RRU3261 Installation Guide Issue Draft A Date 2015-07-24 HUAWEI TECHNOLOGIES CO., LTD.
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.
RRU3261 Installation Guide About This Document About This Document Purpose This document describes the process of installing a DC blade RRU3261 (referred to as RRU in this document). Product Version The following table lists the product version related to this document. Product Name Solution Version Product Version DBS3900 l SRAN9.0 V100R009C00 l eRAN7.0 l SRAN10.1 and later versions V100R010C10 and later versions l eRAN8.
RRU3261 Installation Guide About This Document Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements. 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. 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU.
RRU3261 Installation Guide About This Document Symbol Description Calls attention to important information, best practices and tips. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. General Conventions The general conventions that may be found in this document are defined as follows. Convention Description Times New Roman Normal paragraphs are in Times New Roman.
RRU3261 Installation Guide About This Document The GUI conventions that may be found in this document are defined as follows. Convention Description Boldface Buttons, menus, parameters, tabs, window, and dialog titles are in boldface. For example, click OK. > Multi-level menus are in boldface and separated by the ">" signs. For example, choose File > Create > Folder. Keyboard Operations The keyboard operations that may be found in this document are defined as follows.
RRU3261 Installation Guide Contents Contents About This Document.....................................................................................................................ii 1 Changes in the RRU3261 Installation Guide...........................................................................1 2 Installation Preparations..............................................................................................................2 2.1 Reference Documents............................................
RRU3261 Installation Guide Contents 7.10 Installing a CPRI Optical Cable.................................................................................................................................55 7.11 Installing an RRU Power Cable..................................................................................................................................57 7.12 Closing the Cover Plate of an RRU Cabling Cavity......................................................................................
RRU3261 Installation Guide 1 1 Changes in the RRU3261 Installation Guide Changes in the RRU3261 Installation Guide This chapter describes the changes in the RRU3261 Installation Guide. Draft A (2015-07-24) This is a draft. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 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.
RRU3261 Installation Guide 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 RRU3261 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.
RRU3261 Installation Guide 2 Installation Preparations Utility knife Cable cutter Adjustable wrench (size ≥ 32 mm [1.26 in.]) Torque wrench Size: 18 mm (0.71 in.) and 32 mm (1.26 in.) Combination wrench Size: 18 mm (0.71 in.) and 32 mm (1.26 in.) Torque screwdriver Level Torque socket 5 mm 5 mm (M3 to M6) (M3 to M6) Multimeter Marker (diameter ≤ 10 mm [0.39 in.
RRU3261 Installation Guide 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: l The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods.
RRU3261 Installation Guide 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.
RRU3261 Installation Guide 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 You can obtain the RRU frequency band and power supply information from the configuration label on the cover plate and obtain the RRU name from the nameplate on the side of RRU that accommodates the conversion bracket.
RRU3261 Installation Guide 3 Information About the Installation NOTE The actual label and nameplate may differ from what is shown in the figure. Figure 3-3 Positions of the label and nameplate (1) Configuration label (2) Nameplate (3) Frequency band (4) Power supply module (5) Module name - 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 3-4 shows the ports on the RRU panels.
RRU3261 Installation Guide 3 Information About the Installation Figure 3-4 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels.
RRU3261 Installation Guide 3 Information About the Installation Item (3) Indicator Silkscreen Remarks CPRI0 Optical/electrical port 0, connected to the BBU CPRI1 Optical/electrical port 1, connected to the BBU RUN For details, see 3.3 RRU Indicators. ALM ACT VSWR CPRI0 CPRI1 NOTE l The port for transmitting RET signals is determined by the software. l Connect the CPRI0 port to the BBU by default in the single-mode scenario. 3.3 RRU Indicators This section describes six indicators on an RRU.
RRU3261 Installation Guide 3 Information About the Installation Indicator ACT VSWR CPRI0 CPRI1 Issue Draft A (2015-07-24) Color Green Red Red and green Red and green Status Meaning Blinking (on for 1s and off for 1s) Alarms are generated. The alarms may be caused by faults on the related board or ports. Therefore, you need to locate the fault before deciding whether to replace the module. Steady off No alarms are generated.
RRU3261 Installation Guide 3 Information About the Installation NOTE VSWR indicators on RRUs providing one or more than two TX channels have two types of status: l Steady off: No VSWR alarm is generated. l Steady on: VSWR alarms are generated on one or more ports. 3.4 Installation Options This section describes RRU installation options. RRU installation supports the centralized mode. Figure 3-5 shows the diameter of a pole for installing an RRU.
RRU3261 Installation Guide 3 Information About the Installation Figure 3-6 Two RRUs installed in centralized mode Figure 3-7 shows three RRUs installed in centralized mode. Figure 3-7 Three RRUs installed in centralized mode Figure 3-8 shows four RRUs installed in centralized mode. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 3 Information About the Installation Figure 3-8 Four RRUs installed in centralized mode NOTE For details about how to install RRUs on an IFS06, see DBS3900 (ICR) Installation Guide. 3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of multiple RRUs and the requirements for the installation spacing between RRUs. 3.5.
RRU3261 Installation Guide 3 Information About the Installation Figure 3-9 Recommended installation clearance for multiple RRUs installed in centralized mode Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-10 shows the minimum installation clearance for multiple RRUs installed in centralized mode.
RRU3261 Installation Guide 3 Information About the Installation 3.5.2 Installation Spacing Between RRUs This section describes the horizontal and vertical spacing between RRUs. Figure 3-11 shows the recommended horizontal spacing between RRUs. Figure 3-11 Recommended horizontal spacing between RRUs Figure 3-12 shows the recommended vertical spacing between RRUs.
RRU3261 Installation Guide 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.
RRU3261 Installation Guide 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.
RRU3261 Installation Guide 5 Installation Process 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. Figure 5-1 shows the process of installing an RRU. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 5 Installation Process Figure 5-1 Process of installing an RRU Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU 6 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. 6.1 Mounting Kits for an RRU This section describes the mounting kits for an RRU in centralized mode. 6.2 Installing the RRU on a Pole This section describes the procedure for installing the RRU on a pole in centralized mode. 6.
RRU3261 Installation Guide 6 Installing the RRU 6.1 Mounting Kits for an RRU This section describes the mounting kits for an RRU in centralized mode. Figure 6-1 shows the mounting kits for an RRU in centralized mode. Figure 6-1 Mounting kits for an RRU (1) Bracket assembly (2) Backplane (3) L plate 6.2 Installing the RRU on a Pole This section describes the procedure for installing the RRU on a pole in centralized mode.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-2 Securing the upper mounting bracket on the pole Step 2 Install screws on the backplane, and secure the backplane to the RRU by tightening the screws to 5 N·m (44.25 lbf·in.), as shown in Figure 6-3. Figure 6-3 Securing the backplane to the RRU NOTICE The installing method in Figure 6-4 is incorrect. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-4 Incorrect installing method Step 3 Install the RRU on the upper mounting bracket, and tighten the screws on the bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-5.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-6 Securing the lower mounting bracket Step 5 Install the backplane on the second RRU, similar to step2. Step 6 Install the second RRU on the upper mounting bracket on the pole, and tighten the screws on the bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.),as shown in Figure 6-7.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-8 Installing the backplane and L plate on the lower mounting bracket NOTE Install the third RRU and the RRU on the other side of the pole the same way as the second RRU. The tightening torque is similar to that for the first RRU. ----End 6.3 Installing the RRU on a Tower This section describes the procedure for installing the RRU on a tower in centralized mode. Procedure Step 1 Hoist the RRU onto a tower. 1.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-9 Installing upper and lower mounting brackets and binding the pole (1) Traction sling 2. (2) Lifting sling Install the backplane on the RRU, and bind the RRU using a lifting sling and traction sling, as shown in Figure 6-10. Figure 6-10 Installing the backplane and binding the RRU (1) Handle Issue Draft A (2015-07-24) (2) Lifting sling (3) Traction eye Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU NOTICE l The handle has a capacity of bearing at least four times the weight of the RRU. l The binding methods in Figure 6-11 and Figure 6-12 are incorrect. Figure 6-11 Incorrect binding method (1) Figure 6-12 Incorrect binding method (2) 3. Hoist the pole onto the tower, as shown in Figure 6-13. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-13 Hoisting the pole onto the tower (1) Traction sling 4. (2) Lifting sling (3) Fixed pulley Hoist the RRU onto the tower, as shown in Figure 6-14. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-14 Hoisting the RRU onto the tower (1) Lifting sling (2) Fixed pulley (3) Traction sling Step 2 Install the RRU on the tower. 1. Align the backplane with the holes on the upper mounting bracket, install screws on the holes, and secure the backplane to the upper mounting bracket by tightening the screws, as shown in Figure 6-15. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 6 Installing the RRU Figure 6-15 Installing the RRU on the pole 2. Install the backplane and the L plate on the lower mounting bracket, as shown in Figure 6-16. Figure 6-16 Installing the backplane and the L plate on the lower mounting bracket ----End Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 7 Installing RRU Cables 7 Installing RRU Cables About This Chapter This chapter describes the procedure for installing RRU cables. 7.1 Cabling Requirements Cables must be laid out according to the specified cabling requirements to prevent signal interference. 7.2 RRU Cable Connections This section describes RRU cable connections. 7.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. 7.
RRU3261 Installation Guide 7 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 7 Installing RRU Cables 7.1 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.).
RRU3261 Installation Guide 7 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.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-1 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 7-2 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 Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-3 Cables secured on a tower (1) 3-hole clip (2) 6-hole clip Special Cabling Requirements Cabling of power cables 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.
RRU3261 Installation Guide 7 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.
RRU3261 Installation Guide 7 Installing RRU Cables 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. l Do not bind a fiber optic cable at the position where it bends. l Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the fiber optic cables away from sharp objects.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-7 CPRI fiber optic cables routed in the cabinet (2) Figure 7-8 FE/GE fiber optic cables routed in the cabinet l 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.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-9 Cable connections of a single 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 7-10 shows the cable connections of multiple RRUs. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-10 Cable connections of multiple RRUs (1) RRU PGND cable (2) RRU RF jumper (3) RRU power cable (4) CPRI optical fiber - - 7.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. Figure 7-11 shows the procedure for installing RRU cables. Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-11 Procedure for installing RRU cables 7.4 RRU Cables This section describes RRU cable connections. Table 7-1 lists RRU cables. Table 7-1 RRU cables Cable RRU PGND Cable Issue Draft A (2015-07-24) 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.
RRU3261 Installation Guide 7 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
RRU3261 Installation Guide 7 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.
RRU3261 Installation Guide 7 Installing RRU Cables Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label. ----End 7.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Procedure Step 1 Connect the DIN male connector at one end of the RRU RF jumper to the ANT port on the RRU, and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure 7-14.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-15 Waterproofing a connector of the RF jumper (1) Waterproof tape (2) PVC insulation tape NOTE l Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its original length. l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape. l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps more than 50% of the preceding layer.
RRU3261 Installation Guide 7 Installing RRU Cables NOTICE Do not remove dustproof caps from vacant antenna connectors. Figure 7-16 Waterproofing a dustproof cap (1) Dustproof cap (2) Waterproof tape (3) PVC insulation tape NOTE l Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its original length. l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.
RRU3261 Installation Guide 7 Installing RRU Cables Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching the Color Ring. ----End 7.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable This section describes the procedures for installing an RRU AISG multi-wire cable and AISG extension cable. Context When the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4 ft.
RRU3261 Installation Guide 7 Installing RRU Cables l 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 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.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-19 Installing an RRU AISG extension cable 5. Route the cables according to the instructions in 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 7.8 Installing an RRU Alarm Cable This section describes the procedure for installing an RRU alarm cable.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-20 Installing an RRU alarm cable NOTE Install the waterproof DB15 male connector on the RRU alarm cable with caution, preventing the pin assignment from being damaged. Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15 male connector to 0.4 N·m (3.54 lbf·in.). Step 4 Connect the eight cord end terminals at the other end to external alarm devices.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-21 Removing insulated protective tubes from the cord end terminals Figure 7-22 Method for handling cord end terminals that are not in use Step 5 Route the cables according to the instructions in Cabling Requirements, and then use cable ties to bind the cables. Step 6 Label the installed cables according to the instructions in Attaching an L-Shaped Label. ----End 7.
RRU3261 Installation Guide 7 Installing RRU Cables NOTICE Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Use an M5 Phillips screwdriver to loosen the three screws on the cover plate of the RRU cabling cavity, and open the cover plate, as shown in Figure 7-23.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-24 Opening clips Step 4 Remove the waterproof block. NOTE Remove only the waterproof blocks for the cables to be installed. ----End 7.10 Installing a CPRI Optical Cable This section describes the procedure for installing a CPRI optical cable.
RRU3261 Installation Guide 7 Installing RRU Cables 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 7-25.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-26 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 7.3 Installing RRU Cables. Step 3 Connect the end labeled 2A and 2B of the optical cable to the optical module on the BBU side.
RRU3261 Installation Guide 7 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 7-2 describes the RRU power cable.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-27 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.
RRU3261 Installation Guide 7 Installing RRU Cables Procedure Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.), as shown in Figure 7-28. NOTICE Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Figure 7-28 Closing clips Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure 7-29.
RRU3261 Installation Guide 7 Installing RRU Cables Figure 7-29 Correct placement of waterproof blocks Step 3 Close the cover plate of the RRU cabling cavity. Use an M5 torque screwdriver to partially tighten the screws on the cover plate in the sequence shown in Figure 7-30. Then tighten the screws to 2 N·m (17.7 lbf·in.) in the same sequence. NOTICE The RRU cabling cavity must be securely tightened to prevent water.
RRU3261 Installation Guide 7 Installing RRU Cables Step 4 Take off the ESD gloves, and pack up all the tools. ----End Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 8 8 Checking the RRU Hardware Installation Checking the RRU Hardware Installation Table 8-1 provides the checklist for the RRU hardware installation. Table 8-1 Checklist for the RRU hardware installation 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. 3 The cover plate is securely installed on the RRU cabling cavity.
RRU3261 Installation Guide 9 Powering On an RRU 9 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 9-1 shows the RRU power-on check process. NOTE For details about how to power on an RRU, see Powering On an RRU.
RRU3261 Installation Guide 9 Powering On an RRU Figure 9-1 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 Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 10 Appendix 10 Appendix About This Chapter 10.1 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 Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3261 Installation Guide 10 Appendix 10.1 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 10-1 shows the cable diagram on labels.
RRU3261 Installation Guide 10 Appendix Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 10-3. Figure 10-3 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 10-4.
RRU3261 Installation Guide 10 Appendix Figure 10-6 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 10-7. DANGER Do not reversely connect the positive and negative poles.
RRU3261 Installation Guide 10 Appendix Figure 10-8 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 10-9. Figure 10-9 Inserting core wires into the tool-less female connector (pressfit type) ----End Issue Draft A (2015-07-24) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
