Installing the RRU Cables
b
Open the cover plate of the
RRU cabling cavity
Cabling cavity
Cover plate of the
cabling cavity
C
Cabling Cavity of the RRU
Cable trough for the optical cable
Cable trough for the
power cable
Waterproof filler
d
layer of the
power cable
Cable Connections of the RRU
Grounding
screw
OT terminal
PGND cable
Shielding
Strap
Waterproof
tape
15
Installing the RRU Cables
d
Cable Connections of the RRU
z Use the power cable clip to press the shielding layer tightly and ensure that the lower part of the shielding layer does n ot
exceed the position shown in the preceding figure.
z The grounding resistance of the PGND cable should be less than 10 ohms. The PGND cable cannot be connected to the
grounding terminal.
z Ground the shielding layer of the other end of the power cable.
z After the cables are installed on the RRU, insert the waterproofing fillers into the idle cable holes.
z When wrapping the waterproofing tape, apply even force to extend the tape until the width of the tape is 1/2 of the
original width.
z Wrap the joint spirally upward, downward, and then upward again. In other words, the joint is wrapped by three layers of
the tape. Ensure that the upper layer of the tape covers about half of the lower layer when wrapping up the tape.
z Do not remove the dustproof cap from the idle antenna port. Perform the waterproof, dustproof, and smokeproof
treatment if necessary. Use the waterproof tape to wrap the joints in outdoor applications.
For details on how to add the OT terminals to the power cable, see pages 22 to 23 Adding
OT Terminals to the Power Cable of the RRU.
For details installing the Optical Module, see page 24 Installing the Optical Module.
e
Close the cover plate of the RRU cabling cavity
1.4N•m
1. The screw on the cover plate is tightened until the
fastening torque is 1.4 N• m.
2. The screws on the cover plate are tightened in the
order shown in the preceding figure
.
16
Installing the RRU Cables
f
RRU+APM30H
Grounding the shielding layer of the power cable:
25mm
Metal shielding layer
(25mm)
a
a
RRU power cable
CPRI optical cable
b
b
RRU power
cable
g
1. The RRU power cable is connected to one group of the RRU0 to RRU5 terminals of the PDU.
2. Strip the jacket off the RRU power cable for a small part, press the exposed shielding layer on the strap, and
then connect the PGND cable on the strap to the nearest grounding bolt on the side in the APM30/APM30H.
RRU+TMC/TMC11H
LOAD0
Grounding the shielding layer of the power cable:
25mm
Metal shielding layer
(25mm)
The RRU power cable is connected to
LOAD0 to LOAD5 on the DCDU-03C.
a
b
a
RRU power cable
CPRI optical cable
b
17
Installing the RRU Cables
h
RRU+19-Inch cabinet
LOAD0
RRU power cable
b
z At the end of the RRU power cable connected to the DCDU-03C, you need to make the shielding la yer of the power
cable into an OT terminal, and then connect the OT terminal to the PGND terminal of the corresponding port on the
DCDU-03C. For details about making an OT terminal, see pages 26 and 27.
z The RRU power cable is connected to LOAD0 to LOAD5 on the DCDU-03C.
a
a
b
CPRI optical cable
RRU+BBU Installed Against the Wall
i
a
RRU power cable
b
CPRI optical cable
c
BBU power cable
d
PGND cable
a
c
b
d
d
a
b
RRU
BBU
zThe RRU power cable is connected to LOAD0 to LOAD5 on the DCDU-03C.
18
RRU Hardware Installation Checklist
ItemsNo.
1
4
7
9
10
The position for each equipment conforms to the engineering design and meets the space requirement.
Sufficient space is reserved for equipment maintenance.
The RRU is properly installed.2
The cover plate is fastened to the RRU cabling cavity.3
Waterproof check: The empty cable troughs in the cabling cavity of the RRU are waterproofed. The cover
plate is tightly buckled on the cabling cavity of the RRU. The RF ports that are not connected with RF
cables are capped and waterproofed. The waterproof caps are fastened.
No joint lies in the middle of the power cable or the PGND cable.5
The lugs at both ends of the power cable or the PGND cable are securely soldered or crimped.6
The power cable and PGND cable are not short-circuited or reversely connected and are not damaged or
broken.
The power cable, PGND cable and other cables need to be bound separately.8
The operating grounding and protection grounding of the base station and the lightning protection grounding
of the building share one group of grounding conductors.
The connectors of signal cables are intact and securely linked. And the signal cables are not damaged or
broken.
11
All labels, tags, and nameplates are correct, legible, and complete. All the labels at both ends of the cables,
jumpers and feeders should match.
Powering On the RRU
Start
a
Check whether the
input voltage of the RRU is
normal?
Yes
Power on the RRU
b
Check whether the
status of the LEDs on the
RRU is normal?
No
No
Rectify the fault
Rectify the fault
Power off the RRU
a
Normal input voltage of the
RRU:
If the BBU is supplied with
-48 V DC power, the
external input power
voltage ranges from -57 V
DC to -36 V DC.
b
Normal status of the
LEDs on the RRU:
RUN LED: ON for 1s
and OFF for 1s
ALM LED: OFF
Yes
End
The RRU should be powered on in 24 hours
after being unpacked. The power off duration
of the RRU cannot exceed 24 hours during
maintenance.
19
Reference
Lift the RRU and installation components to the tower.
a
1. Lead the lifting rope along the lower part of the adapting piece and th en bind the
RRU by using the lifting rope at the handle of the RRU. Bind the main fixture and
auxiliary fixture by using the lifting rope. Bind the handle of the RRU by using the
pulling rope. See the following figure.
Lifting rope
Steering rope
Lower part of the
adapting piece
zWhen lifting the RRU to the tower, avoid collision of the RRU with the tower.
zLift the RRU to the tower before it is installed on the metal pole, angle steel, or U-steel.
Do not fix only the handle
of the RRU to the lifting
rope.
20
Reference
Lift the RRU and installation components to the tower.
a
2. Lift the RRU and installation components to the tower.
Fixed pulley
Lifting rope
z Installer A climbs up to the tower, installs the fixed pulley on the support of the tower platform, and then leads the lifting
rope through the fixed pulley.
z Installer C binds the RRU and installation parts using the lifting rope and fixes the handle of the RRU to the pulling rope.
z Installer B pulls the lifting rope downwards. At the same time, installer C pulls the steering rope outwards to avoid
collision of the RRU with the installation parts or tower.
z Installers A catches the RRU and installation parts and then loosen the rope.
z On a tower, multiple RRUs cannot be installed in centralized mode.
Steering rope
21
Reference
b
Adding OT Terminals to the Power Cable of the RRU
1. OT terminals on the power cable:
-48 V DC power cable
Shielding
layer
To assemble the OT terminals, perform the following steps:
-48 V power wire
OT terminal
GND wire
0 10203040
Determine lengths of power cables for
different operations according to the
scales on the inner side of the cover
plate of the cabling cavity.
15mm
14mm
Based on the determined length,
remove the jacket and shielding layer
off the power cable.
8mm
Remove the jacket of a specified length
from each wire.
Add an OT terminal to each wire.
Remove about 15 mm jacket off the
power cable to expose the shielding
layer.
22
Reference
b
Adding OT Terminals to the Power Cable of the RRU
2.Assemble an OT terminal on the power cable at the end connecting to the
power supply device.
Determine the length on
site. The recommended
length is 150 mm.
Stripped shielding
layer in the heat-
shrinkable tube
PVC insulating tape
23
OT terminal on the
shielding layer
Reference
Waterproofing the outdoor cables
c
1. The waterproof tape should be wrapped for an extra length of 20
mm away from the connectors at both ends.
2. The tapes are wrapped around the connector from the lower part to
the upper part. When wrapped for another layer, the tapes may not be
cut off.
3. Apply average force to pull the tape until the width of the tape is 1/2
of the original width before wrapping up the waterproofing tape.
4. Ensure that the upper layer of the tape covers over 50% of the lower
layer when wrapping up the tape.
5. The Insulation tape should be wrapped for an extra length of 20 mm
away from the edge of the waterproof tape at both ends.
6. Make sure that the last layer of the waterproof tape is wrapped from
lower part to the upper part so that the rain flows along the wrapped
waterproof tape.
Waterproof tape
1. Wrap up the connectors with three layers of waterproofing tape
Tightly pressed
the tape
2. Wrap up the connectors with three layers of Insulation tape
Insulation tape
Cable tie
Cable
tie
Tightly pressed
the tape
Installing the optical Module
d
Use cable ties to fasten
both ends of the tapes.
24
Reference
f
g
Pin Assignment of the RRU AISG Extension cable
Pin of the AISG
male connector
Pin Assignment for the Wires of the RRU Alarm Cable
InstructionWire TypeWire ColorPin of the AISG female
connector
+12VTwisted pairWhite/blueX2.1X1.1
Blue
DC Return ATwisted pairWhite/orangeX2.7X1.7
Orange
RS485 BTwisted pairWhite/greenX2.3X1.3
RS485 AGreenX2.5X1.5
+24VTwisted pairWhite/brownX2.6X1.6
Brown
waterproof
Connector
Cord End
Terminal
X2
X3
X4
X5
X6
X7
White/brownRS485_RX-X1.5
BrownRS485_RX+X1.3
Twisted pair
Shield
X8
-
LabelWire TypeWire ColorPin NameDB9
SWITCH_INPUT0+Twisted pairWhite/blueSWITCH_INPUT0+X1.2
GNDBlueGNDX1.4
SWITCH_INPUT1+Twisted pairWhite/orangeSWITCH_INPUT1+X1.7
GNDOrangeGNDX1.4
APM RX-Twisted pairWhite/greenRS485_TX-X1.6
APM RX+GreenRS485_TX+X1.8
APM TX-
APM TX+X9
---X1.shell
25
Change History
This describes the changes in the RRU3201 V100R001C01 Installation Guide
01 (2009-06-05)
This is the draft release.
26
HUAWEI TECHNOLOGIES CO., LTD.
Huawei Industrial Base Bantian Longgang
Shenzhen 518129
People’s Republic of China
www.huawei.com
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