Huawei RRU3908 850, RRU3908 1900 Users Guide

RRU3908 V1
V100R003

Installation Guide

Issue: 02
Date: 2010-07-20

HUAWEI TECHNOLOGIES Co., Ltd.

Contents

1. Installation Tools …………………………………………………………………………………………….

2. Installing the DC RRU………………………………………………………………………………………
Installation Modes …………………………………………………………………………………….
Space Requirements …………………… ……………… ………… ……………… …… .. …………
Installation Procedure ………………………………………………………………………………….
Preparing for the installation …………… ……………… ………… ……………… …… …………….
Installing the RRU o n a Metal Pole ……………………… ………………………………………….
Installing the RRU on a U-Steel ………………… ……………… …… ………… ……………… ….
Installing the RRU on an An gle Ste e l ………………… ………… …… ……………… ………… …
Installing the RRU on a Wall …………………………………… ……………… …… ………………
Cable Connections of a Single RRU ………………………………………………………………
Cable Connections of Multiple RRUs ………………………………………………………………
Cable List …………………………………………………………… ……………… …… …………. ..
Installing the RRU Cable s ……………………………………………………………………………
RRU Cable Installation Scenarios ……………………………………………… …………………

3. Installing the AC RRU ………………………………………………………………………………... ……
Space Requirements …………………… ……………… ………… ……………… ….. ………… …
Installation Modes ……………………………………………………………………………………
Installing the Surge Protection Box (for Outdoor Scenarios) ……………………………………
Cable Connections of a Single RRU ……………………………………………………………….
Cable Connections of Multiple RRUs ………………………………………………………………
List of Cables (No Surge Protection Box Con fi gure d) ………… ……………… …… ……………
List of Cables (Surge protection box Configured) ……………… ……………… …… …………...
Installing the RRU Cable s ……………………………………………………………………………
Installation Checklist …………………………………… ………… ……………… …… ………… ….

4. Powering On the RRU ………………………………………………………………………………………

5. Appendix ……………………………………………………………………………………………………
Binding the RRU and Installation Components …………………………………………………..
Making OT Terminals by Using a Cable Peeler (Recommended) ……………………………...
Making OT Terminals at the Input End of the Power Cable by Using a Knife …………………
Waterproofing Outdoor Cables ……………………………... ………………………………………
Installing the Optical Module …………………………………………………………………………
Installing the Corrugated Pipes of AC Power Cable ……………………………………………..
Pin Assignment for the Wires of the RRU Alarm Cabl e(DC) ……………………………………

6. Changes History ……………………………………………………………..………..…………..……….

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Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved.

Installation Tools

Hammer drill (with bit 14)

Heat gun

Rubber hammer

ESD gloves

Phillips screwdriver

(M3~M6)

Crimping pliers

Vacuum cleaner

Flat-head screwdriver

(M3~M6)

Wire stripper

Guarded blade utility knife

Level

Multimeter

Wire cutter

5mm

M3~M6

Torque screwdriver

Marking pen

(with the diameter of no more

than 10 mm)

Adjustable wrench

(with the diameter of at least 32 mm)

Torque wrench

Combination wrench

(21mm~21mm) for pole installation
(17mm~17mm) for wall installation

Measuring tape

2

Installing the DC RRU

Installation Modes

a

On a metal pole

On an angle steelOn a U-steel

On a wall

The following figure describes the specificati ons for the metal pole, angle steel, a nd U-steel where the RRU is
installed.

60 mm to 114 mm

(The recommended value is 80 mm.)

80mm

～

63mm

Metal pole

63 mm to 80 mm

63 mm to 80 mm

50 mm to 100 mm

Angle steel U-steel

RRU

30 mm to 50 mm

The angle between
the vertical and the
angle steel or U-

Angle steel
or U-steel

≤10°

steel or angle steel
where the RRU is
installed must be
less than or equal
to 10 degree.

The brackets cannot be
combined when the RRUs
are installed on the wall.

WARNING

z A maximum of two RRUs can be installed on a metal pole with the diameter of 60 mm to 76 mm, and the
RRUs must be installed on the b a ck.

z Only one RRU can be installed on a U-steel or an angle steel at the back.
z When installed on a tower, only one RRU can be installed in standard mode or reverse mode, and two RRUs

cannot be installed in back-to-back mode, or the brackets cannot be combined when the RRUs are installed on
the tower.

z A single DC RRU can be bound and lifted to a tower. For details, see page 34 "Binding the RRU and
Installation Components."

3

Installing the DC RRU

Dimensions and Installation Clearance

b

RRU Dimensions

380 mm

170 mm

485 mm

Minimum Clearance for a Single RRU

The minimum installation clearance meets the
requirements of the equipment for normal running and
heat dissipation, but does not meet the requirements for
Operation and Maintenance (OM) such as checking the
status of the LEDs and opening the maintenance cavity.
When the installation space is restricted, the minimum
installation clearance can be adopted.

200 mm

Recommended Clearance for a Single RRU

The recommended installation clearance meets the
requirements of the equipment for normal running and OM.
When the installation space is sufficient, the recommended
installation clearance can be adopted.

≥300 mm

≥3

0

0

m

m

m

m

≥

0

0

8

≥500 mm

≥

6

0

0

m

m

Minimum clearance for the RRU installed on
a tower

200 mm

1

0

0

m

0

6

Top view

600 mm

m

m

m

0

100 mm

300 mm

4

0

0

m

m

400 mm

m

m

0

8

2

Auxiliary metal pole

280 mm

Main metal pole

4

0

0

m

m

300 mm

Side viewTop view

400 mm 280 mm

Main metal
pole

Auxiliary
metal pole

4

Installing the DC RRU

Dimensions and Installation Clearance

b

Recommended Horizontal Spacing for
Two RRUs Installed in Parallel

≥300 mm ≥600 mm ≥600 mm 100 mm 400 mm 400 mm

Recommended Vertical Spacing for Two
RRUs Installed in Parallel

≥300 mm

Minimum Horizontal Spacing for Two
RRUs Installed in Parallel

Minimum Vertical Spacing for Two
RRUs Installed in Parallel

200 mm

≥500 mm

≥500 mm

300 mm

300 mm

5

Installing the DC RRU

Installation Procedure

c

Preparing for the Installation

d

Auxiliary bracket

Dual-nut bolt

Main bracket

Main and auxiliary brackets for the RRU

Cover plate

Front Back

Attachment plate

6

Installing the DC RRU

Installing a Single RRU on a Metal Pole

e

1. Install the main bracket.

When installing the
main bracket,
ensure that the
contact piece on
the bracket is fixed.

1200 mm～1600 mm

You may fit one end of the auxiliary bracket on one dual-nut bolt assembly and then the other end on the
other dual-nut bolt assembly during the installation.

2. Use an adjustable wrench to tighten the nut until the fastening torque is 40 N·m. In
this way, the main and auxiliary brackets are secured on the pole.

Fasten the two dual-nut bolt assemblies

40N•m

alternatively. After the brackets are secure,
use a tape to measure the spacing between
the main bracket and the auxiliary bracket at
the two sides and ensure that the spacing is
the same.

3. Install the RRU on the main bracket. When you hear click sound, you can infer that
the RRU is in position.

z The weight-bearing capacity of the RF
ports at the bottom of th e RRU is low. Do
not place the RRU at its bott om.

z During the operation, place the foam
pad or cardboard under the RRU to
prevent any damage to the housing of
the RRU.

7

Installing the DC RRU

Cable List

l

cable between the
RRU and the RCU

Standard AISG female connector

Connected to…Connector TypeCable

Port labeled RET on the RRUWaterproof DB9 connectorAISG multi-wire
Standard AISG male connector of the AISG

extension cable or RCU

cable between the
RRU and the RCU

RRUs

cable

Standard AISG male connectorAISG extended

2W2 connectorRF cable between

2W2 connector

DB15 male connectorDC RRU alarm

Standard AISG female connector of the AISG
multi-wire cable

Standard AISG male connector of the RCUStandard AISG female connector

Port labeled RX_IN/OUT on the upper-level
RRU

Port labeled RX_IN/OUT on the lower-level
RRU

Port labeled EXT_ALM in the RRU cabling
cavity

External alarm devicesEight cord end terminals

cable for
cascading

the CPRI_E port on the upper-level RRUSFP200 male connectorSFP high-speed

the CPRI_W port on the lower-level RRUSFP200 male connector

15

Installing the DC RRU

m

Installing the RRU Cables

1. Opening the Cover Plate of the RRU Cabling Cavity

M4

2. The Cabling Cavity of the RRU

Reference for making

the power cable

Cabling cavity

Cover plate of
the cabling cavity

Cable trough for the

power cable

Cable trough for the

optical cable

Cable trough for the

power cable

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Waterproofing filler

Installing the DC RRU

n

Installing the RRU Cables

3. Cable Connections of RRU

Case 2 Case 1

DC RRU alarm cable
CPRI optical cable
DC RRU power cable
PGND cable
RRU RF jumper

Shielding layer of
the power cable

Waterproofed
alarm cable

Do not remove the dustproof cap from the feeder connectors that are not
in use. In addition, protection measures against damp, dust, and salt mist
must be taken. If the RRU is installed outdoors, you also need to wrap
the joint with waterproof tape, as shown in the following figures.

Waterproof tape

Dustproof
cap

z Press the strap on the exposed shielding layer of the power cable
tightly. Ensure that the lower edge of the exposed shield layer does not
exceed the position shown in the figure.

z The alarm cable is preferably led out of the RRU from the narrower
cable trough in the middle of the cabling cavity. If the cable trough is
used by the CPRI optical cable, the alarm cable is led from the wider
cable trough near the middle one. In this case, the alarm cable must be
wrapped with 10 to 17 layers of waterproof tape so that the diameter of
the cable reaches 10 mm to 12 mm.

z To avoid sharp bending, the optical cable must be pressed by the
strap next to the power cable during the optical cable installation.

z Waterproof fillers should be installed in the unused cable trough.

Insulating tapeInsulating tape

4. Closing the Cover Plate of
the RRU Cabling Cavity.

M4

1.4N•m

z The tape is wrapped spirally upwards, downwards, and then upwards
again in three layers. For every two adjacent tape layers, the tape on the
upper layer overlaps about half the width of the tape on the lower layer.

z For details on how to add the OT terminals to the DC RRU power
cable, see page 36.

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z The screw on the cover plate is tightened until
the fastening torque is 14 kgf•cm.

z The screws on the cover plate are tightened in
the order shown in the preceding figure.

Installing the DC RRU

RRU Cable Installation Scenarios

o

RRU+Wall-Mounted BBU

DC RRU power cable
CPRI optical cable

LOAD0

Shielding layer
of DC RRU
power cable

The DCDU panel must
face right side and the
BBU panel must face
downwards.

z When connecting the DC RRU power cable to the DCDU-03B, you must add an OT t erminal to the
shielding layer. Then, fix the OT terminal to the corresponding PGND terminal of the DCDU-03B. For
details on how to add an OT terminal, see page 37.

z The DC RRU power cable is connected to one of the LOAD0 to LOAD5 terminals of the DCDU-03B.

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Installing the DC RRU

RRU Cable Installation Scenarios

o

RRU+PS4890

DC RRU power cable
CPRI optical cable

LOAD0

Shielding layer
of DC RRU
power cable

z When connecting the DC RRU power cable to the DCDU-03B, you must add an OT t erminal to the
shielding layer. Then, fix the OT terminal to the corresponding PGND terminal of the DCDU-03B. For
details on how to add an OT terminal, see page 37.

z The DC RRU power cable is connected to one of the LOAD0 to LOAD5 terminals of the DCDU-03B.

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