Dell PowerEdge 2950 Bedienungsanleitung

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Dell™ PowerEdge™ 2950 Systems

Cabling Instructions for the

–48 VDC Power Supply

Dell™ PowerEdge™ 2950 系统

有关 -48 VDC 电源设备的

布线说明

book.book Page 1 Thursday, April 5, 2007 2:59 PM

book.book Page 2 Thursday, April 5, 2007 2:59 PM

www.dell.com | support.dell.com

Dell™ PowerEdge™ 2950 Systems

Cabling Instructions for the

–48 VDC Power Supply

book.book Page 1 Thursday, April 5, 2007 2:59 PM

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE:

A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: 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 Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

March 2007 P/N GJ891 Rev. A04

Cabling Instructions for the –48 VDC Power Supply 3

This document describes the requirements and wiring instructions for a –48 VDC power cable and safety

ground wire for systems equipped with a –48 VDC power supply.

CAUTION: This equipment is designed to permit the connection of the earthed conductor of the DC supply circuit

to the earthing conductor at the equipment. See installation instructions.

This equipment is designed to permit the connection of the earthed conductor of the DC supply circuit to the

earthing conductor at the equipment. If this connection is made, all of the following conditions must be met:

–This equipment shall be connected directly to the DC supply system earthing electrode conductor or to a

bonding jumper from an earthing terminal bar or bus to which the DC supply system earthing electrode

conductor is connected.

–This equipment shall be located in the same immediate area (such as, adjacent cabinets) as any other

equipment that has a connection between the earthed conductor of the same DC supply circuit and the

earthing conductor, and also the point of earthing of the DC system. The DC system shall not be earthed

elsewhere.

–The DC supply source shall be located within the same premises as this equipment.

–Switching or disconnecting devices shall not be in the earthed circuit conductor between the DC source and

the point of connection of the earthing electrode conductor.

CAUTION: A qualified electrician must perform all connections to DC power and safety grounds. The system

must be safety grounded at the cabinet frame. All electrical wiring must comply with applicable local or national

codes and practices.

CAUTION: The system chassis must be positively grounded to the rack cabinet frame.

Do not attempt to connect

power to the system until grounding cables are connected.

CAUTION: An energy hazard will exist if the safety ground cable is omitted or disconnected.

Precaution Statements

This product is intended for restricted access locations (dedicated equipment rooms, equipment closet,

or the like) in accordance with the National Electrical Code, American National Standards Institute

(ANSI)/National Fire Protection Association (NFPA) 70.

Wire the unit with copper only, unless otherwise specified, 10 American Wire Gauge (AWG) wire rated

minimum 90ºC in parallel for source and return. Protect the

–48 V (1 wire) with a branch circuit

overcurrent protection rated 30-A rated for DC with a high interrupt current rating.

Connect the equipment to a

–48 VDC supply source that is electrically isolated from the AC source (reliably

grounded 48 VDC SELV source). Ensure that the

–48 VDC source is efficiently secured to earth (ground).

A readily accessible disconnect device that is suitably approved and rated shall be incorporated in the

field wiring.

CAUTION: When stranded wiring is required, use approved wiring termination, such as closed-loop or

spade-type with upturned lugs. These terminations should be the appropriate size for the wires and must be

double crimped, one on the conductor and one on the insulation.

CAUTION: When installing the unit, the ground connection must always be made first and disconnected last to

prevent an energy hazard.

book.book Page 3 Thursday, April 5, 2007 2:59 PM

4Cabling Instructions for the –48 VDC Power Supply

CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a suitably installed

ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain

that suitable grounding is available.

Input Requirements

Kit Contents

• Tyco 556879-3 connector housing (1) or equivalent

• Tyco 556880-2 connector contacts (3) or equivalent

• AMP 2-320568-2 ring-tongue terminal (1) or equivalent

• #8-32 nut equipped with lock washer (1)

Required Tools

• Wire-stripper pliers capable of removing insulation from size 10 AWG solid or stranded, insulated

copper wire

NOTE: Use alpha wire part #3080 or equivalent (65/30 stranding)

• One UL 1015 10 AWG, 2 m maximum (stranded) black wire (–48 VDC)

• One UL 1015 10 AWG, 2 m maximum (stranded) red wire (48 VDC return)

• One UL 1015 10 AWG, 2 m maximum green, stranded wire (optional connector ground)

• One UL 1015 10 AWG, 2 m maximum green/yellow, green with a yellow stripe, stranded wire

(safety ground)

• AMP 90871-1 hand-crimping tool or equivalent

Supply voltage: –(48–60) VDC

Current consumption: 20 A maximum

book.book Page 4 Thursday, April 5, 2007 2:59 PM

Cabling Instructions for the –48 VDC Power Supply 5

Assembling the DC Input Power Cable

CAUTION: Before connecting safety ground or power cables to the connector, ensure that the power is removed

from the DC circuit. To ensure that the power is off, locate the circuit breaker on the DC source circuit. Switch the

circuit breaker to the off position and, if available, install an approved safety locking device to the circuit breaker

or switch, to prevent against another person energizing the circuit.

To construct the DC input power cable, perform the following steps:

Strip the insulation from the ends of the DC power wires, exposing approximately 4.5 mm

(0.175 inches) of copper wire.

Using a hand-crimping tool, crimp a connector contact to each DC power wire.

To connect the optional connector ground, insert the green 48 VDC ground into connector housing

position 1 (see Figure 1-1 and Table 1-1).

NOTICE: Figure 1-1 shows the connector housing and pin locations as viewed from the back of the connector.

Insert the black –48 VDC wire into connector housing position 2 (see Figure 1-1 and Table 1-1).

Insert the red 48 VDC return wire into connector housing position 3 (see Figure 1-1 and Table 1-1).

Figure 1-1. Tyco Connector 556879-3 Housing Positions (Viewed from Back of Connector)

Table 1-1. Connector Housing Pin Assignments

Pin Description Wire Color and Size

1 48 VDC ground (optional) Green 10 AWG

2 –48 VDC Black 10 AWG

3 48 VDC return Red 10 AWG

123

book.book Page 5 Thursday, April 5, 2007 2:59 PM

6Cabling Instructions for the –48 VDC Power Supply

Assembling and Connecting the Safety Ground Wire

Strip the insulation from the end of the green/yellow wire, exposing approximately 4.5 mm

(0.175 inches) of copper wire.

Using a hand-crimping tool, crimp the ring-tongue terminal to the green/yellow wire.

Connect the safety ground to the grounding post on the back of the system using a #8-32 nut

equipped with a locking washer (see Figure 1-2).

Figure 1-2. Power Supply Safety Ground

Connecting the –48 VDC Power Cable

To connect the –48 VDC power cable, plug the –48 VDC power cable into the system power supply.

1green/yellow safety ground 2grounding post 3locking washer

4#8-32 nut

123

book.book Page Thursday, April 5, 2007 2:59 PM

www.dell.com | support.dell.com

Dell™ PowerEdge™ 2950 系统

有关 -48 VDC 电源设备的

布线说明

book.book Page 7 Thursday, April 5, 2007 2:59 PM

注、注意和警告

注：注表示可以帮助您更好地使用计算机的重要信息。

注意：

注意表示可能会损坏硬件或导致数据丢失，并告诉您如何避免此类问题

警告：警告表示可能会导致财产损失、人身伤害甚至死亡。

____________________

本说明文件中的信息如有更改，恕不另行通知。

未经 Dell Inc. 书面许可，严禁以任何形式进行复制。

本文中使用的商标：Dell、DELL 徽标和 PowerEdge Dell Inc. 的商标。

本说明文件中述及的其它商标和产品名称指拥有相应商标和产品名称的公司或其制造的产品。Dell Inc. 对其它公司的商标和产

品名称不拥有任何所有权。

2007 年3 月P/N GJ891 修订版 A04

book.book Page 8 Thursday, April 5, 2007 2:59 PM

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