IBM iDataPlex Rack Type 7825 Installation And Service Manual

IBM iDataPlex Cluster Solutio n
Installation an d Service Guid e

IBM iDataPlex Cluster Solution
Installation an d Service Guid e

Note:
Before using this information and the product it supports, read the general information in Appendix B, “Getting help and technical assistance,” on page 47 and Appendix D, “Notices,” on page 53.
© Copyright International Business Machines Corporation 2008.
US Government Users Restricted Rights Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Contents

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . .v
Chapter 1. System overview . . . . . . . . . . . . . . . . . . . .1
The IBM Documentation CD of iDataPlex Rack Type 7825 . . . . . . . . .1
Hardware and software requirements . . . . . . . . . . . . . . . .1
Using the Documentation Browser . . . . . . . . . . . . . . . . .1
Related documentation . . . . . . . . . . . . . . . . . . . . . .3
Notices and statements in this document . . . . . . . . . . . . . . . .3
Chapter 2. Site preparation and requirements . . . . . . . . . . . . .5
Site preparation overview . . . . . . . . . . . . . . . . . . . . .5
Size and weight requirements . . . . . . . . . . . . . . . . . . . .6
Minimum service clearances for iDataPlex racks . . . . . . . . . . . .6
Space requirements (creating a floor plan) . . . . . . . . . . . . . . .10
Power requirements . . . . . . . . . . . . . . . . . . . . . . .11
Chapter 3. Cabling guidelines . . . . . . . . . . . . . . . . . . .13
Chapter 4. Installing the rack . . . . . . . . . . . . . . . . . . .15
Installation tools . . . . . . . . . . . . . . . . . . . . . . . .15
Unpacking the rack . . . . . . . . . . . . . . . . . . . . . . .17
Moving the rack . . . . . . . . . . . . . . . . . . . . . . . .20
Installing the stabilizer feet . . . . . . . . . . . . . . . . . . . .22
Installing the side panels . . . . . . . . . . . . . . . . . . . . .23
Removing and installing rack doors . . . . . . . . . . . . . . . . .23
Removing the front doors . . . . . . . . . . . . . . . . . . . .24
Installing the front doors . . . . . . . . . . . . . . . . . . . .24
Removing the rear door . . . . . . . . . . . . . . . . . . . .25
Installing the rear door . . . . . . . . . . . . . . . . . . . . .27
Installing an optional rear door heat exchanger . . . . . . . . . . . .30
Connecting power to the rack . . . . . . . . . . . . . . . . . . .30
Turning on the power to the cabinets . . . . . . . . . . . . . . . . .32
Attaching rack cabinets in a suite . . . . . . . . . . . . . . . . . .32
Removing and installing the casters . . . . . . . . . . . . . . . . .34
Removing the casters . . . . . . . . . . . . . . . . . . . . .34
Installing the casters . . . . . . . . . . . . . . . . . . . . . .34
Chapter 5. Power cord and rails . . . . . . . . . . . . . . . . . .35
Removing and installing a power cord . . . . . . . . . . . . . . . .35
Removing and installing rails . . . . . . . . . . . . . . . . . . . .36
Removing and installing 2U/3U chassis rails . . . . . . . . . . . . .36
Removing and installing optional device rails . . . . . . . . . . . . .39
Chapter 6. Accessing the cluster from a remote location . . . . . . . .43
Using the remote power command . . . . . . . . . . . . . . . . .43
Remote console . . . . . . . . . . . . . . . . . . . . . . . .43
Displaying server configuration information . . . . . . . . . . . . . . .43
Related topics . . . . . . . . . . . . . . . . . . . . . . . . .43
Appendix A. Error and event logs . . . . . . . . . . . . . . . . .45
Appendix B. Getting help and technical assistance . . . . . . . . . .47
Before you call . . . . . . . . . . . . . . . . . . . . . . . . .47
© Copyright IBM Corp. 2008 iii
Using the documentation . . . . . . . . . . . . . . . . . . . . .47
Getting help and information from the World Wide Web . . . . . . . . . .47
Software service and support . . . . . . . . . . . . . . . . . . .48
Hardware service and support . . . . . . . . . . . . . . . . . . .48
IBM Taiwan product service . . . . . . . . . . . . . . . . . . . .49
Appendix C. CRU and FRU information and part numbers . . . . . . .51
Appendix D. Notices . . . . . . . . . . . . . . . . . . . . . .53
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .53
Product recycling and disposal . . . . . . . . . . . . . . . . . . .54
Electronic emission notices . . . . . . . . . . . . . . . . . . . .55
Federal Communications Commission (FCC) statement . . . . . . . . .55
Industry Canada Class A emission compliance statement . . . . . . . .56
Avis de conformité à la réglementation d’Industrie Canada . . . . . . . .56
Australia and New Zealand Class A statement . . . . . . . . . . . .56
United Kingdom telecommunications safety requirement . . . . . . . . .56
European Union EMC Directive conformance statement . . . . . . . . .56
Taiwanese Class A warning statement . . . . . . . . . . . . . . .57
Chinese Class A warning statement . . . . . . . . . . . . . . . .57
Japanese Voluntary Control Council for Interference (VCCI) statement . . .57
Korean Class A warning statement . . . . . . . . . . . . . . . .57
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
iv IBM iDataPlex Cluster Solution: Installation and Service Guide

Safety

Before installing this product, read the Safety Information.
Antes de instalar este produto, leia as Informações de Segurança.
Pred instalací tohoto produktu si prectete prírucku bezpecnostních instrukcí.
Læs sikkerhedsforskrifterne, før du installerer dette produkt.
Lees voordat u dit product installeert eerst de veiligheidsvoorschriften.
Ennen kuin asennat tämän tuotteen, lue turvaohjeet kohdasta Safety Information.
Avant d’installer ce produit, lisez les consignes de sécurité.
Vor der Installation dieses Produkts die Sicherheitshinweise lesen.
Prima di installare questo prodotto, leggere le Informazioni sulla Sicurezza.
Les sikkerhetsinformasjonen (Safety Information) før du installerer dette produktet.
Antes de instalar este produto, leia as Informações sobre Segurança.
Antes de instalar este producto, lea la información de seguridad.
Läs säkerhetsinformationen innan du installerar den här produkten.
© Copyright IBM Corp. 2008 v
Important:
Each caution and danger statement in this document is labeled with a number. This number is used to cross reference an English-language caution or danger statement with translated versions of the caution or danger statement in the IBM Rack Safety Information document.
For example, if a caution statement is labeled “Statement 1,” translations for that caution statement are in the IBM Rack Safety
Information document under “Statement 1.”
Be sure to read all caution and danger statements in this document before you perform the procedures. Read any additional safety information that comes with the server or optional device before you install the device.
Statement 1:
CAUTION: To ensure safety, all configurations of the rack cabinet must be certified by a nationally recognized testing laboratory in order to verify compliance with country-specific safety regulations. This process ensures that the end product remains safe for the operator and service personnel under normal and forseeable misuse conditions.
Statement 2:
DANGER
Always lower the leveling pads on the rack cabinet.
v v Always install stabilizer brackets on the rack cabinet. v Always install servers and optional devices starting from the bottom of
the rack cabinet.
v Always install the heaviest devices in the bottom of the rack cabinet.
vi IBM iDataPlex Cluster Solution: Installation and Service Guide
Statement 4:
Electrical current from power, telephone, and communication cables is hazardous.
To avoid a shock hazard:
DANGER
Do not connect or disconnect any cables or perform installation,
v
maintenance, or reconfiguration of this product during an electrical storm.
v Connect all power cords to a properly wired and grounded electrical
outlet.
v Connect to properly wired outlets any equipment that will be attached to
this product.
v When possible, use one hand only to connect or disconnect signal
cables.
v Never turn on any equipment when there is evidence of fire, water, or
structural damage.
v Disconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.
v Connect and disconnect cables as described in the following table when
installing, moving, or opening covers on this product or attached devices.
To Connect: To Disconnect:
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors
4. Attach power cords to outlet.
1. Turn everything OFF.
2. First, remove power cords from outlet.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
5. Turn device ON.
Safety vii
Statement 6:
CAUTION: Do not place any object on top of a rack-mounted device unless that rack-mounted device is intended for use as a shelf.
Statement 7:
CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.
2
1
viii IBM iDataPlex Cluster Solution: Installation and Service Guide
Statement 8:
DANGER
Plug power cords from devices in the rack cabinet into electrical outlets
v
that are located near the rack cabinet and are easily accessible.
v Each rack cabinet might have more than one power cord. Be sure to
disconnect all power cords in the rack cabinet before servicing any device in the rack cabinet.
v Install an emergency-power-off switch if more than one power device
(power distribution unit or uninterruptible power supply) is installed in the same rack cabinet.
v Connect all devices installed in a rack cabinet to power devices installed
in the same rack cabinet. Do not plug a power cord from a device installed in one rack cabinet into a power device installed in a different rack cabinet.
Statement 9:
DANGER
Overloading
a branch circuit is potentially a fire hazard and a shock hazard
under certain conditions. To avoid these hazards, ensure that your system electrical requirements do not exceed branch circuit protection requirements. Refer to the information that is provided with your device for electrical specifications.
Safety ix
Statement 12:
CAUTION: See the instructions in the rack documentation before you install devices, remove devices, or relocate the rack.
Statement 13:
CAUTION: The weight of this part or unit is more than 55 kg (121.2 lb). It takes specially trained persons, a lifting device, or both to safely lift this part or unit. (C011)
>55 kg (121.2 lb)
55 kg ( 121.2 lb)
x IBM iDataPlex Cluster Solution: Installation and Service Guide

Chapter 1. System overview

This document contains site preparation, requirements, and installation instructions for the IBM® iDataPlex Rack Type 7825 and many of the common optional devices that you can install in the rack cabinet. Always read the documentation that comes with your server or optional device for detailed installation instructions.
The IBM iDataPlex Solution is a 43U high 120 cm (47.25 in.) wide rack cabinet that can hold up to 84 preconfigured 1U type servers, ac line voltage power distribution units (PDU), optional rack management hardware, and switch solutions.
Important:
To help maintain proper cooling for all components installed in the rack,
make sure that fillers are installed over all unoccupied bays.
This documentation might be updated occasionally to include information about new features, a translated version of the documentation might be available in your language, or technical updates might be available to provide additional information that is not included in this documentation. These updates are available from the IBM Web site. To check for updated documentation and technical updates, complete the following steps.
Note: Changes are made periodically to the IBM Web site. The actual procedure
might vary slightly from what is described in this document.
1. Go to http://www.ibm.com
2. Under Support & downloads, go to the Support by product menu and click
Systems and servers.
3. In the Product support box, click System x.
4. From the Product family menu, select System x iDataPlex Solution and click
Go.
5. To view iDataPlex Solution documentation, click Documentation in the Support
& downloads box. To view available device drivers and downloads, click Downloads.

The IBM Documentation CD of iDataPlex Rack Type 7825

The IBM Documentation CD contains documentation for your rack product in Portable Document Format (PDF) and includes the IBM Documentation Browser to help you find information quickly.

Hardware and software requirements

The IBM Documentation CD requires the following minimum hardware and software:
v Microsoft Windows XP, Windows 2000, or Red Hat Linux
v 100 MHz microprocessor
v 32 MB of RAM
v Adobe Acrobat Reader 3.0 (or later) or xpdf, which comes with Linux operating
systems

Using the Documentation Browser

Use the Documentation Browser to browse the contents of the CD, read brief descriptions of the documents, and view documents, using Adobe Acrobat Reader
© Copyright IBM Corp. 2008 1
or xpdf. The Documentation Browser automatically detects the regional settings in your computer and displays the documents in the language for that region (if available). If a document is not available in the language for that region, the English-language version is displayed.
Use one of the following procedures to start the Documentation Browser:
v If Autostart is enabled, insert the CD into the CD or DVD drive. The
Documentation Browser starts automatically.
v If Autostart is disabled or is not enabled for all users, use one of the following
procedures:
If you are using a Windows operating system, insert the CD into the CD or
DVD drive and click Start --> Run. In the Open field, type
e:\win32.bat
where e is the drive letter of the CD or DVD drive, and click OK.
If you are using Red Hat Linux, insert the CD into the CD or DVD drive; then,
run the following command from the /mnt/cdrom directory:
sh runlinux.sh
Select your rack product from the Product menu. The Available Topics list displays all the documents for your rack product. Some documents might be in folders. A plus sign (+) indicates each folder or document that has additional documents under it. Click the plus sign to display the additional documents.
When you select a document, a description of the document is displayed under Topic Description. To select more than one document, press and hold the Ctrl key while you select the documents. Click View Book to view the selected document or documents in Acrobat Reader or xpdf. If you selected more than one document, all the selected documents are opened in Acrobat Reader or xpdf.
To search all the documents, type a word or word string in the Search field and click Search. The documents in which the word or word string appears are listed in order of the most occurrences. Click a document to view it, and press Crtl+F to use the Acrobat search function, or press Alt+F to use the xpdf search function within the document.
Click Help for detailed information about using the Documentation Browser.
2 IBM iDataPlex Cluster Solution: Installation and Service Guide

Related documentation

This Installation and User's Guide provides general information about the rack, including information about planning and how to get help. In addition to this document, the printed Important Notices document and the following documentation is provided in Portable Document Format (PDF) on the IBM Documentation CD:
v Rack Safety Information
This document contains translated caution and danger statements. Each caution
and danger statement that appears in the documentation has a number that you
can use to locate the corresponding statement in your language in the Rack
Safety Information document.
v Warranty and Support Information
This document contains information about the terms of the warranty and getting
service and assistance.
v IBM System Cluster 1350 Installation and Service Guide
This document contains information about Cluster 1350 racks. To view this
document, or to find additional technical information and download device drivers
and other updates, complete the following steps:
1. Go to http://www.ibm.com
2. Under Support & downloads, go to the Support by product menu and click Systems and servers.
3. In the Product support box, click System x.
4. From the Product family menu, select Cluster 1350 and click Go.
5. To view System Cluster 1350 documentation, click Documentation in the
Support & downloads box. To view available device drivers and downloads, click Downloads.

Notices and statements in this document

The caution and danger statements that appear in this document are also in the multilingual IBM Rack Safety Information document, which is on the IBM
Documentation CD. Each statement is numbered for reference to the corresponding
statement in the IBM Rack Safety Information document.
The following notices and statements are used in this document:
v Note: These notices provide important tips, guidance, or advice. v Important: These notices provide information or advice that might help you avoid
inconvenient or problem situations.
v Attention: These notices indicate potential damage to programs, devices, or
data. An attention notice is placed just before the instruction or situation in which damage could occur.
v Caution: These statements indicate situations that can be potentially hazardous
to you. A caution statement is placed just before the description of a potentially hazardous procedure step or situation.
v Danger: These statements indicate situations that can be potentially lethal or
extremely hazardous to you. A danger statement is placed just before the description of a potentially lethal or extremely hazardous procedure step or situation.
Chapter 1. System overview 3
4 IBM iDataPlex Cluster Solution: Installation and Service Guide

Chapter 2. Site preparation and requirements

This chapter contains information about preparing the site and the requirements for installing the iDataPlex Rack Type 7825 cabinet.
Important: The information in this chapter applies only to the IBM iDataPlex Rack
Type 7825. If your IBM cluster solution contains an IBM 42U Enterprise Rack, see the IBM System Cluster 1350 Installation and Service Guide for the applicable specifications, installation procedures, cabinet placement instructions, and cabling guidelines.

Site preparation overview

Before you unpack or install the rack cabinet, complete the following tasks:
v Understand the rack cabinet specifications and requirements.
v Measure all door openings, ensuring that they are a minimum of 2110 mm (83
in.) high and 851 mm (33.5 in.) wide.
v Prepare a layout of the rack cabinet or suite of rack cabinets.
v Prepare the physical site (location) where you will install the rack cabinet.
v Read “Unpacking the rack” on page 17.
Physical
site planning includes determining the following factors:
v Floor area that is required by the equipment
v Floor-load capacity
v Space that is needed for future expansion
v Location of columns or other unmovable building structures
v Power and environmental requirements
a floor plan to check for clearance problems. If necessary, make a full-scale
Create template of the rack cabinet and carry it along the access route to check for potential clearance problems through doorways and passageways, around corners, and in elevators.
Remember to provide space for storage cabinets, card files, desks, communication facilities, daily storage of tapes, and other supplies.
Before you install the rack, prepare the site by making sure that the following requirements are met:
v There is enough space for the rack cabinet to pass safely by any pre-existing
equipment or facility fixtures.
v All necessary power and data cables are ready for installation in the rack cabinet.
v Any necessary cooling lines are ready for attachment to the rear door heat
exchanger. For information about the cooling lines, see the “IBM Rear Door Heat eXchanger for the iDataPlex Rack Installation and Maintenance Guide,” on the
IBM Documentation CD.
© Copyright IBM Corp. 2008 5

Size and weight requirements

The RackCenter Type 7825 is an Electronic Industries Alliance (EIA) standard rack cabinet. See Table 1 and Table 2 for the dimensions and weights of the rack cabinet.
The dimensions and weights shown are for the primary rack cabinet.
Note:
Expansion rack cabinets, where applicable, have the same physical dimensions but weigh less because they do not have side panels.
Table 1. IBM iDataPlex Rack Type 7825 cabinet physical dimensions
Configuration Dimensions
Rack cabinet with casters or front doors (no covers)
Rack cabinet (no doors, covers, or casters)
1200 mm x 840 mm x 2093 mm (47.25 in. x 33.07 in. x
82.4 in.)
1200 mm x 600 mm x 2093 mm (47.25 in. x 23.6 in. x
82.4 in.)
Rack cabinet and rear door 1200 mm x 844 mm x 2093 mm (47.25 in. x 33.23 in. x
82.4 in.)
Rack cabinet and side covers 1235 mm x 840 mm x 2093 mm (48.6 in. x 33.07 in. x
82.4 in.)
Rack cabinet, side covers, front and rear doors
1235 mm x 844 mm x 2093 mm (48.6 in. x 33.23 in. x
82.4 in.)
The optional IBM Rear Door Heat eXchanger for the iDataPlex Rack adds approximately 120 mm (5 in) to the depth of the rack when the casters are not installed.
Table 2. IBM iDataPlex Rack Type 7825 cabinet weights
Configuration Weight (approximate)
Empty 250 kg (551 lb)
Populated (rack, 42 2U chassis, 2
1270 kg (2800 lb)
Ethernet switches, 4 PDUs )

Minimum service clearances for iDataPlex racks

A rack cabinet requires a minimal service and operational clearance in the front and back to ensure proper ventilation and access to open the front and rear doors. An extended service clearance provides easier access to the rack cabinet so that you can install and service optional devices.
6 IBM iDataPlex Cluster Solution: Installation and Service Guide
610 mm
(24 in)
1200 mm (47.25 in)
610 mm
(24 in)
2000 mm (78.75 in)
(Maximum)
(2x) 17.5 mm
(0.7 in)
(Optional)
784.86 mm
480 mm (18.9 in)
(Minimum)
(30.9 in)
(Service
access space)
600 mm
(23.62 in)
500 mm
(15.75 in)
1010 mm (39.75 in)
Figure 1. Providing service and operational clearance for the IBM iDataPlex Rack Type 7825
When you attach iDataPlex rack cabinets together to form a suite of rack cabinets, you must keep a minimum distance between suites in the same room. See Figure 2 on page 8 for information on the minimum distance between suites. Make sure that the fronts or rears of rack cabinet suites face each other. This provides proper ventilation and allows access to install and service optional devices.
The access space that is needed to service the rack depends on the devices
Note:
that are installed and your installation and service agreement. Unless your installation and service agreement specifies a smaller minimum access space, maintain a space of 784.86 mm (30.9 in.) behind the rack when a rear door heat exchanger is installed.
Chapter 2. Site preparation and requirements 7
Space between iDataPlex racks
Note: Guidelines for space between racks:
• 600 mm or 24 in (no rear door heat exchangers installed)
• 1200 mm or 48 in (rear door heat exchangers installed)
** Depending on floor tile size. (European = 600 mm x 600 mm, English = 24 in. x 24in. )
Either
1200 mm
or 48 in **
600 mm (23.6 in)
See Note
Either
1200 mm
or 48 in
Space between iDataPlex racks in series
600 mm (23.6 in)
When you attach iDataPlex rack cabinets together to form a suite of rack cabinets, you must keep a minimum distance between suites in the same room. This distance provides proper ventilation and allows access to install and service optional devices.
Notes:
1. The access space that is needed to service the rack depends on the devices that are installed and your installation and service agreement. Unless your installation and service agreement specifies a smaller access space, use the distance guidelines in Figure 2.
2. For this layout, rear door heat exchangers must be installed.
** Depending on floor tile size. (European = 600 mm x 600 mm, English = 24 in. x 24 in.).
Either
1200 mm
or 48 in **
Either
1200 mm
or 48 in
Either
1200 mm
or 48 in
Figure 2. Leaving space between rack cabinet suites
The internal dimensions of the rack cabinet conform to the EIA standard EIA-310-D Cabinets, Racks, Panels, and Associated Equipment (1992). See Figure 3 on page
9 for rack cabinet internal dimensions.
8 IBM iDataPlex Cluster Solution: Installation and Service Guide
The internal measurements in the following illustration are of one column in the rack cabinet.
40.0 cm
(15.75 in)
Top View Front View
450 mm (17.7 in)
465 mm (18.3 in)
483.4 mm (19.0 in)
450 mm (17.7 in)
465 mm (18.3 in)
483.4 mm (19.0 in)
Figure 3. Measuring inside of the rack cabinet
All vertical rack cabinet measurements are given in rack units (U), where 1U is equal to 44.5 mm (1.75 in.) The U levels are marked on labels on the front and rear mounting flanges inside of the rack cabinet, as shown in Figure 4.
1 U
44.5 mm (1.75 in)
Figure 4. Measuring U levels within rack cabinets
Chapter 2. Site preparation and requirements 9

Space requirements (creating a floor plan)

To be sure that you have enough space for the rack cabinet or suite of rack cabinets, create a floor plan before you install any rack cabinets. You might have to prepare and analyze several plans before you choose a final one. If you install more than one rack cabinet in more than one installation stage, prepare a separate plan for each installation stage. Consider the following factors when you prepare each plan:
v Flow of work and personnel within the area
v Operator access to units, as required
v If the placement will be on a raised floor:
Maximum cable lengths
Positioning over a cooling register
Routing and maximum length of cooling lines for the rear door heat
exchanger, if necessary
v If the placement will not be on a raised floor:
Maximum cable lengths
Routing and maximum length of cooling lines for the rear door heat
exchanger, if necessary
Need for cable guards, ramps, or other similar items to protect equipment and
personnel
Location of any planned safety equipment
v
v Future expansion
with an accurate drawing of the installation area (blueprints and floor plans
Begin are appropriate). Be sure to include the following information in your floor plan:
v Service clearances that are required for each rack cabinet or suite of rack
cabinets
v If the placement will be on a raised floor:
Things that might obstruct cable or cooling line routes
The height of the raised floor
If the placement will not be on a raised floor:
v
The placement of cables and cooling lines to minimize obstruction.
The amount of cable that is required. (If the cable is routed indirectly between
rack cabinets, such as along walls or suspended from the ceiling, additional cable might be required.)
The amount of hose for cooling lines that is required. (If the cooling lines are
routed indirectly between rack cabinets, such as along walls or suspended from the ceiling, additional hose might be required.)
Locations of equipment, furniture, and building features:
v
Power receptacles.
Air conditioning equipment and controls. (Air conditioning outlets should be
located between fronts of facing suites of rack cabinets. Exhausts in the ceilings should be located between rears of rack suites.)
File cabinets, desks, and other office equipment.
Room emergency power-off controls.
All entrances, exits, windows, columns, and pillars.
10 IBM iDataPlex Cluster Solution: Installation and Service Guide
Review the final floor plan to ensure that cable lengths are not too long and that the rack cabinets have enough clearance.

Power requirements

The rack cabinet does not require electricity, but the servers and optional devices that you install inside a rack cabinet do require connection to properly wired and grounded electrical outlets. You might need an electrician to assist you with planning for electrical requirements. For example:
v Each rack cabinet requires at least one uninterruptible power supply or power
distribution unit (PDU) for servers and optional devices that you install in the rack cabinet.
v Each PDU or uninterruptible power supply requires a separate ac power branch
circuit.
v The input voltage-selection switch on each device that you install in the rack
cabinet must match the output voltage on the uninterruptible power supply or PDU.
v Power cords must match electrical outlets at the location where you install the
rack cabinet.
Review
Statement 8:
the following safety information as you plan for your rack cabinet.
DANGER
Plug power cords from devices in the rack cabinet into electrical outlets
v
that are located near the rack cabinet and are easily accessible.
v Each rack cabinet might have more than one power cord. Be sure to
disconnect all power cords in the rack cabinet before servicing any device in the rack cabinet.
v Install an emergency-power-off switch if more than one power device
(power distribution unit or uninterruptible power supply) is installed in the same rack cabinet.
v Connect all devices installed in a rack cabinet to power devices installed
in the same rack cabinet. Do not plug a power cord from a device installed in one rack cabinet into a power device installed in a different rack cabinet.
Chapter 2. Site preparation and requirements 11
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