. Front, rear, and frame views of the 2420 rack enclosure ............................................................................. 9

Figure 2. Top view of the 2420 rack enclosure ............................................................................................................. 10

Figure 3. Front view and features ..................................................................................................................................... 10

Figure 4. Back view of the 4220 rack enclosures .......................................................................................................... 11

Figure 5. Back view of the 4820 rack enclosures .......................................................................................................... 12

Figure 6. Side view of the 4220 rack enclosures ............................................................................................................ 12

Figure 7. Side view of the 4820 rack enclosures ........................................................................................................... 13

Figure 8. Top view of the rack enclosures ......................................................................................................................14

Figure 9. Tail bar access for cables ................................................................................................................................... 15

iii PowerEdge Rack Enclosures Technical Guide

Figure 10. Vertical- mount power distribution unit trays ................................................................................................. 16

Figure 11. Casters and leveling feet .................................................................................................................................... 16

Figure 12. Stabilizer feet ........................................................................................................................................................ 17

Figure 13. Front, side, and rear latches and locks ............................................................................................................ 17

Figure 14. Adjustable vertical mounting posts .................................................................................................................. 19

Figure 15. ReadyRails II and ReadyRails mounting kits................................................................................................... 20

Figure 16. Cable management arm .................................................................................................................................... 21

Figure 17. External dimensions – 4820 rack enclosure ................................................................................................. 29

Figure 18. External dimensions – 4220 rack enclosure ................................................................................................. 29

Figure 19. External dimensions – 2420 rack enclosure ................................................................................................. 30

Figure 20. Internal dimensions – 2420, 4220, 4820 (top and bottom views) ........................................................... 30

Figure 21. Internal dimensions – 2420, 4220, 4820 (leveling foot/minimum clearance) ........................................ 31

Figure 22. External dimensions – 4820D rack enclosure ............................................................................................... 31

Figure 23. External dimensions – 4220D rack enclosure .............................................................................................. 32

Figure 24. Internal dimensions – 4220D and 4820D (top and bottom views) .......................................................... 32

Figure 25. Internal dimensions – 4220D and 4820D (leveling foot/minimum clearance) ..................................... 33

Figure 26. External dimensions – 4820W rack enclosure ............................................................................................. 33

Figure 27. External dimensions – 4220W rack enclosure ............................................................................................. 34

Figure 28. Internal dimensions – 4220W and 4820W (top and bottom views)......................................................... 34

Figure 29. Internal dimensions – 4220W and 4820W (leveling foot/minimum clearance) .................................... 35

iv PowerEdge Rack Enclosures Technical Guide

1 System overview

Introduction

The Dell™ PowerEdge™ rack enclosures are designed to hold and protect server, network and data
storage equipment. The Dell rack is a sturdy, practical design and solidly built, delivered with
Enterprise service, support and reliability. The Dell PowerEdge rack enclosures are offered in three
height options: 24U (2420), 42U (4220), and 48U (4820); each of these racks is available in the
standard 600mm x 1070mm dimensions, to fit within a two-tile floor plan layout.

Dell has introduced both wide and deep versions of the PowerEdge rack enclosures to address
specific market requirements for additional space for power and cable management. The 42U and
48U heights are available in the wide form factor, 750mm wide x 1070mm deep, and the deep form
factor, 600mm wide x 1200mm deep. The Dell racks are complemented with a range of products
that include basic, metered, and managed power distribution units (PDUs), rack- mount
uninterruptible power supplies (UPSs), digital keyboard/video/monitors (KVMs), and other
accessories.

All of these form factors adhere to the EIA- 310- E standard for rack mounting of electronics,
ensuring that the mounting posts for installing components are configured for 19- inch equipment,
while the exterior of the rack is set to the specified dimensions. This ensures compatibility with
existing equipment while providing more options for cable and power cord routing. Not only do Dell
PowerEdge servers fit in these 19-inch racks, but other Enterprise equipment fit as well, including
Dell PowerVault™ and Dell EqualLogic™ storage, and Dell PowerConnect™ networking switches,
plus routers, hubs, and telephony equipment. Built with adjustable vertical mounting posts within
the rack, Dell racks are designed for use in almost any environment, such as an Enterprise data
center, a high-performance computing center, a remote office, a wiring closet, or a factory floor.

Benefits

Table 1 lists the benefits of the rack enclosures.

Table 1. Benefits

Benefits Detailed descriptions

Height options Dell PowerEdge rack enclosures offer three height options: 24U, 42U, and 48U

Form factors 42U and 48U are available in standard, wide, and deep form factors

Door design Excellent airflow with 80% perforated doors

Cabling and PDUs Superb design facilitates more cabling and power distribution options

With a static load rating of 2,500 lbs and three form factors to choose from, the PowerEdge 42U
and 48U rack enclosures can provide the capacity you need to hold a full complement of data
center equipment. These sizes are available in three form factors:

• Standard: 600mm wide x 1070mm deep

• Wide: 750mm wide x 1070mm deep

• Deep: 600mm wide x 1200mm deep

5 PowerEdge Rack Enclosures Technical Guide

Wide (750mm) racks in both 42U and 48U heights have three inches more space on each side for
cables and PDUs for networking, blade server and other installations that need to route cables along
the sides. The wide design of the 4820W and 4220W also moves the PDU trays even farther away
from the rack mounting posts, allowing more room for cables in the sides and back, helping reduce
contention between power cords, cables and installed equipment.

Deep (1200mm) racks offer more space in the back for cables and PDUs for high- density
installations. The 4820D and 4220D racks have extended PDU trays in the back of the rack, which
can hold up to four vertical- mount full-height PDUs on each side. This extra space can be used for
additional power management or for routing cables. PDUs can also be mounted with a 90-degree
rotation so that the power cords point toward the back of the rack rather than toward the middle.

6 PowerEdge Rack Enclosures Technical Guide

2 Rack enclosure features

Table 2 contains the basic specifications for the rack dimensions and weights, while Table 3 provides
more details on features and specifications for the rack enclosures.

Enclosure specifications

Table 2. Basic rack specifications

Dimensions

Standard rack
enclosure

Deep rack
enclosure

Wide rack
enclosure

PowerEdge 4820
48U rack enclosure

Height 89.5" (2273mm)
Width 23.8" (605mm)
Depth 42.1" (1070mm)

Weight 315 lbs (143 kg)

Height 89.5" (2273mm)
Width 23.8" (605mm)
Depth 47.2" (1200mm)

Weight 342 lbs (155 kg)

Height 89.5" (2273mm)
Width 29.8" (755mm)
Depth 42.1" (1070mm)

Weight 351 lbs (159 kg)

PowerEdge 4220
42U rack enclosure

Height 78.7" (1999mm)
Width 23.8" (605mm)
Depth 42.1" (1070mm)

Weight 298 lbs (135 kg)

Height 78.7" (1999mm)
Width 23.8" (605mm)
Depth 47.2" (1200mm)

Weight 318 lbs (144 kg)

Height 78.7" (1999mm)
Width 29.8" (755mm)
Depth 42.1" (1070mm)

Weight 335 lbs (152 kg)

Table 3. Rack features and specifications

Features Rack technical specifications

• Static load rating of 2,500 lbs for 48U/42U and 1,500 lbs for 24U

• Large open base for cable entry and exit

• Rack- top cable exits with adjustable, sliding door and removable tail bar

• Reversible front door can be configured to open from left or right, with lock

• Dual rear doors with lock (same key as front door)

• Split side panels, with locks (same key as doors)

• Removable front and rear doors have an 80% open perforation pattern to aid

Rack form factor

in thermal management

• Reinforced frame for stability

• Adjustable square- hole EIA mounting posts can be positioned forward or

backward within the rack

• U-space numerical markings on both front and rear mounting posts

• Rear- mount vertical PDU trays

• Rotating rear casters to easily position rack

• Easily accessible leveling feet

PowerEdge 2420
24U rack enclosure

Height 47.3" (1202mm)
Width 23.8" (605mm)
Depth 42.1" (1070mm)

Weight 209 lbs (95 kg)

Rack color Black with aluminum accents

Products supported

7 PowerEdge Rack Enclosures Technical Guide

All Dell and third- party rack- mount equipment compliant to the EIA-310- E
standard

Features Rack technical specifications

Shipping options

Standard ground shipping pallet
Air freight container

Comparison of PowerEdge rack enclosures

Table 4 compares the basic specifications of the rack enclosure portfolio.

Table 4. Comparison of PowerEdge rack enclosures

Features Dell 2420 Dell 4220/4820 Dell 4220W/4820W Dell 4220D/4820D

U Spaces 24U 42U/48U 42U/48U 42U/48U

Height (mm) 1202 1999/2273 1999/2273 1999/2273

Width (mm) 605 605 755 605

Depth (mm) 1070 1070 1070 1200

Static load
capacity

Vertical PDU
capacity

1500 pounds 2500 pounds 2500 pounds 2500 pounds

Up to 4 HH

1

Up to 4 FH

2

Up to 8 HH

Up to 4 FH

Up to 8 HH

Up to 8 FH

Up to 16 HH

0U access Limited Limited Improved Limited

1

Half- height

2

Full- height

8 PowerEdge Rack Enclosures Technical Guide

3 Rack enclosure views and features

The Dell PowerEdge rack enclosures provide important power distribution, cooling and cabling
options for a range of Enterprise environments, including high density installations such as HPC and
newer/reconfigured data centers where the facilities are equipped to support higher thermal and
power loads per rack.

All Dell racks offer enhanced power management, efficient cooling, and simplified component
mounting and storage for a wide range of IT equipment. The PowerEdge 4820 rack enclosure is
designed for high-density data centers where floor space is at a premium. The PowerEdge 4220
rack enclosure is designed to provide Enterprise efficiency for all sizes of data centers, while the
PowerEdge 2420 rack enclosure provides a compact option.

PowerEdge 2420 rack enclosures

The PowerEdge 2420 rack enclosure is very similar to its larger family members, but does have
some specific differences.

• Most noticeably, the rack is 24U high, providing a compact enclosure for smaller data rooms.

• The static load capacity of the 24U rack is 1,500 pounds.

• The top canopy is not perforated, thereby providing a solid surface on the top of the rack.

• The lower height accommodates up to four of the half- height vertical PDU offerings.

Figure 1 and Figure 2 show the various external views specific to the 2420 rack enclosure.

Front Rear Frame

Figure 1. Front, rear, and frame views of the 2420 rack enclosure

9 PowerEdge Rack Enclosures Technical Guide

Figure 2. Top view of the 2420 rack enclosure

PowerEdge 4220 and 4820 rack enclosures

The PowerEdge 4220 and 4820 rack enclosures have identical features except the 4820 rack
enclosure adds 6U of height.

• 42U and 48U heights are available in standard (600mm x 1070mm), wide (750mm x

1070mm) and deep (600mm x 1200mm) form factors.

• Static load capacity of the 42U and 48U racks is 2,500 pounds.

• Top canopy is perforated, providing a path for airflow through the top of the rack.

The following sections and figures show the various external views specific to the 4220 and 4820
rack enclosure options.

4220, 4220D 4220W 4820, 4820D 4820W

Figure 3. Front view and features

10 PowerEdge Rack Enclosures Technical Guide

The wide and deep racks have the same design style as the standard 4220 and 4820 racks. In fact,
the deep racks look the same as the standard racks in a straight- on front or back exterior view, but
the extended depth can be seen in a side view. The additional 3 inches added on each side of the
wide rack are noticeable in the front and rear view of the rack, but from the side, the wide racks look
the same as the standard racks.

Dell rack enclosures have faster and easier access to the rear of rack with a single latch for both
doors. All of the 42U and 48U racks have two-piece side panels for easier removal and access to the
sides of the IT equipment and cables, as well as a split rear door design that includes a single latch
mechanism.

4220 4220D 4220W

Figure 4. Back view of the 4220 rack enclosures

11 PowerEdge Rack Enclosures Technical Guide

4820D 4820W

Figure 5. Back view of the 4820 rack enclosures

4220D 4220, 4220W

Figure 6. Side view of the 4220 rack enclosures

12 PowerEdge Rack Enclosures Technical Guide