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Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent 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.
About This Document About This Document Purpose This document describes the process of installing DC blade RRU3971 (referred to as RRU in this document). Product Versions The following table lists the product versions related to this document. Product Name Solution Version Product Version DBS3900 l SRAN9.0 V100R009C00 l GBSS16.0 l eRAN7.0 l SRAN10.1 and later versions V100R010C10 and later versions l GBSS17.1 and later versions l eRAN8.
About This Document This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have. 3 Information About the Installation Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements.
About This Document Symbol Description Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. Calls attention to important information, best practices and tips.
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Contents Contents About This Document.....................................................................................................................ii 1 Changes in RRU3971 Installation Guide..................................................................................1 2 Installation Preparations..............................................................................................................2 2.1 Reference Documents.....................................................................
Contents 7.6 Installing an RRU on an IFS06.....................................................................................................................................78 8 Installing RRU Cables................................................................................................................85 8.1 Cabling Requirements..................................................................................................................................................87 8.
1 Changes in RRU3971 Installation Guide 1 Changes in RRU3971 Installation Guide This section describes the changes in the RRU3971 Installation Guide. Draft A (2015-09-30) This is a draft. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
2 Installation Preparations 2 Installation Preparations About This Chapter This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have. 2.1 Reference Documents Before the installation, you must be familiar with reference documents. 2.2 Tools and Instruments You must prepare the following tools and instruments before the installation. 2.
2 Installation Preparations 2.1 Reference Documents Before the installation, you must be familiar with reference documents. The following reference documents are required during RRU installation: l RRU3971 Hardware Description l DBS3900 Installation Guide l OCB User Guide l OCB-01M User Guide 2.2 Tools and Instruments You must prepare the following tools and instruments before the installation.
2 Installation Preparations Utility knife Cable cutter Adjustable wrench (size ≥ 32 mm [1.26 in.]) Torque wrench Size: 16 mm (0.63 in.) and 22 mm (0.87 in.) Combination wrench Size: 16 mm (0.63 in.) and 22 mm (0.87 in.) Torque screwdriver Level Torque socket 5 mm 5 mm (M3 to M6) (M3 to M6) Multimeter Marker (diameter ≤ 10 mm [0.39 in.]) Measuring tape Inner hexagon wrench Fixed pulley(weight-bearing capacity > 500 kg or 1102.
2 Installation Preparations 2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions. Before the installation, pay attention to the following items: Issue () l The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods.
3 Information About the Installation 3 Information About the Installation About This Chapter Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements. 3.1 RRU Exterior This section describes the exterior and dimensions of an RRU. 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. 3.
3 Information About the Installation 3.1 RRU Exterior This section describes the exterior and dimensions of an RRU. Figure 3-1 shows the exterior of an RRU. Figure 3-1 RRU exterior Figure 3-2 shows RRU dimensions. Figure 3-2 RRU dimensions Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation You can obtain the RRU name, RRU frequency band and power supply information from the nameplate on the cover plate. Figure 3-3 shows the positions of the nameplate on the RRU. NOTE The actual nameplate may differ from what is shown in the figure. Figure 3-3 Positions of the nameplate (1) Nameplate (2) Module name (3) Frequency band (4) Power supply module 3.2 RRU Ports This section describes ports on the RRU panels.
3 Information About the Installation Figure 3-4 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels. Table 3-1 Ports and indicators on the RRU panels Issue () Item Silkscreen Remarks (1) Ports in the cabling cavity RTN(+) Power supply socket, for details about RRU power cable experience and specifications, see RRU Power Cable.
3 Information About the Installation Item Silkscreen Remarks (2) Bottom ports A T/R TX/RX port A, supporting RET signal transmission C T/R TX/RX port C D T/R TX/RX port D B T/R TX/RX port B, supporting RET signal transmission EXT_ALM Alarm monitoring port used for monitoring one RS485 signal and two dry contact signals RET Communication port for the RET antenna, supporting RET signal transmission RUN For details, see 3.3 RRU Indicators.
3 Information About the Installation Indicator ALM ACT VSWR CPRI0 CPRI1 Issue () Color Red Green Red Red and green Red and green Status Meaning Blinking (on for 1s and off for 1s) The board is running properly. Blinking (on for 0.125s and off for 0.125s) The board software is being loaded or the board is not working. Steady on Alarms are generated, and the module must be replaced. Blinking (on for 1s and off for 1s) Alarms are generated.
3 Information About the Installation Indicator Color Status Meaning Steady red An optical module fails to receive or transmit signals possibly because the optical module is faulty or the optical fiber is broken. Blinking red (on for 1s and off for 1s) The CPRI link is out of lock because of faults on the mutual lock of dual-mode clock sources or mismatched data rates on CPRI ports. Steady off The optical module cannot be detected or is powered off.
3 Information About the Installation Figure 3-5 inappropriately installed RRU Correct installation methods: l The installation supports' specifications described in this document are only based on the exterior and dimensions of the mounting kits. Before installing equipment, assess the strength and reliability of the installation support to determine whether it can bear the weight of the equipment.
3 Information About the Installation Installing an RRU on a Pole Figure 3-7 shows the diameter of a pole for installing an RRU. Figure 3-7 Diameter of a pole NOTICE l The diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49 in.). The recommended diameter is 80 mm (3.15 in.). l When the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of three RRUs can be installed on the pole and the side-mounted installation is recommended.
3 Information About the Installation Figure 3-8 A single RRU installed on a pole Figure 3-9 shows two RRUs installed on a pole. Figure 3-9 Two RRUs installed on a pole Figure 3-10, Figure 3-11, and Figure 3-12 show multiple RRUs installed on a pole. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-10 Three RRUs installed on a pole Figure 3-11 Four RRUs installed on a pole Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-12 Six RRUs installed on a pole Installing an RRU on U-Steel Figure 3-13 shows U-steel specifications. Figure 3-13 U-steel specifications NOTICE U-steel only supports the standard installation of a single RRU. Figure 3-14 shows an RRU installed on U-steel. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-14 RRU installed on U-steel Installing an RRU on Angle Steel Figure 3-15 shows angle steel specifications. Figure 3-15 Angle steel specifications NOTICE Angle steel only supports the standard installation of a single RRU. Figure 3-16 shows an RRU installed on angle steel. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-16 RRU installed on angle steel Installing an RRU on a Wall The wall for installing RRUs must meet the following requirements: l For each RRU, the wall must be able to bear a weight four times heavier than the RRU's weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall. l Expansion bolts must be tightened to 30 N•m to ensure that the bolts work properly and the wall remains intact.
3 Information About the Installation Figure 3-18 shows an RRU installed on a wall. Figure 3-18 RRU installed on a wall Installing an RRU on an IFS06 l The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for heights of RRUs. l The IFS06 supports at least three RRUs when the ambient temperature is higher than or equal to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than the highest operating temperature of the RRUs.
3 Information About the Installation Figure 3-19 Correct installation of mounting brackets for RRUs installed on an IFS06 Figure 3-20 and Figure 3-21 show RRUs installed on an IFS06. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-20 Three RRUs installed on an IFS06 (1) Height-restricted scenario Issue () (2) Height-unrestricted scenario Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-21 Six RRUs installed on an IFS06 (1) Height-restricted scenario (2) Height-unrestricted scenario 3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs. 3.5.1 Clearance for a Single RRU This section describes the recommended and minimum clearances for a single RRU.
3 Information About the Installation NOTICE If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or more as recommended) away from the bitumen ground. The following describes the space requirements for installing a single RRU on the non-bitumen ground. NOTE l The recommended clearances ensure normal running and provide appropriate space for operation and maintenance (O&M).
3 Information About the Installation Figure 3-22 Clearance for a single RRU in side-mounted mode Clearance for a Single RRU in Standard Mode Figure 3-23 shows the clearance for a single RRU in standard mode. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-23 Clearance for a single RRU in standard mode Clearance for a Single Tower-Mounted RRU Figure 3-24 and Figure 3-25 show the minimum clearances for a single RRU in side-mounted mode and standard mode on a tower. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-24 Minimum clearance for a single RRU in side-mounted mode on a Figure 3-25 Minimum clearance for a single RRU in standard mode on a tower 3.5.2 Clearance for Three or More RRUs This section describes the recommended and minimum clearances for three or more RRUs. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation NOTICE If an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm or more as recommended) away from the bitumen ground. The following describes the space requirements for installing multiple RRUs on the non-bitumen ground. NOTE l The recommended clearances ensure normal running and provide appropriate space for operation and maintenance (O&M).
3 Information About the Installation Figure 3-27 Minimum clearances for three or more RRUs installed in centralized mode Recommended Clearances for Three or More RRUs Installed in Standard Mode on a Wall Figure 3-28 shows the recommended clearances for three or more RRUs installed in standard mode on a wall. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Figure 3-28 Recommended clearances for three or more RRUs installed in standard mode on a wall Minimum Clearances for Three or More RRUs Installed in Standard Mode on a Wall Figure 3-29 shows the minimum clearances for three or more RRUs installed in standard mode on a wall. Figure 3-29 Minimum clearances for three or more RRUs installed in standard mode on a wall Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Recommended Clearances for Three or More RRUs Installed in Side-Mounted Mode on a Wall Figure 3-30 shows the recommended clearances for three or more RRUs installed in sidemounted mode on a wall. Figure 3-30 Recommended clearances for three or more RRUs installed in side-mounted mode on a wall 3.5.3 Installation Spacing Between RRUs This section describes the horizontal and vertical spacing between RRUs.
3 Information About the Installation Minimum Horizontal Spacing Between RRUs Figure 3-32 shows the minimum horizontal spacing between RRUs. Figure 3-32 Minimum horizontal spacing between RRUs Recommended Vertical Spacing Between RRUs Figure 3-33 shows the recommended vertical spacing between RRUs. Figure 3-33 Recommended vertical spacing between RRUs Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
3 Information About the Installation Minimum Vertical Spacing Between RRUs Figure 3-34 shows the minimum vertical spacing between RRUs. Figure 3-34 Minimum vertical spacing between RRUs Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
4 Unpacking the Equipment 4 Unpacking the Equipment This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact. Context NOTE When transporting, moving, or installing the equipment, components, or parts, you must: l Prevent them from colliding with doors, walls, shelves, or other objects. l Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweatsoaked gloves, or dirty gloves.
4 Unpacking the Equipment If ... Then ... The outer packing is intact Go to Step 3. The outer packing is severely damaged or Find out the cause and report it to the local soaked Huawei office. Step 3 Check the type and quantity of the equipment in the cases according to the packing list. If ... Then ... Types and quantity of the article tally with Sign the Packing List with the customer. those on the packing list Either shipment shortage, wrong shipment Report to the local Huawei office.
5 Installation Process 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on an RRU. Figure 5-1 shows the installation process. Figure 5-1 Process of installing an RRU Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
6 Hoisting an RRU and Related Cables onto a Tower 6 Hoisting an RRU and Related Cables onto a Tower About This Chapter This section describes the procedure for hoisting an RRU and related cables onto a tower and the precautions that must be taken. 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle steel. 6.
6 Hoisting an RRU and Related Cables onto a Tower 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle steel. Prerequisites When the RRU is powered by an AC/DC power module, you need to install the AC/DC power module onto the RRU before hoisting them onto a tower.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-1 Binding mounting kits for the RRU (1) Lifting sling (2) Traction sling Step 3 Technician A catches the mounting kits and then unties the slings. Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in 7.2.1 Installing a Single RRU. Step 5 Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 6-2. The binding methods in Figure 6-3 and Figure 6-4 are incorrect.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-2 Binding the RRU (1) Handle (2) Lifting sling (3) Traction eye (4) Traction sling Figure 6-3 Incorrect binding method (1) Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-4 Incorrect binding method (2) Step 6 Hoist the RRU onto the tower, as shown in Figure 6-5. Technician B pulls the lifting sling downwards, and technician C pulls the traction sling outwards to protect the RRU from colliding with the tower. Figure 6-5 Hoisting the RRU onto the tower (1) Lifting sling Issue () (2) Fixed pulley Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
6 Hoisting an RRU and Related Cables onto a Tower NOTICE l The load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the diameter of each sling must be less than 25 mm (0.98 in.). l When hoisting each device onto a tower, protect them from colliding with the tower. l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel. l Do not hoist any thing by the traction eye. Step 7 Technician A catches the RRU hoisted onto the tower.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-6 Hoisting fiber optic cables onto the tower (1) Lifting sling (2) Fixed pulley (3) Traction sling NOTICE Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU or BBU based on the labels on both ends of the cables and determine the hoisting direction. Issue () 1.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-7 Binding fiber optic cables (1) Lifting sling (2) Stretch sling (3) Traction sling NOTICE Do not remove the stretch sling and protection pipe or bind fiber optic cables using one sling, as shown in Figure 6-8. Figure 6-8 Incorrect binding method Issue () 3. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21 ft) per minute to coil the fiber optic cables. 4.
6 Hoisting an RRU and Related Cables onto a Tower Step 2 Secure the fiber optic cables to the tower vertically using cable clips. Step 3 Remove the lifting sling, traction sling, and protection pipe. NOTE The procedure for hoisting the fiber optic cables onto the tower is for your reference only. ----End 6.3 Hoisting Power Cables onto a Tower This section describes the procedure for hoisting power cables onto a tower and the precautions that must be taken.
6 Hoisting an RRU and Related Cables onto a Tower 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. 2. Installation engineer B secures three cable ties to the power cable connector, and then secures the power cable to the lifting sling, as shown in Figure 6-10. NOTE The connector on the power cable in the figure is only an example.
6 Hoisting an RRU and Related Cables onto a Tower Figure 6-11 Wrapping the PVC insulation tape 4. Installation engineer C pulls the lifting sling downwards, and installation engineer B pulls the other end of the lifting sling outwards to protect the power cables from colliding with the tower. Step 2 Secure the power cables to the tower vertically using cable clips. Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.
7 Installing the RRU 7 Installing the RRU About This Chapter This chapter describes the procedure for installing the RRU. The procedure for installing the RRU varies depending on installation options. 7.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. 7.2 Installing the RRU on a Pole One or more RRUs can be installed on a pole. 7.3 Installing an RRU on U-steel This section describes the procedure and precautions for installing an RRU on U-steel.
7 Installing the RRU 7.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. Figure 7-1 shows the front and side of an RRU. Figure 7-1 Front and side view of an RRU (1) Front view (2) Side view (3) Attachment plate NOTE When the operator faces the RRU whose handle and cabling cavity are on the right-hand side, the side facing the operator is the front of the RRU. Figure 7-2 shows the bracket assembly for an RRU.
7 Installing the RRU Figure 7-2 12 L blade RRU mounting kit (1) Plastic cap (2) Standard M10 nut (3) Spring washer (6) Hoist clamp on (7) Main bracket the main bracket (8) Inner hexagon screw (4) Thick flat washer (5) Square-neck bolt (9) Pole installation bracket (10) Auxiliary bracket 7.2 Installing the RRU on a Pole One or more RRUs can be installed on a pole. 7.2.1 Installing a Single RRU This section describes the procedure and precautions for installing a single RRU on a pole.
7 Installing the RRU Procedure Step 1 Determine a position for installing the mounting brackets. l If the RRU is installed on a tower, determine a position for installing the mounting brackets according to the instructions in 3.5.1 Clearance for a Single RRU. l If the RRU is installed on the ground, determine a position for installing the mounting brackets according to Figure 7-3.
7 Installing the RRU NOTE Ensure that the arrows on the mounting brackets are pointing up. 1. Adjust the position of the nut and remove the square-neck bolt at the open end from the slot on the auxiliary bracket. 2. Slide the mounting brackets onto the pole horizontally and insert the square-neck bolt into the slot. Step 3 Use a 16 mm (0.63 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that the mounting brackets are secured onto the pole, as shown in Figure 7-5.
7 Installing the RRU Figure 7-6 Installing the RRU onto the main bracket Step 5 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-7. Figure 7-7 Securing the captive screw into the connection hole ----End 7.2.
7 Installing the RRU NOTICE l Do not stand an RRU upright because the RF ports cannot support the weight of the RRU. l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage during the installation. Procedure Step 1 Install the first RRU onto the main bracket, as shown in Figure 7-8. For details, see 7.2.1 Installing a Single RRU.
7 Installing the RRU Figure 7-9 Removing the RRU main bracket (1) Main bracket (2) Pole installation bracket Step 3 Install the removed main bracket on one side of the first main bracket, as shown in Figure 7-10. NOTICE The second main bracket must be installed, with the open ends of U-shaped slots on both sides facing downwards.
7 Installing the RRU Figure 7-11 Connect to the main mounting bracket for installing a common RRU (1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU Step 4 Install the second RRU onto the main bracket, as shown in Figure 7-12.
7 Installing the RRU Figure 7-13 Securing the captive screw into the connection hole Step 5 Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 7-14. Figure 7-14 Installing the sheet metal tab (1) Screw Issue () (2) Sheet metal tab 1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the handle of the second RRU and remove the screw. 2.
7 Installing the RRU 3. Insert the removed screw into the hole on the top of the first RRU and use an M6 torque screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.). ----End 7.2.3 Installing Three or More RRUs This section describes the procedure and precautions for installing three or more RRUs on a pole. Prerequisites The hoist clamp on the main bracket is secured properly. NOTICE l Do not stand an RRU upright because the RF ports cannot support the weight of the RRU.
7 Installing the RRU Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracket and pole installation brackets on the second set of mounting brackets, and remove the main bracket, as shown in Figure 7-16. Figure 7-16 Removing the RRU main bracket (1) Main bracket (2) Pole installation bracket Step 3 Install the third main bracket and install the third RRU onto the third main bracket.
7 Installing the RRU Figure 7-17 Installing the third RRU onto the third main bracket NOTE The main mounting bracket for installing a blade RRU can connect to the main mounting bracket for installing a common RRU in the scenarios of adding RRUs, as shown in Figure 7-18.
7 Installing the RRU Figure 7-19 Installing the sheet metal tab (1) Screw (2) Sheet metal tab 1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the handle of the first RRU and remove the screw. 2. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to the handle of the first RRU. Then, rotate the sheet metal tab to align the vacant hole in the sheet metal tab with a hole on the top of the third RRU. 3.
7 Installing the RRU Figure 7-20 Installing the second set of RRU mounting brackets Step 6 Install the fourth RRU onto the fourth main bracket, use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-21.
7 Installing the RRU ----End 7.3 Installing an RRU on U-steel This section describes the procedure and precautions for installing an RRU on U-steel. An RRU can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows only one RRU to be installed in standard mode. Prerequisites Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.
7 Installing the RRU Figure 7-22 Top view of an RRU (1) U-steel Procedure Step 1 Determine a position for installing the mounting brackets. Issue () l If the RRU is installed on a tower, determine a position for installing the mounting brackets according to the instructions in 3.5.1 Clearance for a Single RRU. l If the RRU is installed on the ground, determine a position for installing the mounting brackets according to the instructions in Figure 7-23.
7 Installing the RRU Figure 7-23 Distance between the mounting brackets and the ground NOTE As shown in the figure above, it is recommended that the mounting kits be installed at a position 1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only the 3.5 Installation Clearance Requirements of an RRU needs to be provided. Step 2 Install the RRU mounting brackets, as shown in Figure 7-24.
7 Installing the RRU Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that the mounting brackets are secured onto the U-steel, as shown in Figure 7-25. NOTICE Tighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliary brackets are secured properly, measure the spacing between the brackets on both sides and ensure that the spacing is the same on the two sides.
7 Installing the RRU Figure 7-26 Installing the attachment plate onto the rear of the RRU Step 5 Install the RRU onto the main bracket, as shown in Figure 7-27. Figure 7-27 Installing the RRU onto the main bracket Step 6 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-28.
7 Installing the RRU Figure 7-28 Securing the captive screw into the connection hole ----End 7.4 Installing an RRU on Angle Steel This section describes the procedure and precautions for installing an RRU on angle steel. An RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel allows only one RRU to be installed in standard mode. Prerequisites Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets are hoisted onto the tower.
7 Installing the RRU Figure 7-29 Top view of an RRU (1) Angle steel Procedure Step 1 Determine a position for installing the mounting brackets. l If the RRU is installed on angle steel secured on a tower, determine a position for installing the mounting brackets according to the instructions in 3.5.1 Clearance for a Single RRU. l If the RRU is installed on angle steel secured on the ground, determine a position for installing the mounting brackets according to Figure 7-30.
7 Installing the RRU Step 2 Install the RRU mounting brackets, as shown in Figure 7-31. Figure 7-31 Installing the RRU mounting brackets NOTE Ensure that the arrows on the mounting brackets are pointing up. 1. Adjust the position of the nut and remove the square-neck bolt at the open end from the slot on the auxiliary bracket. 2. Slide the mounting brackets onto the angle steel horizontally and insert the square-neck bolt into the slot. Step 3 Use a 16 mm (0.67 in.
7 Installing the RRU Figure 7-32 Securing the RRU mounting brackets Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to 5 N·m (44.25 lbf·in.), as shown in Figure 7-33. Figure 7-33 Installing the attachment plate onto the rear of the RRU Step 5 Install the RRU onto the main bracket, as shown in Figure 7-34.
7 Installing the RRU Figure 7-34 Installing the RRU onto the main bracket Step 6 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-35. Figure 7-35 Securing the captive screw into the connection hole ----End Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
7 Installing the RRU 7.5 Installing an RRU on a Wall This section describes the procedure and precautions for installing an RRU on a wall. Prerequisites The hoist clamp on the main bracket is secured properly. NOTICE l Do not stand an RRU upright because the RF ports cannot support the weight of the RRU. l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage during the installation.
7 Installing the RRU 1. Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws on the pole installation bracket, and remove the main bracket from the pole installation bracket. 2. Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove the plastic screw cap, nuts, spring washers, flat washers, square-neck bolts, and pole installation bracket from the auxiliary bracket.
7 Installing the RRU Figure 7-38 Drilling holes and inserting expansion anchor bolts (1) M10×80 bolt 1. (2) Nut (3) Spring washer (4) Flat washer (5) Expansion sleeve Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points with the depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner to clear the dust out from inside and around the holes, and measure the distances between holes.
7 Installing the RRU Figure 7-39 Installing the pole installation bracket on the expansion anchor bolts NOTICE Ensure that the arrows on the pole installation bracket are pointing up. Step 5 Install the main bracket onto the pole installation bracket using four M6x16 inner hexagon screws, and use an inner hexagon torque screwdriver to tighten the inner hexagon screws to 5 N·m (44.25 lbf·in.) so that the main bracket and pole installation bracket are firmly secured, as shown in Figure 7-40.
7 Installing the RRU (1) Main bracket (2) Pole installation bracket Step 6 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws to 5 N·m (44.25 lbf·in.), as shown in Figure 7-41. Figure 7-41 Installing the attachment plate onto the rear of the RRU Step 7 Install the RRU onto the main bracket, as shown in Figure 7-42.
7 Installing the RRU Step 8 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-43. Figure 7-43 Securing the captive screw into the connection hole ----End 7.6 Installing an RRU on an IFS06 This section describes the procedure and precautions for installing an RRU on an IFS06.
7 Installing the RRU highest working temperature of the RRU. In this scenario, the IFS06 supports at least three RRUs. The IFS06 supports a maximum of six RRUs when the ambient temperature is higher than or equal to the lowest operating temperature of the RRUs and at least 10°C (50°F) lower than the highest operating temperature of the RRU. NOTE For details about the operating temperature of the RRUs, see section "Technical Specifications of RRUs" in 3900 Series Base Station Technical Description.
7 Installing the RRU Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the pole installation bracket to the IFS06, and then use an M10 torque socket wrench to secure the bolts to 30 N·m (265.52 lbf·in.). NOTICE Ensure that the arrows on the pole installation bracket are pointing up. Install the pole installation bracket, as shown in Figure 7-45.
7 Installing the RRU Figure 7-46 Installing the main bracket (1) Main bracket (2) Pole installation bracket Step 4 Attach the RRU to the main bracket, and then use an inner hexagon screwdriver to tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-47. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
7 Installing the RRU Figure 7-47 Installing the RRU onto the main bracket Step 5 Install the RRUs on the lower level from left to right, as shown in Figure 7-48. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
7 Installing the RRU Figure 7-48 Installing RRUs on the lower level Step 6 Optional: Optional: When the ambient temperature is equal to or higher than the lowest operating temperature of the RRU and at least 10°C (10°F) lower than the highest operating temperature of the RRU, repeat the preceding steps to install the RRUs on the higher level, as shown in Figure 7-49. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
7 Installing the RRU Figure 7-49 Installing RRUs on the higher level ----End Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables 8 Installing RRU Cables About This Chapter This chapter describes the procedure for installing RRU cables. 8.1 Cabling Requirements Cables must be laid out according to the specified cabling requirements to prevent signal interference. 8.2 RRU Cable Connections This section describes RRU cable connections. 8.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. 8.4 RRU Cables This section describes RRU cable connections. 8.
8 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables 8.1 Cabling Requirements Cables must be laid out according to the specified cabling requirements to prevent signal interference. NOTE If a cable listed below is not required, skip the cabling requirements of the cable. General Cabling Requirements Bending radius requirements l The bending radius of a 7/8'' feeder must be greater than 250 mm (9.84 in.), and the bending radius of a 5/4'' feeder must be greater than 380 mm (14.96 in.).
8 Installing RRU Cables l Reserve drip loops for all cables outside the feeder window before routing them into the room. Ensure that the radiuses of the drip loops are greater than or equal to the minimum bending radiuses of the cables. l When routing a cable into the room, ensure that a person is assisting you in the room. l Apply waterproof treatment to the feeder window.
8 Installing RRU Cables Figure 8-1 Exterior of the clips (1) Cable hole for feeders (2) Cable hole for fiber optic cables (3) Cable hole for power cables The following figure shows the cables secured on a cable tray. Figure 8-2 Cables secured on a cable tray (1) 3-hole clip (2) 6-hole clip The following figure shows the cables secured on a tower. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables Figure 8-3 Cables secured on a tower (1) 3-hole clip (2) 6-hole clip Special Cabling Requirements Cabling of power cables Issue () l Power cables must be installed in the position specified in engineering design documents. l If the length of power cables is insufficient, replace the cables rather than adding connectors or soldering joints to lengthen the cables. l Cables can only be laid out under well-planned instructions.
8 Installing RRU Cables l After routing a DC power cable onto the platform on a tower, route it along the shortest path to the rails surrounding the platform, and route it along the inside of the rails. l After routing a DC power cable close to the equipment on a tower, use clips to secure the power cable onto a pole or the rails surrounding the platform. Ensure that there is no excessively long distance between the equipment and the position where the power cable is secured.
8 Installing RRU Cables l At least three people are required for laying out fiber optic cables. The cabling activities of fiber optic cables are allowed only when qualified personnel and communication facilities are available. l The operating temperature of fiber optic cables ranges from -40ºC to +60ºC (-40ºF to +140ºF). If the actual temperature is beyond this range, take protective measures or select another route. l Do not circle and twist cables.
8 Installing RRU Cables Figure 8-6 CPRI fiber optic cables routed in the cabinet (1) Figure 8-7 CPRI fiber optic cables routed in the cabinet (2) Figure 8-8 FE/GE fiber optic cables routed in the cabinet l Issue () After routing a fiber optic cable onto the platform on a tower, route it along the shortest path to the rails surrounding the platform, and route it along the inside of the rails. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables l After routing a fiber optic cable close to the equipment on a tower, use clips to secure the fiber optic cable onto a pole or the rails surrounding the platform. Ensure that there is no excessively long distance between the equipment and the position where the cable is secured. l Coil the excess of the fiber optic cables near the equipment on the tower before securing the cables on the tower. 8.2 RRU Cable Connections This section describes RRU cable connections.
8 Installing RRU Cables Figure 8-10 Cable connections of a multimode RRU (1) RRU PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable (4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber (7) RRU alarm cable - - Figure 8-11 shows the cable connections of multiple single-mode RRUs. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables Figure 8-11 Cable connections of multiple single-mode RRUs (1) RRU PGND cable (2) RRU RF jumper (3) RRU power cable (4) CPRI optical fiber - - Figure 8-12 shows the cable connections of multiple multimode RRUs. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables Figure 8-12 Cable connections of multiple multimode RRUs 8.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. Figure 8-13 shows the procedure for installing RRU cables. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables Figure 8-13 Procedure for installing RRU cables 8.4 RRU Cables This section describes RRU cable connections. Table 8-1 lists RRU cables. Table 8-1 RRU cables Cable RRU PGND Cable Issue () One End The Other End Connector Installation Position Connector Installation Position OT terminal (M6, 16 mm2 or 0.025 in.2) Ground terminal on the RRU OT terminal (M8, 16 mm2 or 0.025 in.
8 Installing RRU Cables Cable One End The Other End Connector Installation Position Connector Installation Position RRU Power Cable Tool-less female connector (pressfit type) NEG(-) and RTN(+) ports on the RRU Depending on the power supply equipment External power equipment RRU Alarm Cable DB15 male connector EXT_ALM port on the RRU Cord end terminal External alarm device CPRI Fiber Optic Cable DLC connector CPRI0 port on the RRU DLC connector CPRI port on a board in the BBU RRU RF Ju
8 Installing RRU Cables Procedure Step 1 According to the actual cable route, cut the PGND cable into a proper length to prepare an RRU PGND cable. Then, add an OT terminal at each end of the cable according to the instructions in Assembling the OT Terminal and the Power Cable. Step 2 Install the RRU PGND cable. Connect the M6 OT terminal of the RRU PGND cable to a ground terminal at the RRU bottom and the M8 OT terminal to the external ground bar, as shown in Figure 8-14.
8 Installing RRU Cables Figure 8-15 Correct position of an OT terminal Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label. ----End 8.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Procedure Step 1 Connect the 4.3-10 straight male connector on the RRU RF jumper to the antenna port, and use a torque wrench to tighten the connector to 5 N·m (44.25 lbf·in.), as shown in Figure 8-16.
8 Installing RRU Cables NOTICE On AC-powered electric railways, such as high-speed railways, when leaky cables are connected to RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRU RF jumpers and the leaky cables to protect the RRUs against damage. Step 2 Connect the other end of the RF jumper to the external antenna system. Step 3 Waterproof the connectors of the RF jumper by referring to Figure 8-17.
8 Installing RRU Cables up, then from top down, and finally from bottom up. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly. 2. Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18 in.) away below the bottom of the waterproof tape to the top of the connector, first from bottom up, then from top down, and finally from bottom up. Cut off the redundant tape after three layers are wrapped.
8 Installing RRU Cables 3. Wrap three layers of PVC insulation tape. Wrap each connector with three layers of waterproof tape, from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Cut off the redundant tape after three layers are wrapped. Wrap each layer of tape around the connector tightly. 4. Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.
8 Installing RRU Cables Figure 8-19 Installing an RRU AISG multi-wire cable l Issue () 3. Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB9 connector to 0.4 N·m (3.54 lbf·in.). 4. Connect the other end of the cable to the standard AISG male connector on the RCU. 5. Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable ties to bind the cables. 6.
8 Installing RRU Cables Figure 8-20 Installing an RRU AISG multi-wire cable 3. Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB9 connector to 0.4 N·m (3.54 lbf·in.). 4. Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in Figure 8-21. Figure 8-21 Installing an RRU AISG extension cable Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables 5. Route the cables according to the instructions in 8.1 Cabling Requirements and then use cable ties to bind the cables. 6. Label the installed cables according to the instructions in Attaching an L-Shaped Label. ----End 8.8 Installing an RRU Alarm Cable This section describes the procedure for installing an RRU alarm cable. Procedure Step 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALM port and remove the dustproof cap.
8 Installing RRU Cables Step 4 Connect the eight cord end terminals at the other end to external alarm devices. NOTE l Remove insulated protective tubes from the cord end terminals before connecting the cord end terminals to devices, as shown in Figure 8-23. l Use insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper position based on the onsite situations. This prevents false alarm reporting and equipment damage due to contact of exposed cables.
8 Installing RRU Cables 8.9 Opening the Cover Plate of an RRU Cabling Cavity This section describes the procedure for opening the cover plate of an RRU cabling cavity. Procedure Step 1 Wear ESD gloves. NOTICE Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components.
8 Installing RRU Cables Figure 8-26 RRU cabling cavity (1) Cover plate of the cabling cavity (2) Cabling cavity (3) Label for preparing the power cable (4) Cable clip (5) Power cable trough (6) Waterproof block (7) Optical cable trough - - Step 3 Remove the waterproof block. NOTE Remove only the waterproof blocks for the cables to be installed. ----End 8.10 Installing a CPRI Optical Cable This section describes the procedure for installing a CPRI optical cable.
8 Installing RRU Cables NOTICE The optical modules to be installed must match CPRI rates. Context l A CPRI optical cable transmits CPRI signals between a BBU and an RRU. Procedure Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on the RRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shown in Figure 8-27.
8 Installing RRU Cables Figure 8-28 Installing a CPRI optical cable NOTICE To avoid any damage to optical cables, the cables connected to the RRU must be installed according to the installation process. For details about the installation process, see 8.3 Installing RRU Cables. Step 3 Connect the end labeled 2A and 2B of the optical cable to the optical module on the BBU side. Step 4 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable ties to bind the cables.
8 Installing RRU Cables l A connector or OT terminals are added to the RRU power cable on the power device side. For details, see DBS3900 Installation Guide. Context If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 20 A to 30 A. Table 8-2 describes the RRU power cable.
8 Installing RRU Cables Figure 8-29 Installing an RRU power cable NOTICE Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Step 2 Connect the connector at the other end of the RRU power cable to the corresponding position on the power device. NOTE l A DCDU-11B/DCDU-12B can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.
8 Installing RRU Cables 8.12 Closing the Cover Plate of an RRU Cabling Cavity This section describes the procedure for closing the cover plate of an RRU cabling cavity. Procedure Step 1 Fasten the cables using clips, as shown in Figure 8-30. NOTICE Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Figure 8-30 Fastening cables using clips Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure 8-31.
8 Installing RRU Cables Figure 8-31 Correct placement of waterproof blocks Step 3 Push the handle to close the cover plate on the cabling cavity and use an M4 torque screwdriver to rotate the locking screw on the cover plate on the cabling cavity 90 degrees to ensure that the cover plate is locked, as shown in Figure 8-32. NOTICE The RRU cabling cavity must be securely tightened to prevent water. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
8 Installing RRU Cables Figure 8-32 Closing the cover plate of an RRU cabling cavity Step 4 Take off the ESD gloves, and pack up all the tools. ----End Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
9 Checking the RRU Hardware Installation 9 Checking the RRU Hardware Installation After an RRU is installed, check the hardware installation. Table 9-1 provides the checklist for the RRU hardware installation. Table 9-1 Checklist for the RRU hardware installation Issue () SN Item 1 The position for each device conforms to the engineering drawing and meets the space requirement. Sufficient space is reserved for equipment maintenance. 2 The RRU is securely installed.
10 Powering On an RRU 10 Powering On an RRU After all the devices are installed, check the power-on status of an RRU. NOTICE After you unpack an RRU, you must power on it within 24 hours. If you power off the RRU for maintenance, you must restore power to the RRU within 24 hours. Figure 10-1 shows the RRU power-on check process. NOTE For details about how to power on an RRU, see Powering On an RRU. For details about how to power off an RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide.
10 Powering On an RRU Figure 10-1 RRU power-on check process (a) The normal input voltage of an RRU is -48 V DC. The voltage of the external power supply should range from -36 V DC to -57 V DC. (b) The RUN indicator on the RRU is on for 1s and off for 1s. The ALM indicator is steady off. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
11 Appendix 11 Appendix About This Chapter 11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side This section describes the procedure for adding a tool-less female connector (pressfit type) to the RRU power cable on the RRU side. Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
11 Appendix 11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side This section describes the procedure for adding a tool-less female connector (pressfit type) to the RRU power cable on the RRU side. Context Figure 11-1 shows the cable diagram on labels. Figure 11-1 Cable diagram on labels (1) Cable diagram on labels NOTICE Prepare a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side by strictly following the following operations.
11 Appendix Figure 11-2 Determining the length of the power cable Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 11-3. Figure 11-3 Stripping the specified length of sheath Step 3 Strip a specified length of sheath off each core wire. The length must be consistent with the length of the notch in the tool-less female connector (pressfit type), as shown in Figure 11-4.
11 Appendix Figure 11-6 Tightening screws 2. Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wire labeled RTN(+) to the + port on the tool-less female connector (pressfit type), and then tighten the screws using a Phillips screwdriver, and then use a torque screwdriver to tighten the M4 screws to 1.4 N·m (12.39 lbf·in.), as shown in Figure 11-7. DANGER Do not reversely connect the positive and negative poles.
11 Appendix Figure 11-8 Stripping the sheath off the power cable NOTICE Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm (0.059 [in.]), as shown in Figure 11-9. Figure 11-9 Inserting core wires into the tool-less female connector (pressfit type) ----End Issue () Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
