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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10
13
13
14
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18
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34
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36
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1

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

16

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.

17

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.

18

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.

19

Installing the DC RRU

RRU Cable Installation Scenarios

o

220 V AC input (4815 installed in the OMB cabinet).

Grounding the shielding layer
of the power cable:

Metal Shielding layer (25 mm) PGND cable

The DC RRU power cable is
connected to terminals of the
4815 power system for RRU.

–48 V DC input (DCDU-03C installed in the OMB cabinet).

Grounding the shielding layer
of the power cable:

Metal Shielding layer (25 mm) PGND cable

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

DC RRU power cable
CPRI optical cable

20

DC RRU power cable
CPRI optical cable

Installing the DC RRU

Installing Two RRUs Back-To-Back on a Metal Pole

f

1. Install an RRU. For details, see page 6

Installing a Single RRU on a Metal Pole.

3. Reinstall the attachment plate and cover plate on the second RRU by interchanging
their positions.

2. Install the main fixture for another RRU.

4. Install the second RRU on the main bracket.

Ensure that the cabling
cavities of the two RRUs
face the same direction
when installing the RRUs.

M6X16

5N•m

In reverse mode

In standard mode

8

Cabling cavity

Installing the DC RRU

g

Installing the RRU on a U-Steel

U-steel

Plan view

z The procedu re for installing the RRU on a U-steel is the same as that on a metal pole.
z Only one RRU can be installed on a U-steel.

Installing the RRU on an Angle Steel

h

Plan view

Angle steel

z The procedure for inst allin g t he RRU o n an an gl e st e el is the same as th at o n a met al p ol e.
z Only one RRU can be installed on an angle steel.

9

Installing the DC RRU

Installing the RRU on a Wall

i

1. Place the auxiliary fixture on the wall at the installation position and then mark the
anchor points by using a marking pen.

128 mm

Auxiliary bracket

z It is recommended that the auxiliary bracket
be 1,200 mm to 1,600 mm above the ground.

z The RRUs cannot installed on a wall in
centralized mode. Therefore, expansion bolt
assemblies should b e pr epared for each RRU.

126 mm

1200 mm～1600 mm

126 mm

RRU

2. Drill holes at the anchor points and then install the expansion bolt assemblies.

M10x65 bolt
Spring washer 10

Ø14

90°

55 mm to 60 mm

Plastic tube
Flat washer 10
Expansion tube

Do not hammer the bolt entirely into the
wall. Instead, leave 20 mm to 30 mm of
the bolt outside the wall.

20 mm to 30 mm

After the expansion bolt is removed,
dispose of the plastic tube.

When the RRU is installed on a wall, the requirements are as follows:

z For one RRU, the wall has a weight-bearing capacity of 92 kg.
z The fastening torque of the expansion bolt reaches 30 N·m, the expansion bolt works properly, and no

damages such as cracks are on the wall.

10

Installing the DC RRU

Installing the RRU on a Wall

i

3. Fit the auxiliary bracket on the expansion
bolts downward, and then tighten the bolts
by using a combination wrench 17 mm.

M10

30N•m

Arrows are upwards

4. Install the main bracket.

5. Install the RRU.

11

Installing the DC RRU

Installing the RRU on a Wall

i

6. Install multiple RRUs.

Recommended Clearance :

≥760 mm ≥760 mm

Minimum Clearance:

650 mm

≥730 mm≥430 mm

650 mm 530 mm230 mm

≥535 mm ≥535 mm

≥70 mm ≥70 mm

12

Installing the DC RRU

j

Cable Connections of a Single RRU

DC RRU alarm cable
CPRI optical cable
DC RRU power cable
RF cable between RFUs
AISG multi-wire cable between

the RRU and the RCU
RRU RF jumper
Feeder
AISG extended cable between

the RRU and the RCU
PGND cable

External power
supply

Install the PGND cable

Install the RF jumper

(RF cable between RFUs is

optional)

Antenna

Install the DC RRU power cable

RCU

Install the CPRI optical cable

Install the DC RRU alarm

cable(optional)

Install the AISG multi-wire cable

between the RRU and the RCU

(optional)

Install the AISG multi-wire cable

between the RRU and the RCU

(optional)

External alarm
device

When a dual-polarized antenna is shared by two RRUs in the same sector, the two RRUs are connected
through an RF cable between RFUs. The connections of three RRUs in the same sector are not supported.

k

Cable Connections of Multiple RRUs

13

This figure shows only the CPRI optical cable
connections. For details on the connections
of other cables, see the cable connections
for a single RRU.

Installing the DC RRU

Cable List

l

Connected to…Connector TypeCable

Grounding bolt on the RRUOT terminal ( M6 )PGND cable

(16 mm²)

( North American
standard: 2AWG

European standard:
4 mm² )

North American standard:

Nearest grounding barOT terminal ( M8 )

Ports labeled ANT-A and ANT-B on the RRUDIN male connectorRRU RF jumper
Feeder or antennaDIN male connector

Two OT terminals ( M4 )DC RRU power cable

z North American standard:
The OT terminal on the blue wire is connected to the

NEG(-) port on the cabling c avity of th e RRU. The OT
terminal on the black wire is connected to the RTN(+)
port on the cabling cavity of the RRU

z European standard:
The OT terminal on the blue wire is connected to the

NEG(-) port on the cabling c avity of th e RRU. The OT
terminal on the brown wire is connected to the RTN(+)
port on the cabling cavity of the RRU

European standard:

North American standard:

European standard:

DLC connectorCPRI optical cable

DLC connector

External power supplyBare wire

Connect the fiber tails labeled 1A and 1B to the
CPRI_W port on the RRU

Connect the fiber tails labeled 2A and 2B to one of the
CPRI0 to CPRI5 ports on the WBBP or GTMU

14

Installing the DC RRU

RRU Cable Installation Scenarios

o

RRU+TMC

Grounding the shielding layer
of the power cable:

DC RRU power cable
CPRI optical cable

Metal Shielding layer (25 mm) PGND cable

z When connecting the DC RRU power cable to the DCDU-03B, you must add an OT terminal 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.
z Three power cables can be led through each ground clip.

22

Installing the AC RRU

Space Requirements

a

380 mm 250 mm

485 mm

The recommended/minimal clearance for the
AC RRU/clearance for Two Combined RRUs is
the same as that for the DC RRU. For details,
see page 4 and page 5.

b

Installation Modes

b

On a metal pole

On an angle steelOn a U-steel

On a wall

The AC RRU cannot be installed at the side. When it is installed in other modes, the procedure is the same as
that of the DC RRU.
For details, see page 6.

23

Installing the AC RRU

c

Installing the Surge Protection Box (for Outdoor Scenarios)

Installation of the surge protection box.

Dimensions of the surge protection
box.

140 mm

240 mm

305 mm

75 mm

Hoop
iron

Recommended clearance for the surge
protection box.

≥100 mm

≥

100

m

m

≥

5

0

0

m

m

≥

m

m

0

0

5

Minimal clearance for the surge
protection box.

50 mm

50

m

m

3

0

m

m

0

0

3

0

m

m

≥500 mm

300 mm

24

Installing the AC RRU

c

Installing the Surge Protection Box (for Outdoor Scenarios)

1. Install the surge protection box on the metal pole.

As shown in the figure, unfasten the screw on
the loop iron with the torque of 4.8 N•m.

Lead the loop iron through the opening
between the back plate of the surge protection
box and the surge protection box.

Circle the loop iron around the metal pole, and
then tighten the screw on the loop iron.

If the pole has a small diamet er, th er e
is a long extra part of the hoop. It is
recommended that the extra part be cut.

Installing the surge protection
box on the wall

z when installing the surge protection bo x,
you need to dispose of the plastic tube on
the expansion bolt.

z The procedure for installing the surge
protection box on the wall is the same as
that for installing the RRU on the wall. For
details, see page 10.

2. Open the cover of the surge protection box.

25

Installing the AC RRU

c

Installing the Surge Protection Box (for Outdoor Scenarios)

3. Connect the power cable
between the surge protection
box and the RRU.

OUT

IN

Lead the external AC power cable through the PG connector labeled
IN. The L, N, and PE wires of the power cable are connected to the
Lin, Nin, and PE terminals on the surge protection box.

Lead the power cable between the RRU and the surge protection
box through the PG connector labeled OUT. The Lin, Nin, and PE
wires of the power cable are connected to the Lout, Nout, and PE
terminals on the surge protection box.

Tighten the thread-lock sealing nut, and then use a wrench to further
tighten the connector for one or two laps to ensure its waterproofing
capability.

Insulating
layer

PG connector

Thread-lock
sealing nut

OUT

AC IN

z The cable led through the PG connector labeled OUT is the
power cable between the RRU and the surge protection box,
and the cable led through the PG connector labeled IN is the
external AC power cable.

z Install the corrugated pipes for the AC power cables before
installing the AC RRU power cables. For details, see page 39.

4. Close the cover of the surge
protection box.

1.4N•m

z Lead the cable through the removed thread-lock sealing nut
of the PG connector, and then lead the cable through the PG
connector.

z The removed thread-lock sealing nut of the PG connector
cannot be replaced with the thread-lock sealing nuts of other
surge protection boxes.

z Ensure that the case of the cable
pressed by the strap.

insulating layer is tightly

5. Connect the PGND cable.

PGND cable

Equipotential cable

26

Installing the AC RRU

Cable Connections of a Single RRU

d

AC RRU monitoring signal cable
CPRI optical cable
DC RRU power cable
RF cable between RRUs
AISG multi-wire cable between

the RRU and the RCU
RRU RF jumper
Feeder
AISG extended cable between

the RRU and the RCU
PGND cable
AC RRU power cable
Equipotential cable

Antenna

External power
supply

The AC RRU monitoring signal cable, DC RRU power cable, equipotential cable between the power module
and the RRU are installed before delivery.

Sequence of Installing the Cables： PGND cable → RRU RF jumper → AC RRU power cable→ CPRI optical
cable → AISG multi-wire cable between the RRU and the RCU ( optional ) →AISG extended cable between
the RRU and the RCU ( optional )

Cable Connections of Multiple RRUs

e

The cable connections for multiple AC-powered RRUs and multiple DC-powered RRUs are the same. For
details, see page13.

27

Installing the AC RRU

List of Cables (No Surge Protection Box Configured)

f

Connected to…Connector TypeCable

Grounding bolt on the RRUOT terminal (M6)PGND cable

(16 mm²)

RRU RF jumper

AC RRU power
cable
(1.5mm²)

To be made depending on
field requirements

Nearest grounding barOT terminal (M8)

Ports labeled ANT-A and ANT-B on the RRUDIN male connector
Feeder or antennaDIN male connector

Port labeled AC_in on the RRURound connector
External power supply

cable

cable between
the RRU and the
RCU

DLC connectorCPRI optical

DLC connector

Standard AISG female
connector

Connect the fiber tails labeled 1A and 1B to the CPRI_W
port on the RRU

Connect the fiber tails labeled 2A and 2B to one of the
CPRI0 to CPRI5 ports on the WBBP or GTMU

Port labeled RET on the RRUWaterproof DB9 connectorAISG multi-wire

Standard AISG male connector of the AISG extension
cable or RCU

28

Installing the AC RRU

List of Cables (No Surge Protection Box Configured)

f

Connected to…Connector TypeCable

AISG extended
cable between
the RRU and the
RCU

between RRUs

cable for
cascaded RRUs

Standard AISG male
connector

connector

Standard AISG female connector of the AISG multi-wire
cable

Standard AISG male connector of the RCUStandard AISG female

Port labeled RX_IN/OUT on the RRU2W2 connectorRF cable
Port labeled RX_IN/OUT on the RRU2W2 connector

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

g

List of Cables (Surge protection box Configured)

Connected to…Connector TypeCable

Grounding bolt on the surge protection boxOT terminal (M6)PGND cable

(16 mm²)

DLC connectorCPRI optical

cable

DLC connector

RRU RF jumper

Nearest grounding barOT terminal (M8)

Connect the fiber tails labeled 1A and 1B to the CPRI_W
port on the RRU

Connect the fiber tails labeled 2A and 2B to one of the
CPRI0 to CPRI5 ports on the GTMU

Ports labeled ANT-A and ANT-B on the RRUDIN male connector
Feeder or antennaDIN male connector

29

Installing the AC RRU

g

List of Cables (Surge protection box Configured)

Connected to…Connector TypeCable

Port labeled AC IN on the RRURound connectorPower cable
between RRU and
the surge
protection box

(1.5 mm²)

OT terminal

The Lout, Nout, and PE terminals on the surge protection

box

External AC input
power cable

(4 mm²)

AISG extended
cable between the
RRU and the
RCU

RRUs

To be made depending on
field requirements

Standard AISG male
connector

connector

The Lin, Nin, and PE terminals on the surge protection box OT terminal

External power supply

Standard AISG female connector of the AISG multi-wire

cable

Standard AISG male connector of the RCUStandard AISG female

Port labeled RX_IN/OUT on the upper-level RRU2W2 connectorRF cable between

Port labeled RX_IN/OUT on the lower-level RRU2W2 connector

AISG multi-wire
cable between the
RRU and the
RCU

cable for
cascaded RRUs

connector
Standard AISG female

connector

Port labeled RET/PWR_SRXU on the RRUWaterproof DB9

Standard AISG male connector of the AISG extension

cable or RCU

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

the CPRI_E port on the lower-level RRUSFP200 male connector

30

Installing the AC RRU

Installing the RRU Cables

h

The cabling cavity of the AC RRU is the same as that of the DC RRU.
The procedures for opening and closing the cover for the cabling cavity of the AC RRU are the same as

those for opening and closing the cover for the cabli ng cavity of the DC RRU.

Cable Connections of RRU

CPRI optical cable
AC RRU monitoring signal cable
DC RRU power cable
AC RRU power cable
Equipotential cable
RRU RF jumper
PGND cable

Wrap the RF jumper for t he RRU with the wat erproof
tape, and then wrap it with the PVC insulating tape.

31

Installing the AC RRU

Installing the RRU Cables

h

CPRI optical cable
Power cable between RRU and the surge protection box
External AC input power cable
Equipotential cable
PGND cable

z for Outdoor Scenarios z for Indoor Scenarios

External power
supply system

External power
supply system

The maximum length of the external AC input power cable is 70 m for the 110 V AC single-phase
power cable and 100m for the 220 V AC single-phase power cable.

32

Installing the AC RRU

Installation Checklist

i

1. The PG connectors labeled IN and OUT on the surge protection box are securely
installed and cannot be rotated with the cables.

2. The waterproof gaskets on the door of the cabling cavity of the surge protection box are
not stripped or broken.

3. The OT terminals of the cables connected to the surge protection box are securely
linked. The jackets of the cables are not damaged, and there are no uneven edges on the
cables.

4. The PG connectors are tightened, and the waterproof rings are secure.

5. The six screws on the cabling cavity of the surge protection are tightened according to
the required fastening torque.

6. The axis for the door of the cabling cavity of the surge protec tion box is not broken, and
the surface of the protection box is not scratched.

7. The cables in the surge protection box are correctly connected by referring to the
operation guide. The OT terminals are tight linked before the door of the cabling cavity is
closed.

8. The power supply to the surge protection box is cut off before installation and
maintenance.

9. The installation and maintenance of the surge protection box is not performed in rainy
or damp weather.

33

Powering On the RRU

Start

Power on the RRU

Check whether

the status of the RUN LED

is 1s ON, 1s OFF and that of

ALM LED is OFF.

Yes

End

Rectify the fault

No

When the RRU is unpacked, it must be powered on
within 24 hours.

Appendix

a

Binding the RRU and Installation Components

1. Bind the RRU by leading the lifting rope along the lower part of the adapting piece
and through the handle, bind the main and auxiliary brackets with the lifting rope, and
then bind the steering rope with the handle of the RRU, as shown in the following
figures.

Lifting rope

Lower part of the

Steering
rope

adapting piece

z When lifting the RRU and installation components to the tower,
prevent the RRU from colliding with the tower.

z The cross-sectional area of the lifting rope and steering rope is
around 20 mm, not more than 25 mm. In addition, the ropes can bear
the weight four times more than that of the RRU.

34

Do not bind the lifting rope
only on the handle when
lifting the RRU.

Appendix

Binding the RRU and Installation Components

a

2. Lifting the RRU and Installation Components to the Tower

Pulley

Steering rope

Lifting rope

z Installer A climbs onto the tower. Then, installer
A fixes the pulley to the support of the tower
platform and leads the lifting rope through the
pulley.

z Installer C uses a lifting rope to bind the RRU
and installation components as shown in the
preceding figure and then ties a knot in the steering
rope at the handle of the RRU.

z Installer B pulls the lifting rope, and at the same
time, installer C pulls the steering rope away from
the tower to prevent the RRU and installation
components from colliding with the tower.

z Installer A holds the RRU and installation
components and untie the ropes.

3. Lifting the CPRI Optical Cable up to the Tower

z Cut off a 200 mm long corrugated pipe with the
diameter of 25 mm.

z Lead the fiber tails labeled 1A and 1B of the
optical cable into the corrugated pipe by 160 mm.

z Wrap up the corrugated pipe and optical cable
with the color tape.

z For the tower made of steel pipes, tie the black
jacket to the corrugated pipe at the position 150 mm
away from the color tape, and then lift the optical
cable up to the t ower.

z For the tower made of angle steel girders, carry
the optical cable onto the tower when climbing up to
the tower.

z After the optical cable is lifted up to th e to wer,
remove the color tape and corrugated pipe before
installing the optical cable.

35

Corrugated pipe

Color tape

Appendix

Making OT Terminals by Using a Cable Peeler (Recommended)

b

Add two OT terminals to the end of the power cable connecting to the RRU.

-48V DC power cable

Shielding layer

010203040

NEG ( - )

RTN ( + )

Label for preparing

OT terminals

Determine lengths of power cables for different
operations according to the scales on the inner
side of the cover plate of the ca blin g cavity.

the power cable

Based on the determined length, remove the
jacket and shielding layer off the power cable.

14mm

Remove the jacket from each wire.

8mm

Add an OT terminal to each wire.

Strip a 15 mm jacket off the power cable to
reveal the shielding layer o f t he p o wer ca bl e

15mm

The assembling of OT terminals to th e pow e r cab l e must be com plet e b ef or e t h e RRU is inst al led o n a
metal pole.

36

Appendix

c

Adding OT Terminals to the Power Cable on the DCDU side

Wrap the PVC
insulating tape
at the joint
where the three
wires meet.

WARNING

Do not damage the shielding layer of the power cable when cutting around the jacket.

Lead the wires
made of the
shielding layers
through heat­shrinkable tubes.

OT terminal on
the shielding
layer

37

Appendix

d

Waterproofing Outdoor Cables

z The waterproof tape should be wrapped for an extra length of 20
mm away from the connectors at both ends.

z The tapes should be wrapped around the connector from the
lower part to the upper part. When wrapped for another layer, the
tapes may not be cut.

z When wrapping the waterproof tape, apply even force to extend
the tape until the width of the tape is 1/2 of the original width.

z When wrapping the waterproof tape, ensure that the upper layer
of the tape covers at least 50% of the lower layer.

z The insulating tape should be wrapped for an extra length of 20
mm away from the connectors at both ends.

z The last layer of the waterproof tape should be wrapped from the
lower part to the upper part to prevent rainwater from infiltrating into
the tape.

1. Wrap three layers of waterproof tape.

Waterproof tape

Insulating tape

2. Wrap three layers of insulating tape.

Tightly pressing the tape

Installing the Optical Module

e

Tightly pressing the tape

tie

tie

Binding cable ties at both
ends of the tape

38

Appendix

Installing the corrugated pipes of AC power cable

f

z After the corrugated pipe is installed, wrap both ends of the power
cable with waterproof tapes by referring to the following figure.

z Wrap the joint spirally upward, downward, and then upward again.
That is, the joint is wrapped by three layers of the tape. Ensure that two
adjacent layers overlap with each other about half the width of the tape.

Waterproof
tapes

Corrugated pipes Corrugated pipes

Corrugated pipes

g

Pin Assignment for the Wires of the RRU Alarm Cable ( DC )

DB15
connector

Signal name of
DB15 connector

Cord End
Terminal

X2

X3

X4

Waterproof
tapes

Connector for corrugated pipes

Color

Twisted pairWhite/blueSWITCH_INPUT0+X1.2

Twisted pairWhite/orangeSWITCH_INPUT1+X1.6

Power
system

LabelWire TypeWire

SWITCH_INPUT
0+

GNDBlueGNDX1.3

SWITCH_INPUT
1+

X5

X6

X7

X8

X9

GNDOrangeGNDX1.7

APM RX-Twisted pairWhite/ greenRX485_TX-X1.10

APM RX+GreenRX485_TX+X1.11

APM TX-Twisted pairWhite/ brownRX485_RX-X1.13

APM TX+BrownRX485_RX+X1.14

39

Changes History

This page describes the changes in the RRU3908 V1 Installation Guide.

z02 (2010-07-20)
This is the first commercial release.
Compared with (2010-05-04), the figure of the minimum clearance for RRU are optimized, and
the minimum clearance for the RRU installed on a tower requirements is added.

z01 (2010-05-04)
This is the draft release.

40

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Industrial Base Bantian Longgang

Shenzhen 518129

People’s Republic of China

www.huawei.com

Installing the DC RRU

RRU Cable Installation Scenarios

o

RRU+APM30/APM30H

Grounding the shielding layer
of the power cable:

DC RRU power cable
CPRI optical cable

Metal Shielding layer (25 mm) PGND cable

z The DC RRU power cable is connected to one of the LOAD4 to LOAD9 terminals of the PDU.
z Strip the jacket of the DC RRU power cabl e for a small part, press the exposed shielding layer on th e strap,

and then connect the PGND cable on the strap to the nearest grounding bolt on the side in the
APM30/APM30H.

z Three power cables can be led through each ground clip.

21