ac-dc power module user guide(03)(pdf)-en

AC/DC Power Module

User Guide

Issue 03

Date 2012-09-15

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 03 (2012-09-15) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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http://www.huawei.commailto:[email protected]

About This Document

OverviewThis document describes functions, structure, and installation procedures of the AC/DC powermodule.

Product VersionThe following table lists the product versions related to this document.

Product Name Product Version

DBS3900 V100R004C00 and later versions

DBS3900 GSM V100R013C00 and later versions

V300R013C00 and later versions

DBS3900 WCDMA V200R013C00 and later versions

DBS3900 LTE V100R003C00 and later versions

Intended AudienceThis document is intended for:

l Field engineersl Base station installation personnell System engineers

Organization1 Changes in the AC/DC Power Module User Guide

This chapter describes the changes in each version of the AC/DC Power Module User Guide.

2 Overview

AC/DC Power ModuleUser Guide About This Document


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This chapter describes the function, exterior, ports, cables, and technical specifications of theAC/DC power module.

3 Installing an AC/DC Power Module and an RRU

This chapter describes the procedure for installing an AC/DC power module and an RRU.

4 Replacing an AC/DC Power Module and an RRU

An AC/DC power module and a DC RRU constitute an AC RRU. The AC RRU, BBU, and otherdevices form a distributed base station. Replacing an AC RRU interrupts all the services carriedby the base station and generates alarms.

5 Appendix

ConventionsSymbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or savetime.

Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are inCourier New.



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Command Conventions

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.



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Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without movingthe pointer.

Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.

Drag Press and hold the primary mouse button and move thepointer to a certain position.



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Contents

About This Document.....................................................................................................................ii

1 Changes in the AC/DC Power Module User Guide...............................................................1

2 Overview.........................................................................................................................................32.1 Function..............................................................................................................................................................42.2 Exterior...............................................................................................................................................................52.3 Ports....................................................................................................................................................................62.4 Cables.................................................................................................................................................................7

2.4.1 Cable List...................................................................................................................................................72.4.2 Equipotential Cable...................................................................................................................................82.4.3 Output Power Cable...................................................................................................................................92.4.4 Input Power Cable...................................................................................................................................102.4.5 Alarm Cable.............................................................................................................................................142.4.6 External Alarm Cable..............................................................................................................................15

2.5 Technical Specifications...................................................................................................................................17

3 Installing an AC/DC Power Module and an RRU................................................................183.1 Installing an AC/DC Power Module onto an RRU..........................................................................................193.2 Installing the RRU............................................................................................................................................213.3 Installing Cables for an AC/DC Power Module...............................................................................................223.4 Installing a Surge Protection Box.....................................................................................................................27

3.4.1 Dimensions and Installation Clearance Requirements of a Surge Protection Box..................................273.4.2 Installation Options..................................................................................................................................293.4.3 Installing a Surge Protection Box............................................................................................................303.4.4 Installing Cables for an AC Surge Protection Box..................................................................................333.4.5 Installing Cables for a DC Surge Protection Box....................................................................................37

4 Replacing an AC/DC Power Module and an RRU................................................................42

5 Appendix.......................................................................................................................................445.1 Preparing OT Terminals for Connecting One End of the Power Cable to the AC Surge Protection Box.......455.2 Preparing OT Terminals for Connecting One End of the Power Cable to the DC Surge Protection Box.......475.3 Preparing a 3-Pin Round Connector Used for Connecting One End of the AC Input Power Cable to an AC/DCPower Module.........................................................................................................................................................50

AC/DC Power ModuleUser Guide Contents


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5.4 Preparing a 3-Pin Round Connector Used for Connecting One End of the DC Input Power Cable to an AC/DCPower Module.........................................................................................................................................................54

AC/DC Power ModuleUser Guide Contents


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1 Changes in the AC/DC Power Module UserGuide

This chapter describes the changes in each version of the AC/DC Power Module User Guide.

03 (2012-09-15)This is the third official release.

Compared with 02 (2012-06-10), this issue does not add any information.

Compared with 02 (2012-06-10), this issue includes the following changes:

Topic Change Description

2.4.1 Cable List Changed the information of the alarm cablefor AC/DC power module.

2.4.5 Alarm Cable

3.1 Installing an AC/DC Power Moduleonto an RRU

Added the scenario of installing AC/DCpower module onto the RRU.

3.3 Installing Cables for an AC/DC PowerModule

Added the scenario of installing the alarmcable for AC/DC power module.

Compared with 02 (2012-06-10), no information is deleted from this issue.

02 (2012-06-10)This is the second official release.

Compared with 01 (2012-04-25), this issue does not add any information.

Compared with 01 (2012-04-25), this issue includes the following changes:


3.1 Installing an AC/DC Power Moduleonto an RRU

Changed the figure of the attachment plate ofAC/DC power module.

AC/DC Power ModuleUser Guide 1 Changes in the AC/DC Power Module User Guide


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4 Replacing an AC/DC Power Module andan RRU

Compared with 01 (2012-04-25), no information is deleted from this issue.

01 (2012-04-25)This is the first official release.

Compared with draft B (2012-03-20), this issue does not include any modification.

Draft B (2012-03-20)This is a draft.

Compared with draft A (2012-01-10), this issue does not add any information.

Compared with draft A (2012-01-10), this issue includes the following changes:



Changed the sequence of installing cables.

2.4.2 Equipotential Cable Deleted the requirement that OT terminalsmust be added to both ends of theequipotential cable onsite.


Interchanged the sequence of two sections:Installing the RRU and Installing Cables foran AC/DC Power Module.

3.2 Installing the RRU

4 Replacing an AC/DC Power Module andan RRU

Added the procedures for replacing the AC/DC power module and RRU.

Compared with draft A (2012-01-10), no information is deleted from this issue.

Draft A (2012-01-10)This is a draft.

AC/DC Power ModuleUser Guide 1 Changes in the AC/DC Power Module User Guide


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2 OverviewAbout This Chapter

This chapter describes the function, exterior, ports, cables, and technical specifications of theAC/DC power module.

2.1 FunctionThe model of the AC/DC power module is MPW800-48A. It is an auxiliary product speciallydesigned for Huawei DC RRU and used to convert external AC input power into -48 V DC forthe DC RRU.

2.2 ExteriorThis section describes the exterior and dimensions of an AC/DC power module.

2.3 PortsThis section describes the ports on the panel of an AC/DC power module.

2.4 CablesThis section describes cables for an AC/DC power module.

2.5 Technical SpecificationsThis section describes the technical specifications of the AC/DC power module.

AC/DC Power ModuleUser Guide 2 Overview


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2.1 FunctionThe model of the AC/DC power module is MPW800-48A. It is an auxiliary product speciallydesigned for Huawei DC RRU and used to convert external AC input power into -48 V DC forthe DC RRU.

An AC/DC power module and a DC RRU constitute an AC RRU. The AC RRU applies mainlyto areas with convenient AC power supply but no DC power supply.

The external input power supported by the AC/DC power module:l 220 V or 110 V AC inputl 180 V to 400 V high-voltage DC input (China)

The AC/DC power module supports four scenarios, as shown in Figure 2-1, Figure 2-2, Figure2-3, and Figure 2-4.

The scenarios in Figure 2-2 and Figure 2-4 apply only to China.

Figure 2-1 Indoor AC power supply

Figure 2-2 Indoor high-voltage DC power supply (China)

Figure 2-3 Outdoor AC power supply



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Figure 2-4 Outdoor high-voltage DC power supply (China)

2.2 ExteriorThis section describes the exterior and dimensions of an AC/DC power module.

Figure 2-5 shows the exterior of an AC/DC power module.

Figure 2-5 Exterior of an AC/DC power module

The dimensions of the AC/DC power module are 390 mm x 208 mm x 75 mm (15.35 in. x 8.19in. x 2.95 in.). Figure 2-6 shows the dimensions of an AC/DC power module.



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Figure 2-6 Dimensions of an AC/DC power module

2.3 PortsThis section describes the ports on the panel of an AC/DC power module.

Figure 2-7 shows the ports on the panel of an AC/DC power module.

Figure 2-7 Ports on the panel

Table 2-1 describes ports and indicators on the panel of an AC/DC power module.



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Table 2-1 Ports and indicators on the panel of an AC/DC power module

No. Silkscreen Description

1 RUN Indicator, which has thefollowing status:l When it is steady green,

the power supply isworking properly.

l When it is steady off,there is no power supply.

2 EXT_ALM_B Alarm port on the AC/DCpower module

3 Output: -48V Port for power output

4 EXT_ALM_A External alarm port on theAC/DC power module

5 Input:~100-240V Port for power input

6 - Ground terminal

2.4 CablesThis section describes cables for an AC/DC power module.

2.4.1 Cable ListThis section describes cables for an AC/DC power module.

Table 2-2 lists the cables for an AC/DC power module.

Table 2-2 Cable list for an AC/DC power module

Cable One End The Other End

Connector InstallationPosition


2.4.2Equipotential Cable

OT terminal (6mm2 or 0.01 in.2, M6)

Groundterminal on theAC/DC powermodule

OT terminal (6mm2 or 0.01 in.2,M6)

Ground terminalon the RRU

2.4.3 OutputPower Cable

PG connector PWR OUT porton the AC/DCpower module

Tool-less femaleconnector(pressfit type)

RRU/NEG(-),RTN(+)



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Cable One End The Other End



2.4.4 InputPower Cable

3-pin roundconnector

PWR IN port onthe AC/DCpower module

Bare wire Power device

OT terminal AC surgeprotection box

3-pin roundconnector

PWR IN port onthe AC/DCpower module

OT terminal AC surgeprotection box

2.4.5 AlarmCable

WaterproofDB9 maleconnector

EXT_ALM_Bport on the AC/DC powermodule


EXT_ALM porton the RRU

2.4.6ExternalAlarm Cable


EXT_ALM_Aport on the AC/DC powermodule

Bare wire External alarmdevice

2.4.2 Equipotential CableThe equipotential cable connects the AC/DC power module and the DC RRU to ensure propergrounding of the AC/DC power module.

Exterior

An equipotential cable is green and yellow and has a cross-sectional area of 6 mm2 (0.01 in.2).Both ends of the cable are OT terminals. Figure 2-8 shows the exterior of an equipotential cable.

Figure 2-8 Exterior of an equipotential cable

(1) M6 OT terminal with a cross-sectional area of 6 mm2 (0.01 in.2)

NOTE

You can determine the color of the cable and whether to use corresponding ground terminals based on localregulations.



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2.4.3 Output Power CableThe output power cable feeds -48 V DC power to an RRU from an AC/DC power module.

Exterior

The cross-sectional area of the output power cable is 4 mm2 (0.01 in.2). The cable has a PGconnector at one end and a tool-less female connector (pressfit type) at the other end. Theexteriors of the output power cables connected to different tool-less female connectors (pressfittype) are different, as shown in Figure 2-9 and Figure 2-10.

Figure 2-9 Exterior of a DC output power cable

Figure 2-10 Exterior of a DC output power cable

Pin AssignmentThe output power cable has two wires. Table 2-3 and Table 2-4 describe the pin assignment forthe wires.

Table 2-3 Pin assignment for the wires of a DC output power cable (North American standards)

Wire Color

NEG(-) Blue

RTN(+) Black



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Table 2-4 Pin assignment for the wires of a DC output power cable (European standards)

Wire Color

NEG(-) Blue

RTN(+) Brown

2.4.4 Input Power CableThe input power cable feeds -48 V DC power to the AC/DC power module from the externalpower device.

Exterior of an AC Input Power CableFigure 2-11 shows the exterior of the power cable between an AC/DC power module and theexternal power supply when no AC surge protection box is configured. The cross-sectional areaof the power cable between the AC/DC power module and the external power supply is 1.5mm2 (0.002 in.2).

Figure 2-11 Exterior of the power cable between an AC/DC power module and the externalpower supply

(1) 3-pin round connector (2) Bare wire

Figure 2-12 shows the exterior of the power cable between an AC/DC power module and anAC surge protection box when an AC surge protection box is configured. The cross-sectionalarea of the power cable between the AC/DC power module and the AC surge protection box is1.5 mm2 (0.002 in.2).



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Figure 2-12 Exterior of the power cable between an AC/DC power module and an AC surgeprotection box

(1) 3-pin round connector (2) OT terminal

Figure 2-13 shows the exterior of the power cable between an AC surge protection box and theexternal power supply when an AC surge protection box is configured. The cross-sectional areaof the power cable between an AC surge protection box and the external power supply is 4mm2 (0.01 in.2).

Figure 2-13 Exterior of the power cable between an AC surge protection box and the externalpower supply

(1) OT terminal (2) Bare wire

Pin Assignment for Wires of an AC Input Power CableTable 2-5 describes the pin assignment for the wires of the power cable between an AC/DCpower module and the external power supply.



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Table 2-5 Pin assignment for the wires of the power cable for the AC/DC power module (noAC surge protection box is configured)

One End (on theAC/DC PowerModule Side)

The Other End (onthe External PowerSupply Side)

Color Description

X1.L(+) Bare wire Brown L

X1.N(-) Blue N

X1.PE Green and yellow PE

Table 2-6 describes the pin assignment for the wires of the power cable between an AC/DCpower module and an AC surge protection box.

Table 2-6 Pin assignment for the wires of the power cable between an AC/DC power moduleand an AC surge protection box


The Other End (onthe DC SurgeProtection BoxSide)

Color Description

X1.L(+) X2 Brown L

X1.N(-) X3 Blue N

X1.PE X4 Green and yellow PE

Table 2-7 describes the pin assignment for the wires of the power cable between an AC surgeprotection box and the external power supply.

Table 2-7 Pin assignment for the wires of the power cable between an AC surge protection boxand the external power supply

One End (on theAC SurgeProtection BoxSide)


Color Description

X3 Bare wire Brown L

X1 Blue N

X2 Green and yellow PE

Exterior of the High-Voltage DC Input Power CableFigure 2-11 shows the exterior of the power cable between an AC/DC power module and theexternal power supply when no high-voltage DC surge protection box is configured. The cross-



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sectional area of the power cable between the AC/DC power module and the power device is1.5 mm2 (0.002 in.2).

Figure 2-14 shows the exterior of the power cable between an AC/DC power module and ahigh-voltage DC surge protection box when a high-voltage DC surge protection box isconfigured. The cross-sectional area of the power cable between the AC/DC power module andthe DC surge protection box is 1.5 mm2 (0.002 in.2).

Figure 2-14 Exterior of the power cable between an AC/DC power module and a DC surgeprotection box

(1) 3-pin round connector (2) OT terminal

Figure 2-15 shows the exterior of the power cable between a high-voltage DC surge protectionbox and the external power supply when a high-voltage DC surge protection box is configured.The cross-sectional area of the power cable between a DC surge protection box and the externalpower supply is 4 mm2 (0.01 in.2).

Figure 2-15 Exterior of the power cable between a DC surge protection box and the externalpower supply

(1) OT terminal (2) Bare wire

Pin Assignment for the Wires of a High-Voltage DC Input Power Cable

Table 2-8 describes the pin assignment for the wires of the power cable between an AC/DCpower module and the external power supply.



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Table 2-8 Pin assignment for the wires of the power cable between an AC/DC power moduleand the external power supply (no high-voltage DC surge protection box is configured)



Color Description

X1.L(+) Bare wire Brown +

X1.N(-) Blue -

Table 2-9 describes the pin assignment for the wires of the power cable between an AC/DCpower module and a high-voltage DC surge protection box.

Table 2-9 Pin assignment for the wires of the power cable for the AC/DC power module (high-voltage DC surge protection box is configured)


The Other End (onthe AC SurgeProtection BoxSide)

Color Description

X1.L(+) X2 Brown +

X1.N(-) X3 Blue -

Table 2-10 describes the pin assignment for the wires of the power cable between a high-voltageDC surge protection box and the external power supply.

Table 2-10 Pin assignment for the wires of the power cable between a high-voltage DC surgeprotection box and the external power supply

One End (on theDC SurgeProtection BoxSide)


Color Description

X1 Bare wire Brown +

X2 Bare wire Blue -

NOTE

The colors and structures of cables delivered by Huawei vary according to countries and areas. If cablesare purchased at local markets, the cables must comply with the local rules and regulations.

2.4.5 Alarm CableThe alarm cable for the AC/DC power module provides power-off alarm signals for the RRU.



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ExteriorThe alarm cable for the AC/DC power module has a waterproof DB9 male connector at one endand a waterproof DB15 male connector at the other end, as shown in Figure 2-16.

Figure 2-16 Exterior of the alarm cable for the AC/DC power module

(1) Waterproof DB9 male connector (2) Waterproof DB15 male connector

Pin AssignmentTable 2-11 describes the pin assignment for the wires of the alarm cable for AC/DC powermodule.

Table 2-11 Pin assignment for wires of the alarm cable for the AC/DC power module

AlarmPort

Pin of theDB9Connector

Color WireType

Pin of theDB15Connector

Description

Drycontact

X1.4 Blue Twistedpair

X2.7 AC power-off alarm(GND)

X1.7 White andblue

X2.6 AC power-off alarm

RS485 X1.3 Brown Twistedpair

X2.14 PSU485_TX+

X1.5 White andbrown

X2.13 PSU485_TX-

X1.6 White andgreen

Twistedpair

X2.10 PSU485_RX-

X1.8 Green X2.11 PSU485_RX+

2.4.6 External Alarm CableThe external alarm cable for the AC/DC power module introduces the alarm signal from theexternal device, enabling the base station to monitor the running status of the external device.



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Exterior

The external alarm cable for the AC/DC power module has a DB15 connector at one end andbare wires at the other end, as shown in Figure 2-17.

Figure 2-17 External alarm cable for the AC/DC power module

(1) Plastic shell of the type D waterproof connector (2) DB15 waterproof connector

Pin Assignment

Table 2-12 describes the pin assignment for the wires of an external alarm cable.

Table 2-12 Pin assignment for wires of the external alarm cable for the AC/DC power module

X1 X2 Color Description Port for X2

X1.1 X2.1 Blue and white Twisted pair SWITCH_H1

X1.6 X2.2 Blue GND

X1.2 X2.3 Orange and white Twisted pair SWITCH_H2

X1.7 X2.4 Orange GND

X1.3 X2.5 Green and white Twisted pair SWITCH_H3

X1.8 X2.6 Green GND

X1.4 X2.7 Brown and white Twisted pair SWITCH_H4

X1.9 X2.8 Brown GND

X1.11 X2.9 Blue and red Twisted pair PSU485_TX-

X1.12 X2.10 Blue PSU485_TX+

X1.13 X2.11 Orange and red Twisted pair PSU485_RX-

X1.14 X2.12 Orange PSU485_RX+



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2.5 Technical SpecificationsThis section describes the technical specifications of the AC/DC power module.

Table 2-13 describes the technical specifications of the AC/DC power module.

Table 2-13 Technical specifications of the AC/DC power module

Item Description

Dimensions 390 mm x 208 mm x 75 mm (15.35 in. x 8.19in. x 2.95 in.)

Weight 4.5 kg (9.92 lb)

Input power AC input: 220 V or 110 V; voltage range: 85V to 290 VDC input voltage range: 180 V to 400 V

Output power 800 W

Operating temperature -40C to +50C (-40F to +122F, withoutwind or solar radiation)



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3 Installing an AC/DC Power Module and anRRU

About This Chapter

This chapter describes the procedure for installing an AC/DC power module and an RRU.

3.1 Installing an AC/DC Power Module onto an RRUThis section describes the procedure for installing an AC/DC power module onto a DC RRU.


3.3 Installing Cables for an AC/DC Power ModuleThis section describes the procedure for installing cables for an AC/DC power module.

3.4 Installing a Surge Protection BoxThis chapter describes the dimensions, installation clearance requirements, and installationoptions of an AC surge protection box as well as the procedure for installing the surge protectionbox. When the AC/DC power module is installed outdoors, an AC surge protection box(SPD60D) or a high-voltage DC surge protection box (SPM60M) can be configured.

AC/DC Power ModuleUser Guide 3 Installing an AC/DC Power Module and an RRU


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3.1 Installing an AC/DC Power Module onto an RRUThis section describes the procedure for installing an AC/DC power module onto a DC RRU.

Contextl The RRU and attachment plate in the figure are only examples. The actual RRU and

attachment plate may vary according to the situation.l An AC/DC power module and a DC RRU constitute an AC RRU.

CAUTIONDo not install an AC/DC power module on any side of a DC RRU, as shown in Figure 3-1.

Figure 3-1 No side-installation of the AC/DC power module

Procedurel With the original attachment plate on the rear of the RRU

1. Use an inner hexagon torque screwdriver to remove the original attachment plate fromthe DC RRU, and install the attachment plate for the AC/DC power module onto therear of the RRU. Use a torque screwdriver to tighten the stainless steel screws on theattachment plate with a torque of 5 Nm (44.25 lbfin.), as shown in Figure 3-2.



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Figure 3-2 Installing the attachment plate for the AC/DC power module

2. Install the AC/DC power module onto its attachment plate, and use a torquescrewdriver to tighten the stainless steel screws on the attachment plate with a torqueof 5 Nm (44.25 lbfin.). Install the RRU attachment plate onto the AC/DC powermodule, and use a torque screwdriver to tighten the stainless steel screws on theattachment plate with a torque of 5 Nm (44.25 lbfin.), as shown in Figure 3-3.

Figure 3-3 Installing the AC/DC power module and the RRU attachment plate

l With the original attachment plate on the side of the RRU1. Install the attachment plate for the AC/DC power module onto the rear of the RRU,

and use a torque screwdriver to tighten the stainless steel screws on the attachmentplate with a torque of 5 Nm (44.25 lbfin.), as shown in Figure 3-4.



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Figure 3-4 Installing the attachment plate for the AC/DC power module

2. Install the AC/DC power module onto its attachment plate, and use a torquescrewdriver to tighten the stainless steel screws on the attachment plate with a torqueof 5 Nm (44.25 lbfin.). Remove the original attachment plate from the rear of theRRU, and install it onto the AC/DC power module. Use a torque screwdriver to tightenthe stainless steel screws on the attachment plate with a torque of 5 Nm (44.25 lbfin.),as shown in Figure 3-5.

Figure 3-5 Installing the AC/DC power module and the RRU attachment plate

----End




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ContextThe AC RRU consists of the AC/DC power module and the DC RRU. It can be installed on apole, U-steel, angle steel, or a wall. For details about the installation of the RRU and cables, seethe RRU Installation Guide.

CAUTIONl Only one RRU can be installed in standard mode in these scenarios.l When a single RRU is installed on a wall, the wall has a capacity of bearing at least four

times the weight of the AC RRU.

3.3 Installing Cables for an AC/DC Power ModuleThis section describes the procedure for installing cables for an AC/DC power module.

PrerequisitesPrepare a 3-pin round connector used for connecting one end of the input power cable to theAC/DC power module. For details, see 5.3 Preparing a 3-Pin Round Connector Used forConnecting One End of the AC Input Power Cable to an AC/DC Power Module or 5.4Preparing a 3-Pin Round Connector Used for Connecting One End of the DC Input PowerCable to an AC/DC Power Module.

Contextl The RRU in the figure is only an example. The actual RRU may vary according to the

situation.l The equipotential cable, alarm cable, and output power cable are already connected to the

AC/DC power module before delivery.

Procedure

Step 1 Install the equipotential cable between the AC/DC power module and the DC RRU.

Connect the OT terminals of the equipotential cable to the RRU ground terminals, as shown inFigure 3-6.



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Figure 3-6 Installing the equipotential cable for the AC/DC power module

Step 2 Install output power cables.1. Add a tool-less female connector (pressfit type) to one end of the output power cable. For

details, see the RRU Installation Guide.

2. Connect the tool-less female connector (pressfit type) at one end of the output power cableto the power supply socket on the RRU, as shown in Figure 3-7.

Figure 3-7 Installing output power cables for the AC/DC power module

Step 3 Install alarm cables for the AC/DC power module.



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Connect the waterproof DB15 male connector at the other end of the alarm cable for the AC/DC power module to the RRU alarm port, as shown in Figure 3-8 and Figure 3-9.

Figure 3-8 Installing alarm cables for the AC/DC power module (alarm port in RRU cablingcavity)



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Figure 3-9 Installing alarm cables for the AC/DC power module (alarm port at RRU bottom)

Step 4 Install external alarm cables for the AC/DC power module.

Connect the DB15 connector at one end of the external alarm cable to the EXT_ALM_A porton the AC/DC power module, and connect the other end of the external alarm cable to the externalalarm device, as shown in Figure 3-10.



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Figure 3-10 Installing external alarm cables for the AC/DC power module

Step 5 Install input power cables.l No AC surge protection box is configured.

Connect one end of the input power cable to the PWR IN port on the AC/DC power module,and connect the other end of the input power cable to the external power device, as shownin Figure 3-11.

Figure 3-11 Connection between the AC/DC power module and the external power device

l An AC surge protection box is configured.

Connect one end of the input power cable to the PWR IN port on the AC/DC power module,and connect the other end to the surge protection box, as shown in Figure 3-12.



26

Figure 3-12 Connection between the AC/DC power module and the surge protection box

(1) Power cable between an AC surgeprotection box and the external power supply

(2) Power cable between the AC/DC powermodule and the AC surge protection box

----End

3.4 Installing a Surge Protection BoxThis chapter describes the dimensions, installation clearance requirements, and installationoptions of an AC surge protection box as well as the procedure for installing the surge protectionbox. When the AC/DC power module is installed outdoors, an AC surge protection box(SPD60D) or a high-voltage DC surge protection box (SPM60M) can be configured.

3.4.1 Dimensions and Installation Clearance Requirements of aSurge Protection Box

This section describes dimensions and installation clearance requirements of a surge protectionbox. The installation clearance requirements of an AC surge protection box and a DC surgeprotection box are the same. This section uses an AC surge protection box (SPD60D) as anexample.

Figure 3-13 shows the dimensions of a surge protection box.



27

Figure 3-13 Dimensions of a surge protection box

NOTE

A DC surge protection box is 315 mm (12.40 in.) high, which is 10 mm (0.39 in.) higher than an AC surgeprotection box.

Figure 3-14 shows the recommended installation clearances for a surge protection box.

Figure 3-14 Recommended installation clearances for a surge protection box

Figure 3-15 shows the minimum installation clearance for a surge protection box.



28

Figure 3-15 Minimum installation clearance for a surge protection box

3.4.2 Installation OptionsThis section describes the installation options of a surge protection box. The installation optionsof an AC surge protection box and that of a DC surge protection box are the same. Both of themcan be installed on a pole or a wall. This uses an AC surge protection box (SPD60D) as anexample.

Figure 3-16 shows the surge protection box installed on a pole.

Figure 3-16 Installing a surge protection box on a pole

Figure 3-17 shows the surge protection box installed on a wall.



29

Figure 3-17 Installing a surge protection box on a wall

3.4.3 Installing a Surge Protection BoxThis section describes the procedure for installing a surge protection box. The procedure forinstalling an AC surge protection box and the procedure for installing a DC surge protection boxare the same. This section uses an AC surge protection box (SPD60D) as an example.

Procedurel Install a surge protection box on a pole, as shown in Figure 3-18.

Figure 3-18 Installing a surge protection box on a pole



30

1. Loosen the hoop iron.2. Route the hoop iron through the gap between the backplane and the AC surge

protection box.3. Install the AC surge protection box and hoop iron onto the pole, and tighten the hoop

iron to 4.5 Nm (39.83 lbfin.).

NOTE

If the diameter of the pole is smaller than the hoop iron, cut off the extra part of the hoop iron.

l Install a surge protection box onto a wall.1. Place the backplane of the surge protection box against the wall, use a level to ensure

that the backplane is placed horizontally, and then use a marker to mark anchor points,as shown in Figure 3-19.

Figure 3-19 Marking anchor points

2. Use a hammer drill with a 14 bit to drill holes at the anchor points, and install theexpansion bolts, as shown in Figure 3-20.

NOTEAfter removing the expansion bolts from the wall, dispose of the plastic tubes.



31

Figure 3-20 Installing an expansion bolt

(1) M10x65 bolt (2) Spring washer 10 (3) Plastic tube (4) Flat washer 10 (5) Expansion tube

3. Align holes on the surge protection box with those on the wall, and then tighten theexpansion bolts with a torque of 30 Nm (265.52 lbfin.), as shown in Figure 3-21.

Figure 3-21 Installing a surge protection box

----End



32

3.4.4 Installing Cables for an AC Surge Protection BoxThis section describes the procedure for installing cables for an AC surge protection box. Inspite of different inner structures and cable connections, the procedures for installing cables foran AC surge protection box and a DC surge protection box are the same.

PrerequisitesPrepare OT terminals for connecting one end of a power cable to an AC surge protection box.For details, see 5.1 Preparing OT Terminals for Connecting One End of the Power Cableto the AC Surge Protection Box.

Procedure

Step 1 Install the equipotential cable between the RRU and the AC surge protection box and the PGNDcable for the AC surge protection box, as shown in Figure 3-22.

Figure 3-22 Installing the equipotential cable and the PGND cable

(1) PGND cable (2) Equipotential cable

Step 2 Use an M5 Phillips screwdriver to loosen the screws on the surge protection box and open thecover plate. Then, remove the thread-lock sealing nut from the PG connector of the surgeprotection box, and discard waterproof blocks. Figure 3-23 shows how to open the cover plateof the AC surge protection box.



33

Figure 3-23 Opening the cover plate of an AC surge protection box

(1) PG connector (2) Thread-lock sealing nut of the PG connector (3) Waterproof block

NOTE

Do not reuse the removed thread-lock sealing nut of the PG connector.

Step 3 Glide the thread-lock sealing nut and then glide the PG connector over the power cable.

Step 4 Install the power cable for the AC surge protection box. For details, see Figure 3-24. Connectthe power cable between the AC/DC power module and the surge protection box to the PGconnector on the left, and connect the power cable between the surge protection box and theexternal power device to the PG connector on the right.



34

Figure 3-24 Cable connections of an AC surge protection box

(1) Power cable between the AC/DCpower module and the surge protectionbox

(2) Power cable between the surgeprotection box and the external powerdevice

(3) Clip (4) Insulation layer

1. Route the power cable between the surge protection box and the external power device

through the PG connector labeled IN. Connect the OT terminals for the blue, brown, andgreen and yellow wires to the Lin, Nin, and GND ports on the surge protection box,respectively.

2. Route the power cable between the AC/DC power module and the surge protection boxthrough the PG connector labeled OUT. Connect the OT terminals for the blue, brown, andgreen and yellow wires to the Nout, Lout, and GND ports on the surge protection box,respectively.

3. Tighten the thread-lock sealing nut of the PG connector, and then use a torque wrench totighten the PG connector to ensure proper waterproofing.l Tighten the PG connector of the power cable between the AC/DC power module and

the surge protection box to 1.2 Nm (10.62 lbfin.).l Tighten the PG connector of the power cable between the surge protector and the

external power device to 1.5 Nm (13.28 lbfin.).

Step 5 Use a clip to secure the power cables.NOTE

Use a clip to secure the insulation layer of the power cable.

Step 6 Close the cover plate of the surge protection box and use an M5 Phillips screwdriver to tightenthe screws to 2.8 Nm (24.78 lbfin.), as shown in Figure 3-25.



35

Figure 3-25 Closing the cover plate of the surge protection box

Step 7 Wrap the waterproof tape and then the PVC insulation tape around both ends of each powercable and around the connectors between corrugated pipes. Use two cable ties to bind the PVCinsulation tape at the position 3 mm (0.12 in.) to 5 mm (0.20 in.) away from both ends, as shownin Figure 3-26.

NOTE

l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice itsoriginal length.

l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape.

l Ensure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press thetape tightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will notfall off.

l Ensure that the adhesive surface of the tape overlaps the lower layer.

l Cutting the cable ties at the position of 3 mm (0.12 in.) to 5 mm (0.20 in.) far from the head.



36

Figure 3-26 Fixing the power cables

(1) Adhesive (2) Corrugated pipe (3) Connector between corrugated pipes

Step 8 Use cable ties to bind the cables at equal spacing of 300 mm (11.81 in.) and verify that thebending radius of the corrugated pipe is equal to or more than 60 mm (2.36 in.).

----End

3.4.5 Installing Cables for a DC Surge Protection BoxThis section describes the procedure for installing cables for a DC surge protection box.

PrerequisitesPrepare OT terminals for connecting one end of a power cable to a DC surge protection box.For details, see 5.2 Preparing OT Terminals for Connecting One End of the Power Cableto the DC Surge Protection Box.

Procedure

Step 1 Install the equipotential cable between the RRU and the DC surge protection box and the PGNDcable for the DC surge protection box, as shown in Figure 3-27.



37

Figure 3-27 Installing the equipotential cable and the PGND cable

(1) PGND cable (2) Equipotential cable

Step 2 Use an M5 Phillips screwdriver to loosen the screws on the surge protection box and open thecover plate. Then, remove the thread-lock sealing nut from the PG connector of the surgeprotection box, and discard waterproof blocks. Open the cover plate of the DC surge protectionbox, as shown in Figure 3-28.

Figure 3-28 Opening the cover plate of a DC surge protection box

(1) PG connector (2) Thread-lock sealing nut of the PG connector (3) Waterproof block

NOTE

Do not reuse the removed thread-lock sealing nut of the PG connector.



38

Step 3 Glide the thread-lock sealing nut and then glide the PG connector over the power cable.

Step 4 Install the power cable for the DC surge protection box. For details, see Figure 3-29. Connectthe power cable between the AC/DC power module and the surge protection box to the PGconnector on the left, and connect the power cable between the surge protection box and theexternal power device to the PG connector on the right.

Figure 3-29 Cable connections of a DC surge protection box

(1) Power cable between the AC/DC powermodule and the surge protection box

(2) Power cable between the surge protection boxand the external power device

(3) Clip

(4) Insulation layer (5) Ground terminal

1. Route the power cable between the surge protection box and the external power devicethrough the PG connector on the surge protection box. Connect the OT terminals of thebrown and blue wires to the + and - ports in the surge protection box.

2. Route the power cable between the AC/DC power module and the surge protection boxthrough the PG connector on the surge protection box. Connect the OT terminals of thebrown and blue wires to the + and - ports in the surge protection box.

3. Tighten the thread-lock sealing nut of the PG connector, and then use a torque wrench totighten the PG connector to ensure proper waterproofing.

l Tighten the PG connector of the power cable between the AC/DC power module andthe surge protection box to 1.2 Nm (10.62 lbfin.).

l Tighten the PG connector of the power cable between the surge protector and theexternal power device to 1.5 Nm (13.28 lbfin.).

NOTE

If the power cables for the DC surge protection box contain PE wires, connect two PE wires to the groundterminals in the surge protection box. The power cable diagram on the label in the surge protection boxshows the length of the PE wires.

Step 5 Use a clip to secure the power cables.



39

NOTE

Use a clip to secure the insulation layer of the power cable. The insulation layer rising from the clip mustnot be longer than 5.0 mm (0.20 in.) to avoid a too long bending radius of core wires.

Step 6 Close the cover plate of the surge protection box and use an M5 Phillips screwdriver to tightenthe screws to 2.8 Nm (24.78 lbfin.), as shown in Figure 3-30.

Figure 3-30 Closing the cover plate of the surge protection box

Step 7 Wrap the waterproof tape and then the PVC insulation tape around both ends of each powercable and around the connectors between corrugated pipes. Use two cable ties to bind the PVCinsulation tape at the position 3 mm (0.12 in.) to 5 mm (0.20 in.) away from both ends, as shownin Figure 3-31.

NOTE

l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice itsoriginal length.

l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape.

l Ensure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press thetape tightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will notfall off.

l Ensure that the adhesive surface of the tape overlaps the lower layer.

l Cutting the cable ties at the position of 3 mm (0.12 in.) to 5 mm (0.20 in.) far from the head.



40

Figure 3-31 Fixing the power cables

(1) Adhesive (2) Corrugated pipe (3) Connector between corrugated pipes

Step 8 Use cable ties to bind the cables at equal spacing of 300 mm (11.81 in.) and verify that thebending radius of the corrugated pipe is equal to or more than 60 mm (2.36 in.).

----End



41

4 Replacing an AC/DC Power Module and anRRU

An AC/DC power module and a DC RRU constitute an AC RRU. The AC RRU, BBU, and otherdevices form a distributed base station. Replacing an AC RRU interrupts all the services carriedby the base station and generates alarms.

Prerequisitesl The test UE communicates with the base station properly.

l It has been confirmed whether to replace the DC RRU only or to replace both the AC/DCpower module and DC RRU. The procedure for confirming this is as follows:

If it can be confirmed remotely that the DC RRU is faulty, you only need to replace theDC RRU.

If it cannot be confirmed remotely whether the DC RRU is faulty, you need to preparea new AC/DC power module and a new DC RRU, and then do as follows onsite:

If the RUN indicator on the AC/DC power module is steady on, the AC/DC powermodule works properly and you only need to replace the DC RRU.

If the RUN indicator on the AC/DC power module is steady off, you need to replaceboth the AC/DC power module and the DC RRU.

NOTE

l For details about how to locate the faults, see the 3900 Series Multi-Mode Base Station AlarmReference.

l Some base stations must be maintained after they are powered off. In this case, you need to poweroff the base station, and then replace both the AC/DC power module and the DC RRU onsite.

l The following tools and materials are available: ESD gloves, M4 Phillips screwdrivers, M6Phillips screwdrivers, waterproof tape, and insulation tape.

l The quantity of faulty AC/DC power modules and DC RRUs is confirmed, and newmodules are ready.

Contextl If both the AC/DC power module and the DC RRU need to be replaced, you need to remove

them together. The procedures for removing the AC RRU and the RRU are the same. Fordetails, see the RRU Hardware Maintenance Guide.

AC/DC Power ModuleUser Guide 4 Replacing an AC/DC Power Module and an RRU


42

l If only the DC RRU needs to be replaced, you need to remove the AC/DC power moduleand the DC RRU together, and then remove the DC RRU from the AC/DC power module.This section only describes the procedure for removing the DC RRU from the AC/DCpower module.

Procedure

Step 1 Remove the AC/DC power module and the DC RRU together. For details, see the RRUHardware Maintenance Guide.

Step 2 Record all the cable connections between the DC RRU and the AC/DC power module.

Step 3 Remove all the cables between the DC RRU and the AC/DC power module.

Step 4 Remove the DC RRU, as shown in Figure 4-1.

Figure 4-1 Removing the DC RRU

1. Use a torque screwdriver to remove the stainless steel screws on the RRU attachment plate,and then remove the RRU attachment plate.

2. Use a torque screwdriver to remove the stainless steel screws on the AC/DC power module,and then remove the AC/DC power module.

3. Use a torque screwdriver to remove the stainless steel screws on the attachment plate forthe AC/DC power module, and then remove the attachment plate for the AC/DC powermodule.

Step 5 Install a new DC RRU. For details, see 3.1 Installing an AC/DC Power Module onto anRRU.

NOTE

For details about the procedure for installing the AC RRU and performing a check and subsequentoperations, see the RRU Hardware Maintenance Guide.

----End

AC/DC Power ModuleUser Guide 4 Replacing an AC/DC Power Module and an RRU


43

5 AppendixAbout This Chapter

5.1 Preparing OT Terminals for Connecting One End of the Power Cable to the AC SurgeProtection BoxThis section describes the procedure for preparing OT terminals for connecting one end of thepower cable to an AC surge protection box.

5.2 Preparing OT Terminals for Connecting One End of the Power Cable to the DC SurgeProtection BoxThis section describes the procedure for preparing OT terminals for connecting one end of thepower cable to a DC surge protection box.

5.3 Preparing a 3-Pin Round Connector Used for Connecting One End of the AC Input PowerCable to an AC/DC Power ModuleThis section describes the procedure for preparing a 3-pin round connector used for connectingone end of an AC input power cable to an AC/DC power module.

5.4 Preparing a 3-Pin Round Connector Used for Connecting One End of the DC Input PowerCable to an AC/DC Power ModuleThis section describes the procedure for preparing a 3-pin round connector used for connectingone end of a DC input power cable to an AC/DC power module.

AC/DC Power ModuleUser Guide 5 Appendix


44

5.1 Preparing OT Terminals for Connecting One End of thePower Cable to the AC Surge Protection Box

This section describes the procedure for preparing OT terminals for connecting one end of thepower cable to an AC surge protection box.

ContextFigure 5-1 shows the power cable diagram on the label in an AC surge protection box.

Figure 5-1 Power cable diagram on the label in an AC surge protection box

(1) Power cable diagram on the label in an AC surge protection box

Procedure

Step 1 Cut each cable to a length suitable for the actual cable route.

Step 2 If the power cable is longer than or equal to 5 m (16.4 ft), cut the corrugated pipe into lengthsof 5 m (16.4 ft); if the cable is shorter than 5 m (16.4 ft), cut the corrugated pipe based on theactual length of the power cable.

NOTE

The following procedure uses the power cable longer than or equal to 5 m (16.4 ft) as an example.

Step 3 Route the power cable through corrugated pipes, and add a connector between two corrugatedpipes, as shown in Figure 5-2.



45

Figure 5-2 Routing the power cable through corrugated pipes

Step 4 Connect the corrugated pipes, as shown in Figure 5-3.

Figure 5-3 Connecting corrugated pipes

Step 5 Determine the length of the cable for different operations based on the power cable diagram onthe label in the surge protection box, as shown in Figure 5-4.

Figure 5-4 Determining the length of the power cable for the AC surge protection box



46

Step 6 Strip a specified length of the sheath and shield layer off the power cable for the surge protectionbox, as shown in Figure 5-5.

Figure 5-5 Stripping the sheath and shield layer off the power cable for the AC surge protectionbox

Step 7 Strip the sheath off each core wire of the power cable for the AC surge protection box, as shownin Figure 5-6.

Figure 5-6 Stripping the sheath off the core wire of the power cable for the AC surge protectionbox

Step 8 Add OT terminals to core wires for the AC surge protection box, as shown in Figure 5-7.

Figure 5-7 Adding OT terminals to core wires for the AC surge protection box

----End

5.2 Preparing OT Terminals for Connecting One End of thePower Cable to the DC Surge Protection Box

This section describes the procedure for preparing OT terminals for connecting one end of thepower cable to a DC surge protection box.

Context

Figure 5-8 shows the power cable diagram on the label in a DC surge protection box.



47

Figure 5-8 Power cable diagram on the label in a DC surge protection box

(1) Power cable diagram on the label in a DC surge protection box

Procedure

Step 1 Cut each cable to a length suitable for the actual cable route.

Step 2 If the power cable is longer than or equal to 5 m (16.4 ft), cut the corrugated pipe into lengthsof 5 m (16.4 ft); if the cable is shorter than 5 m (16.4 ft), cut the corrugated pipe based on theactual length of the power cable.

NOTE

The following procedure uses the power cable longer than or equal to 5 m (16.4 ft) as an example.

Step 3 Route the power cable through corrugated pipes, and add a connector between two corrugatedpipes, as shown in Figure 5-9.

Figure 5-9 Routing the power cable through corrugated pipes

Step 4 Connect the corrugated pipes, as shown in Figure 5-10.



48

Figure 5-10 Connecting corrugated pipes

Step 5 Determine the length of the cable for different operations based on the power cable diagram onthe label in the surge protection box, as shown in Figure 5-11.

Figure 5-11 Determining the length of the power cable for the DC surge protection box

Step 6 Strip a specified length of the sheath and shield layer off the power cable for the surge protectionbox, as shown in Figure 5-12.

Figure 5-12 Stripping the sheath and shield layer off the power cable for the DC surge protectionbox

Step 7 Strip the sheath off each core wire of the power cable for the DC surge protection box, as shownin Figure 5-13.

Figure 5-13 Stripping the sheath off the core wire of the power cable for the DC surge protectionbox



49

Step 8 Add OT terminals to core wires for the DC surge protection box, as shown in Figure 5-14.

Figure 5-14 Adding OT terminals to core wires for the DC Surge protection box

----End

5.3 Preparing a 3-Pin Round Connector Used for ConnectingOne End of the AC Input Power Cable to an AC/DC PowerModule

This section describes the procedure for preparing a 3-pin round connector used for connectingone end of an AC input power cable to an AC/DC power module.

ContextFigure 5-15 shows the components of a 3-pin round connector.

Figure 5-15 Components of a 3-pin round connector

(1) Protective cover (2) Gasket (3) Nut

Procedure

Step 1 Maintain sufficient slack in the power cable, install plastic cable ties, route the nut and gasketthrough the power cable, and partially tighten them, as shown in Figure 5-16.



50

Figure 5-16 Routing the nut and gasket through the power cable

(1) Power Cable (2) Plastic cable tie

Step 2 Strip the sheaths off the power cable and each core wire, as shown in Figure 5-17.NOTE

Cut the padding using a pair of diagonal pliers.

CAUTIONl Gently strip the insulation sheath to avoid damage to the conductor metal.l Ensure that the edge of the wires is not split.

Figure 5-17 Stripping the sheath off the cable

Step 3 Connect the core wire labeled N(-) to the N(-) port on the connector, the core wire labeled L(+)to the L(+) port on the connector, and the PE wire to the PE port on the connector, and then usea Phillips screwdriver to tighten the three screws, as shown in Figure 5-18.



51

Figure 5-18 Connecting the core wire to the connector and tightening the core wire

Step 4 Pull each core wire slightly to check whether the connections are secure. If the cable slidesoutward or the wire of the cable is exposed outside the hole for the cable, remove the cable, cutthe split wires, and then strip the jacket and install the cable again.

Step 5 Use your hand to screw the gasket and the protective cover until the red line on the gasket cannotbe seen, as shown in Figure 5-19.

Figure 5-19 Tightening the gasket and the protective cover



52

Step 6 Partially tighten the nut and the gasket, and then use a combination wrench with an aperture of28 mm (1.10 in.) to tighten the nut, as shown in Figure 5-20.

Figure 5-20 Tightening the nut and the gasket

Step 7 Use a multimeter to test the reliability of the components of a power cable.

CAUTIONl No short circuit between connector plugs is allowed.l No short circuit between the metal shell and the connector plug is allowed.l The shield layer and the metal shell must be connected.l The core wire and the corresponding connector plug must be connected.

Step 8 If the device is installed outdoors, the connector must be wrapped with three layers of insulationtape, as shown in Figure 5-21.

CAUTIONDo not wrap the connector with more than three layers of insulation tape.



53

Figure 5-21 Wrapping three layers of PVC insulation tape

----End

5.4 Preparing a 3-Pin Round Connector Used for ConnectingOne End of the DC Input Power Cable to an AC/DC PowerModule

This section describes the procedure for preparing a 3-pin round connector used for connectingone end of a DC input power cable to an AC/DC power module.

ContextFigure 5-22 shows the components of a 3-pin round connector.

Figure 5-22 Components of a 3-pin round connector

(1) Protective cover (2) Gasket (3) Nut

Procedure

Step 1 Maintain sufficient slack in the power cable, install plastic cable ties, route the nut and gasketthrough the power cable, and partially tighten them, as shown in Figure 5-23.



54

Figure 5-23 Routing the nut and gasket through the power cable

(1) Power Cable (2) Plastic cable tie

Step 2 Strip the sheaths off the power cable and each core wire, as shown in Figure 5-24.NOTE

Cut the padding using a pair of diagonal pliers.

CAUTIONl Gently strip the insulation sheath to avoid damage to the conductor metal.l Ensure that the edge of the wires is not split.

Figure 5-24 Stripping the sheath off the cable

Step 3 Connect the core wire labeled N(-) to the N(-) port on the connector, connect the core wirelabeled L(+) to the L(+) port on the connector, and then use a Phillips screwdriver to tighten thetwo screws on the side, as shown in Figure 5-25.



55

Figure 5-25 Connecting the core wire to the connector and tightening the core wire

Step 4 Pull each core wire slightly to check whether the connections are secure. If the cable slidesoutward or the wire of the cable is exposed outside the hole for the cable, remove the cable, cutthe split wires, and then strip the jacket and install the cable again.

Step 5 Use your hand to screw the gasket and the protective cover until the red line on the gasket cannotbe seen, as shown in Figure 5-26.

Figure 5-26 Tightening the gasket and the protective cover



56

Step 6 Partially tighten the nut and the gasket, and then use a combination wrench with an aperture of28 mm (1.10 in.) to tighten the nut, as shown in Figure 5-27.

Figure 5-27 Tightening the nut and the gasket

Step 7 Use a multimeter to test the reliability of the components of a power cable.

CAUTIONl No short circuit between connector plugs is allowed.l No short circuit between the metal shell and the connector plug is allowed.l The shield layer and the metal shell must be connected.l The core wire and the corresponding connector plug must be connected.

Step 8 If the device is installed outdoors, the connector must be wrapped with three layers of insulationtape, as shown in Figure 5-28.

CAUTIONDo not wrap the connector with more than three layers of insulation tape.



57

Figure 5-28 Wrapping three layers of PVC insulation tape

----End



58
About This DocumentContents1 Changes in the AC/DC Power Module User Guide2 Overview2.1 Function2.2 Exterior2.3 Ports2.4 Cables2.4.1 Cable List2.4.2 Equipotential Cable2.4.3 Output Power Cable2.4.4 Input Power Cable2.4.5 Alarm Cable2.4.6 External Alarm Cable2.5 Technical Specifications3 Installing an AC/DC Power Module and an RRU3.1 Installing an AC/DC Power Module onto an RRU3.2 Installing the RRU3.3 Installing Cables for an AC/DC Power Module3.4 Installing a Surge Protection Box3.4.1 Dimensions and Installation Clearance Requirements of a Surge Protection Box3.4.2 Installation Options3.4.3 Installing a Surge Protection Box3.4.4 Installing Cables for an AC Surge Protection Box3.4.5 Installing Cables for a DC Surge Protection Box4 Replacing an AC/DC Power Module and an RRU5 Appendix5.1 Preparing OT Terminals for Connecting One End of the Power Cable to the AC Surge Protection Box5.2 Preparing OT Terminals for Connecting One End of the Power Cable to the DC Surge Protection Box5.3 Preparing a 3-Pin Round Connector Used for Connecting One End of the AC Input Power Cable to an AC/DC Power Module5.4 Preparing a 3-Pin Round Connector Used for Connecting One End of the DC Input Power Cable to an AC/DC Power Module

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