Huawei Technologies RRU3908-1900 Remote Radio Unit of Multi-Mode Distributed Base Station User Manual RRU3908 V1 Installation Guide
Huawei Technologies Co.,Ltd Remote Radio Unit of Multi-Mode Distributed Base Station RRU3908 V1 Installation Guide
Installation Guide
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| Document ID | 1460710 |
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| Document Description | Installation Guide |
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| Document Type | User Manual |
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| Filesize | 343.52kB (4293969 bits) |
| Date Submitted | 2011-05-08 00:00:00 |
| Date Available | 2011-11-04 00:00:00 |
| Creation Date | 2011-04-28 09:25:13 |
| Producing Software | Acrobat Distiller 7.0 (Windows) |
| Document Lastmod | 2011-04-28 09:25:13 |
| Document Title | RRU3908 V1 Installation Guide |
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RRU3908 V1 V100R003 Installation Guide Issue: 02 Date: 2010-07-20 HUAWEI TECHNOLOGIES Co., Ltd. Contents 1. Installation Tools ……………………………………………………………………………………………. 2 2. Installing the DC RRU ……………………………………………………………………………………… 3 Installation Modes ……………………………………………………………………………………. 3 Space Requirements …………………………………………………………………….. ………… Installation Procedure …………………………………………………………………………………. 6 Preparing for the installation …………………………………………………………………………. 6 Installing the RRU on a Metal Pole …………………………………………………………………. 7 Installing the RRU on a U-Steel ……………………………………………………………………. Installing the RRU on an Angle Steel ……………………………………………………………… Installing the RRU on a Wall ………………………………………………………………………… 10 Cable Connections of a Single RRU ……………………………………………………………… 13 Cable Connections of Multiple RRUs ……………………………………………………………… 13 Cable List ……………………………………………………………………………………………... 14 Installing the RRU Cables …………………………………………………………………………… 16 RRU Cable Installation Scenarios ………………………………………………………………… 18 3. Installing the AC RRU ………………………………………………………………………………... …… 23 Space Requirements ………………………………………………………………….. …………… 23 Installation Modes …………………………………………………………………………………… 23 Installing the Surge Protection Box (for Outdoor Scenarios) …………………………………… 24 Cable Connections of a Single RRU ………………………………………………………………. 27 Cable Connections of Multiple RRUs ……………………………………………………………… 27 List of Cables (No Surge Protection Box Configured) …………………………………………… 28 List of Cables (Surge protection box Configured) ………………………………………………... 29 Installing the RRU Cables …………………………………………………………………………… 31 Installation Checklist …………………………………………………………………………………. 33 4. Powering On the RRU ……………………………………………………………………………………… 34 5. Appendix …………………………………………………………………………………………………… 34 Binding the RRU and Installation Components ………………………………………………….. 34 Making OT Terminals by Using a Cable Peeler (Recommended) ……………………………... 36 Making OT Terminals at the Input End of the Power Cable by Using a Knife ………………… 37 Waterproofing Outdoor Cables ……………………………... ……………………………………… 38 Installing the Optical Module ………………………………………………………………………… 38 Installing the Corrugated Pipes of AC Power Cable …………………………………………….. 39 Pin Assignment for the Wires of the RRU Alarm Cable (DC) …………………………………… 39 6. Changes History ……………………………………………………………..………..…………..………. 40 Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved. Installation Tools Hammer drill (with bit 14) Heat gun Rubber hammer ESD gloves Vacuum cleaner Phillips screwdriver Flat-head screwdriver (M3~M6) (M3~M6) Crimping pliers Wire stripper Adjustable wrench Guarded blade utility knife Wire cutter (with the diameter of at least 32 mm) Torque wrench 5mm M3~M6 Combination wrench (21mm~21mm) for pole installation Level Torque screwdriver (17mm~17mm) for wall installation Marking pen Multimeter (with the diameter of no more than 10 mm) Measuring tape Installing the DC RRU a Installation Modes On a metal pole On a U-steel On an angle steel On a wall 30 mm to 50 mm 60 mm to 114 mm (The recommended value is 80 mm.) 63 mm to 80 mm The following figure describes the specifications for the metal pole, angle steel, and U-steel where the RRU is installed. ～ 50 mm to 100 mm 63 mm to 80 mm Metal pole Angle steel U-steel RRU Angle steel or U-steel The angle between the vertical and the angle steel or U≤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 back. 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." Installing the DC RRU b Dimensions and Installation Clearance Recommended Clearance for a Single RRU RRU Dimensions 380 mm 170 mm 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 ≥ 30 0m 485 mm 00 ≥8 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. ≥6 00 mm ≥500 mm Minimum clearance for the RRU installed on a tower 200 mm 200 mm 10 0m 280 0m 60 40 0m 40 0m 300 mm Top view Auxiliary metal pole 400 mm 300 mm Side view 280 mm Top view 100 mm 400 mm 280 mm 600 mm Main metal pole Main metal pole Auxiliary metal pole Installing the DC RRU b Dimensions and Installation Clearance Recommended Horizontal Spacing for Two RRUs Installed in Parallel ≥300 mm ≥600 mm Minimum Horizontal Spacing for Two RRUs Installed in Parallel ≥600 mm 100 mm Recommended Vertical Spacing for Two RRUs Installed in Parallel 400 mm 400 mm Minimum Vertical Spacing for Two RRUs Installed in Parallel ≥300 mm 200 mm ≥500 mm 300 mm ≥500 mm 300 mm Installing the DC RRU c Installation Procedure d Preparing for the Installation Cover plate Attachment plate Auxiliary bracket Dual-nut bolt Main bracket Front Main and auxiliary brackets for the RRU Back Installing the DC RRU e Installing a Single RRU on a Metal Pole 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 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. 40N•m 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 the RRU is low. Do not place the RRU at its bottom. z During the operation, place the foam pad or cardboard under the RRU to prevent any damage to the housing of the RRU. Installing the DC RRU Cable List Cable Connector Type Connected to… AISG multi-wire cable between the RRU and the RCU Waterproof DB9 connector Port labeled RET on the RRU Standard AISG female connector Standard AISG male connector of the AISG extension cable or RCU AISG extended cable between the RRU and the RCU Standard AISG male connector Standard AISG female connector of the AISG multi-wire cable Standard AISG female connector Standard AISG male connector of the RCU RF cable between RRUs 2W2 connector Port labeled RX_IN/OUT on the upper-level RRU 2W2 connector Port labeled RX_IN/OUT on the lower-level RRU DB15 male connector Port labeled EXT_ALM in the RRU cabling cavity Eight cord end terminals External alarm devices SFP200 male connector the CPRI_E port on the upper-level RRU SFP200 male connector the CPRI_W port on the lower-level RRU DC RRU alarm cable SFP high-speed cable for cascading 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 Cable trough for the power cable Cable trough for the optical cable Cable trough for the power cable Reference for making the power cable Cabling cavity Cover plate of the cabling cavity Waterproofing filler 16 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 Insulating tape Insulating tape Dustproof cap 4. Closing the Cover Plate of the RRU Cabling Cavity. M4 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. 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 1.4N•m 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 o RRU Cable Installation Scenarios RRU+Wall-Mounted BBU DC RRU power cable LOAD0 CPRI optical cable 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 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. 18 Installing the DC RRU o RRU Cable Installation Scenarios 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 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. 19 Installing the DC RRU o RRU Cable Installation Scenarios 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. DC RRU power cable CPRI optical cable –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 Installing the DC RRU Installing Two RRUs Back-To-Back on a Metal Pole 1. Install an RRU. For details, see page 6 Installing a Single RRU on a Metal Pole. 2. Install the main fixture for another RRU. 3. Reinstall the attachment plate and cover plate on the second RRU by interchanging their positions. M6X16 5N•m 4. Install the second RRU on the main bracket. In reverse mode In standard mode Ensure that the cabling cavities of the two RRUs face the same direction when installing the RRUs. Cabling cavity Installing the DC RRU g Installing the RRU on a U-Steel Plan view U-steel z The procedure 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. h Installing the RRU on an Angle Steel Plan view Angle steel z The procedure for installing the RRU on an angle steel is the same as that on a metal pole. z Only one RRU can be installed on an angle steel. Installing the DC RRU Installing the RRU on a Wall 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 126 mm 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 be prepared for each RRU. 126 mm RRU 1200 mm～1600 mm 2. Drill holes at the anchor points and then install the expansion bolt assemblies. M10x65 bolt Spring washer 10 Plastic tube Ø14 Flat washer 10 Expansion tube 90° 55 mm to 60 mm 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 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 5. Install the RRU. 11 4. Install the main bracket. Installing the DC RRU Installing the RRU on a Wall 6. Install multiple RRUs. Recommended Clearance : ≥430 mm ≥760 mm ≥760 mm ≥730 mm 650 mm 530 mm Minimum Clearance: 230 mm ≥535 mm 12 650 mm ≥70 mm ≥70 mm ≥535 mm Installing the DC RRU Cable Connections of a Single RRU DC RRU alarm cable CPRI optical cable Install the PGND cable Antenna DC RRU power cable RF cable between RFUs AISG multi-wire cable between the RRU and the RCU Install the RF jumper (RF cable between RFUs is optional) Install the DC RRU power cable RRU RF jumper RCU Feeder Install the CPRI optical cable AISG extended cable between the RRU and the RCU PGND 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 power supply 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. Cable Connections of Multiple RRUs 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. 13 Installing the DC RRU Cable List Cable Connector Type Connected to… PGND cable OT terminal ( M6 ) Grounding bolt on the RRU (16 mm²) OT terminal ( M8 ) Nearest grounding bar RRU RF jumper DIN male connector Ports labeled ANT-A and ANT-B on the RRU DIN male connector Feeder or antenna Two OT terminals ( M4 ) z North American standard: DC RRU power cable The OT terminal on the blue wire is connected to the NEG(-) port on the cabling cavity of the RRU. The OT terminal on the black wire is connected to the RTN(+) port on the cabling cavity of the RRU ( North American standard: 2AWG European standard: 4 mm² ) z European standard: The OT terminal on the blue wire is connected to the NEG(-) port on the cabling cavity of the RRU. The OT terminal on the brown wire is connected to the RTN(+) port on the cabling cavity of the RRU North American standard: European standard: Bare wire External power supply North American standard: European standard: CPRI optical cable DLC connector Connect the fiber tails labeled 1A and 1B to the CPRI_W port on the RRU DLC connector 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 o RRU Cable Installation Scenarios RRU+TMC Grounding the shielding layer of the power cable: Metal Shielding layer (25 mm) PGND cable DC RRU power cable CPRI optical 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 a Space Requirements 380 mm 250 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. 485 mm bb Installation Modes On a metal pole On a U-steel On an angle 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 75 mm 305 mm 240 mm Hoop iron Recommended clearance for the surge protection box. Minimal clearance for the surge protection box. ≥100 mm ≥ 10 0m 50 mm 50 ≥ mm 00 ≥5 50 0m 30 0m mm 300 ≥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. Installing the surge protection box on the wall 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 diameter, there is a long extra part of the hoop. It is recommended that the extra part be cut. z when installing the surge protection box, 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. 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 OUT OUT IN AC IN PG connector Thread-lock sealing nut 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. 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 insulating layer is tightly pressed by the strap. 5. Connect the PGND cable. PGND cable Equipotential cable 1.4N•m 26 Installing the AC RRU d Cable Connections of a Single RRU AC RRU monitoring signal cable Antenna 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 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 ) e Cable Connections of Multiple RRUs 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) Cable Connector Type Connected to… PGND cable OT terminal (M6) Grounding bolt on the RRU OT terminal (M8) Nearest grounding bar DIN male connector Ports labeled ANT-A and ANT-B on the RRU DIN male connector Feeder or antenna Round connector Port labeled AC_in on the RRU To be made depending on field requirements External power supply DLC connector Connect the fiber tails labeled 1A and 1B to the CPRI_W port on the RRU DLC connector Connect the fiber tails labeled 2A and 2B to one of the CPRI0 to CPRI5 ports on the WBBP or GTMU Waterproof DB9 connector Port labeled RET on the RRU Standard AISG female connector Standard AISG male connector of the AISG extension cable or RCU (16 mm²) RRU RF jumper AC RRU power cable (1.5mm²) CPRI optical cable AISG multi-wire cable between the RRU and the RCU 28 Installing the AC RRU f List of Cables (No Surge Protection Box Configured) Cable Connector Type Connected to… AISG extended cable between the RRU and the RCU Standard AISG male connector Standard AISG female connector of the AISG multi-wire cable Standard AISG female connector Standard AISG male connector of the RCU RF cable between RRUs 2W2 connector Port labeled RX_IN/OUT on the RRU 2W2 connector Port labeled RX_IN/OUT on the RRU SFP high-speed cable for cascaded RRUs SFP200 male connector the CPRI_E port on the upper-level RRU SFP200 male connector the CPRI_W port on the lower-level RRU g List of Cables (Surge protection box Configured) Cable Connector Type Connected to… PGND cable OT terminal (M6) Grounding bolt on the surge protection box (16 mm²) OT terminal (M8) Nearest grounding bar CPRI optical cable DLC connector Connect the fiber tails labeled 1A and 1B to the CPRI_W port on the RRU DLC connector Connect the fiber tails labeled 2A and 2B to one of the CPRI0 to CPRI5 ports on the GTMU DIN male connector Ports labeled ANT-A and ANT-B on the RRU DIN male connector Feeder or antenna RRU RF jumper 29 Installing the AC RRU g List of Cables (Surge protection box Configured) Cable Connector Type Connected to… Power cable between RRU and the surge protection box Round connector Port labeled AC IN on the RRU OT terminal The Lout, Nout, and PE terminals on the surge protection box OT terminal The Lin, Nin, and PE terminals on the surge protection box To be made depending on field requirements External power supply Standard AISG male connector Standard AISG female connector of the AISG multi-wire cable Standard AISG female connector Standard AISG male connector of the RCU RF cable between RRUs 2W2 connector Port labeled RX_IN/OUT on the upper-level RRU 2W2 connector Port labeled RX_IN/OUT on the lower-level RRU AISG multi-wire cable between the RRU and the RCU Waterproof DB9 connector Port labeled RET/PWR_SRXU on the RRU Standard AISG female connector Standard AISG male connector of the AISG extension cable or RCU SFP200 male connector the CPRI_W port on the upper-level RRU SFP200 male connector the CPRI_E port on the lower-level RRU (1.5 mm²) External AC input power cable (4 mm²) AISG extended cable between the RRU and the RCU SFP high-speed cable for cascaded RRUs 30 Installing the AC RRU h Installing the RRU Cables 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 cabling 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 the RRU with the waterproof tape, and then wrap it with the PVC insulating tape. 31 Installing the AC RRU h Installing the RRU Cables 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 i Installation Checklist 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 protection 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 Rectify the fault Check whether the status of the RUN LED is 1s ON, 1s OFF and that of ALM LED is OFF. No Yes End 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 Steering rope Lower part of the 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 a Binding the RRU and Installation Components 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 tower. 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 the tower, remove the color tape and corrugated pipe before installing the optical cable. 35 Corrugated pipe Color tape Appendix b Making OT Terminals by Using a Cable Peeler (Recommended) Add two OT terminals to the end of the power cable connecting to the RRU. -48V DC power cable NEG ( - ) OT terminals Label for preparing the power cable Shielding layer RTN ( + ) Determine lengths of power cables for different operations according to the scales on the inner side of the cover plate of the cabling cavity. 10 20 30 40 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 of the power cable 15mm The assembling of OT terminals to the power cable must be complete before the RRU is installed on a metal pole. 36 Appendix c Adding OT Terminals to the Power Cable on the DCDU side Lead the wires made of the shielding layers through heatshrinkable tubes. 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. 37 OT terminal on the shielding layer 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. Insulating tape Waterproof tape 1. Wrap three layers of waterproof tape. Tightly pressing the tape 2. Wrap three layers of insulating tape. tie tie Tightly pressing the tape e Installing the Optical Module 38 Binding cable ties at both ends of the tape Appendix f Installing the corrugated pipes of AC power cable 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 Waterproof tapes Connector for corrugated pipes Power system 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 Wire Color Wire Type Label X1.2 SWITCH_INPUT0+ X2 White/blue Twisted pair SWITCH_INPUT 0+ X1.3 GND X3 Blue X1.6 SWITCH_INPUT1+ X4 White/orange X1.7 GND X5 Orange X1.10 RX485_TX- X6 White/ green X1.11 RX485_TX+ X7 Green X1.13 RX485_RX- X8 White/ brown X1.14 RX485_RX+ X9 Brown 39 GND Twisted pair SWITCH_INPUT 1+ GND Twisted pair APM RXAPM RX+ Twisted pair APM TXAPM TX+ 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 o RRU Cable Installation Scenarios RRU+APM30/APM30H Grounding the shielding layer of the power cable: Metal Shielding layer (25 mm) PGND cable DC RRU power cable CPRI optical 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 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. z Three power cables can be led through each ground clip. 21
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