Ruijie RG-S6510 Series Installation and operating manual

RG-S6510 (V2.0) Series Switches
Hardware Installation and Reference Guide

Copyright Statement
Ruijie Networks©2019
Ruijie Networks reserves all copyrights of this document. Any reproduction, excerption, backup, modification,
transmission, translation or commercial use of this document or any portion of this document, in any form or by anymeans,
without the prior written consent of Ruijie Networks is prohibited.
Exemption Statement
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not shoulder any responsibility for losses and damages caused due to content omissions, inaccuracies or errors.

Preface
Thank you for using our switches. This guide will help you install and use the switches.
Scope
This manual describes the functions and physical features of the switches, and presents the installation procedure,
troubleshooting procedure, technical specifications, and specifications and usages rules of cables and connectors. It is
intended for the users that have some experience in installing andmaintaining network hardware and want to learn the
above information. At the same time, it is assumed that the users of this switch are already familiar with the related
terms and concepts of Ethernet.
Document Structure
Chapter 1 "Product Overview" describes the main characteristics, technical specifications, and related modules
of this product.
Chapter 2 "Preparation before Installation" lists the safety, power supply, and site requirements that must be
met before the switch can be installed.
Chapter 3 "Product Installation" describes how to install the integrated switch and modules, and connect its
power cables and grounding lines.
Chapter 4 "System Debugging" describes the commissioning after the switch is powered on for the first time.
Chapter 5 “Monitoring and Maintenance”
Chapter 5 "Troubleshooting" describes possible problems met during the installation and use of the switch and
solutions for such problems.
Appendix A "Connector and Connection Media"
Appendix B "10G, 25G, 40G and 100G Modules"
Appendix C “Lightening Protection”
Appendix D “Cabling Recommendations in Installation”
Appendix E “Site Selection”
Obtaining Technical Assistance
Ruijie Networks Website: https://www.ruijienetworks.com/
Technical Support Website: https://ruijienetworks.com/support
Case Portal: https://caseportal.ruijienetworks.com
Community: https://community.ruijienetworks.com
Technical Support Email: [e-mail]
Skype: [e-mail]
Related Documents
Documents
Description

Configuration Guide
Describes network protocols and related mechanisms that supported by the
product, with configuration examples.
Command Reference
Describes the related configuration commands, including command modes,
parameter descriptions, usage guides, and related examples.
Symbol Conventions
Means reader take note. Notes contain helpful suggestions or references.
Means reader be careful. In this situation, you might do something that could result in equipment damage or loss
of data.

Hardware Installation and Reference Guide Product Overview
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1 Product Overview
RG-S6510 (V2.0) switches are data center oriented high density 10G/25G access switches, providing 25G/100G
access, low latency, and complete data center features. RG-S6510 (V2.0) switches, with up to 48 25G ports and 8
100G ports, can be used with RG-N18000-X/RG-S6500-4C switches to compose a high-performance and
high-reliability data center network.
The RG-S6510 (V2.0) Series Switches:
Model
100G
QSFP28
Ethernet
Port
25G/10G
SFP28
Ethernet
Port
10GBase-T
Ethernet Port
Extension
Module Slot
Redundant
Fan
Redundant
Power Supply
RG-S6510-48VS8CQ
8
48
N/A
N/A
3+1
1+1
An SFP28 port supports 25G/10Gbase-R and does not support 1000base-X.
A QSFP28 port supports both 100G/40G mode and 4x25G/4x10G mode.
Specifications
Model
RG-S6510-48VS8CQ
CPU
Quad-core processer, 1.2GHz
BOOT ROM
16MB
FLASH Memory
8GB
SDRAM
DDR4 4GB (Compatibility: 8GB)
Extension Module
Slot
Unsupported
Extension Module
Unsupported
Fan Slot
4 (support 3+1 redundancy, configure at least 3 fan modules in one switch)
Fan Module
M6510-FAN-F, M6510-FAN-R
Power Supply
Slot
2 (support 1+1 redundancy)
Power Module
RG-PA550I-F, RG-PA550I-R
Power Supply
Input
AC input
Rated voltage range: 100V AC to 240V AC
Maximum voltage range: 90V AC to 264V AC
Frequency: 50 Hz to 60 Hz
Rated current: 3.5Ato 7.2A
High voltage direct current (HVDC) input:
Input voltage range: 192V DC to 288V DC
Input current range: 3.6A
Power
Consumption
Less than 300W
Optical Module
Refer to Appendix B
The supported modules update at any time, contact Ruijie Networks for details.
SFP28 Port
Supported

Hardware Installation and Reference Guide Product Overview
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QSFP28 Port
Supported
FC Port
Unsupported
10GBASE-T Port
Unsupported
Temperature
Warning
Support temperature warning and over-temperature protection.
EMC Standards
GB9254-2008 CLASS A
Safety Standards
GB4943-2011
Working
Temperature
0°C to 45°C (32°F to 113°F)
Storage
Temperature
-40°C to 70°C (-40°F to 158°F)
Working Humidity
10% to 90% RH (non-condensing)
Weight
Net weight: 8 kg (including 4 fan modules and 2 power modules)
Dimensions
(L x W x H)
442 mm x 387 mm x 44 mm, 1RU
RG-S6510-48VS8CQ switch is a class A product. In a domestic environment, this product may cause radio
interference in which case the user may be required to take adequate measures.
The 25G/100G Ethernet port of the RG-S6510-48VS8CQ switch supports DAC. For a detailed model and
specification, refer to Appendix B.
Product Appearance
The hardware of the S6510-48VS8CQ includes the chassis, the power supply system and the heat dissipation system.
The power supply system: Provides two power supply slots, which support 1+1 power supply redundancy. It is
recommended users configure power supply redundancy.
The heat dissipation system: Provides four fan module slots, which support 3+1 fan redundancy. It is
recommended users configure all fans redundancy.
Figure 1-1 Appearance of the RG-S6510-48VS8CQ
Front Panel

Hardware Installation and Reference Guide Product Overview
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Figure 1-2 Front Panel of the S6510-48VS8CQ
Notes:
1. Switch status indicator
2. Switch locator indicator
3. SFP28 port
4. SFP28 port status indicator
5. QSFP28 port
6. QSFP28 port status indicator
The S6510-48VS8CQ supports 100G QSFP28 module and 25G SFP28 module.
Back Panel
Figure 1-3 Back Panel of the S6510-48VS8CQ
Notes:
1. Power supply module slot
2. Fan module slot
3. Locator indicator
4. MGMT port
5. USB 2.0 port
6. Grounding point
7. Asset label
8. Switch status indicator
9. Console port
Asset Management Label
The asset management label is next to the switch status indicator of the switch back panel. The label is movable and
can be withdrawn from the device. Users can mark the information such as asset name, category, code and registration
date on the label which helps to improve asset management accuracy and efficiency.
Figure 1-4 Asset Management Label of the RG-S6510-48VS8CQ

Hardware Installation and Reference Guide Product Overview
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External Ports
The RG-S6510-48VS8CQ provides the following ports:
Universal serial bus (USB) port: This port can connect with USB memory to save logs, host versions, warnings
and other diagnostic messages. Therefore, it is more convenient to upgrade the software version of the switch on
line and save the log information.
To protect the data and avoid device damage, use qualified USB flash disks of good brands. At the same time, the
local USB port is compatible with most of the USB controllers except some USB flash disks.
RG-S6510-48VS8CQ series switches support debugging, configuration, maintenance, management and host
software uploading of Console ports.
Console port: Use RS-232 interface electrical level and standard RJ45 connector. This interface is connected with
the serial port of terminal PC to perform system debugging, configuration, maintenance, management, and host
software uploading.
MGMT port: This is an out-band Ethernet port, which uses standard RJ45 connector. This interface is connected
with Ethernet port of a PC to perform program downloading.
SFP28 port: There are 48 25G SFP28 ports, which support optical modules and DAC copper cables (10GBASE-X
compatible).
QSFP28 port: There are 8 100G QSFP28 ports, which support optical modules and DAC copper cables. These
ports can also work in 4x25G mode.
Indicator
Indicator
Panel
Identification
Status
Meaning
Switch status indicator
(Front panel/Back
panel)
Status
Off
The system is not powered up.
Solid red
1) One of the modules of the system fails.
2) There are less than 3 fans.
3) The internal or partial temperature exceeds the
warning working temperature, and the switching
service resets.
Blinking green.
The system is initializing.
Solid green
The system is operational.

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Solid yellow
1) The temperature gets to the warning threshold.
2) Only 3 fans are in the position.
3) One of the dual powers is not connected with the
AC power cord.
Switch locator indicator
(Front panel/Back
panel)
ID
Off
Device location is disabled.
Solid blue
Device location is enabled.
MGMT port indicator
MGMT
Off
The port is not connected.
Green
The port is connected at 10M/100M/1000Mbps.
Blinking
The port is transmitting or receiving data.
SFP28 port status
indicator
1F-48F
Off
The port is not connected.
Solid green
The port is connected at 10G/25Gbps.
Blinking green
The port is transmitting or receiving data at
10G/25Gbps.
QSFP28 port status
indicator
49F-56F
Off
The port is not connected.
Solid green
The port is connected at 40G/100Gbps.
Blinking green
The port is transmitting or receiving data at
40G/100Gbps.
Power Supply
The RG-S6510-48VS8CQ series switches support power supply the RG-PA550I-F and RG-PA550I-R. The smart power
supply module supports power management, and the host can read input power, input current, and temperature in real
time. The power supply module supports hot swapping.
The RG-S6510-48VS8CQ series switches support 1+1 power supply redundancy. To improve the stability and
reliability of the entire system, it is recommended to configure 1+1 power supply redundancy.When the two power
supply modules work normally, the switch is in the status of current sharing.
It requires at least one power supply module to work normally. Filler panels need to be installed in the unoccupied
power supply module slots to ensure ventilation and heat dissipation and avoid dusts.
Heat Dissipation
The working temperature of the RG-S6510-48VS8CQ switches is 0°C to 45°C, or 32°F to 113°F, and the heat
dissipation design needs to ensure the stability, safety and maintainability in such environment. The
RG-S6510-48VS8CQ series switches adopt fan ventilation and forced convection to ensure the device can work
normally in specified environment. Dust the device every three months to avoid blocking the ventilation openings.
The RG-S6510-48VS8CQ supports M6510-FAN-F and M6510-FAN-R and provides fan speed regulation, fan failure
warning, and fan hot swapping.
Figure 1-5 Ventilation and Heat Dissipation of the RG-S6510-48VS8CQ

Hardware Installation and Reference Guide Product Overview
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Figure 1-6 Ventilation and Heat Dissipation of the RG-S6510-48VS8CQ
Leave sufficient space in the front and at the back of the chassis (at least 20 cm) for ventilation.
It requires at least three fan modules to work normally. Filler panels need to be installed in the unoccupied fan
module slots to ensure ventilation and heat dissipation and avoid dusts.
Power modules and fan modules with different air direction cannot be used together.

Hardware Installation and Reference Guide Preparation before Installation
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2 Preparation before Installation
2.1 Safety Precautions
To avoid body injury and device damage, please carefully read the safety precautions before you install the RG-
S6510 (V2.0).
The following safety precautions do not cover all possible dangers.
2.1.1 Installation Safety
Keep the chassis clean and dust-free.
Do not place the device in walking areas.
Do not wear loose clothes, ornaments or any other things that may be hooked by the chassis during the
installation and maintenance.
Turn off all power supplies and unplug all power cords and cables before the installation or the dismantling.
2.1.2 Removal Safety
Avoid frequent removals after the device is installed.
Turn off all power supplies and unplug all power cords and cables before the installation or the dismantling.
When removing the device, pay attention to the balance and avoid hurting legs and feet or straining the back.
When the device is being removed, do not hold the power supply handle or the fan handle for these parts are not
designed for bearing the entire weight of the device. It will cause damage to the device or to your body if you hold
these parts when removing the device.
To reduce the weight of the chassis during the removal, dismantle the extension module, fan module and the
power supply module first.
Install and operate the device in places where removing is restricted.
2.1.3 Electric Safety
Observe local regulations and specifications when electric operations are performed. Relevant operators must be
qualified.
Carefully check any potential danger in the working area, such as ungrounded power supply, unreliable grounding
of the power supply, and damp/wet ground.
Find out the location of the emergency power supply switch in the room before installation. First cut off the power
supply in the case of an accident.
Be sure to make a careful check before you shut down the power supply.
Do not place the device in a damp location. Do not let any liquid enter the chassis.

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Any nonstandard and inaccurate electrical operation can cause accidents such as fires or electrical attacks, thus
causing severe, or even fatal damages to human bodies and the devices.
Direct or indirect touch through a wet object on high-voltage and mains supply can bring a fatal danger.
2.1.4 Electrostatic Discharge Damage Precautions
The RG-S6510 (V2.0) designing gives a great consideration to prevent electrostatic discharge damage and adopts
multiple measures. But if the electrostatic exceeds certain limit, it can still cause great damages to the circuitry and the
device. In networks connected by the RG-S6510 (V2.0), the major sources of electrostatic induction are outdoor high
voltage transmission cables, lightening, indoor floor materials and the machine structure.
Pay attention to the following tips:
The device and the floor are well grounded.
Take dust prevention measures in the room.
Maintain an appropriate humidity.
When the pluggable modules of the switch are being installed, wear antistatic wrist strap and make sure the
antistatic wrist strap is well grounded.
Do not use bare hand to directly touch the components and the printed-circuit board (PCB) when the boards are
used.
Use an anti-static shielding bag to properly store the board.
Do not let any clothes touch a circuit board. An antistatic wrist strap can only prevent human static electricity from
damaging the circuit board, but cannot prevent any static electricity on clothes.
2.1.5 Laser Safety
Among the modules supported by the RG-S6510 (V2.0), there are a great number of optical modules that are Class I
laser product.
Precautions:
When a fiber transceiver works, ensure that the port has been connected with a fiber or has been covered by a
dust cap so as to keep out dust and prevent it from burning your eyes.
Do not stare at any fiber port.
Do not stare at any fiber port under any circumstances, as this may cause permanent damage to your eyes.
2.2 Installation Site Requirements
Install the RG-S6510 (V2.0) indoor. To ensure normal operation and a prolonged service life of the device, the
installation site must meet the following requirements.
2.2.1 Rack Mounting Requirements
Make sure the cabinet complies with the following conditions if the RG-S6510 (V2.0) is installed in the cabinet:

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Install the switch in an open cabinet as much as possible. If you install the switch inside a closed cabinet, be sure
that the cabinet has a good ventilation and heat dissipation system.
Be sure that the cabinet is firm enough to bear the weight of the RG-S6510 (V2.0) and its installation accessories.
Be sure that the dimensions of the cabinet is appropriate for installation of the RG-S6510 (V2.0) that can reserve a
certain space for the front, back, left and right panels for heat dissipation.
The cabinet should be properly grounded.
2.2.2 Ventilation Requirements
For the RG-S6510 (V2.0) series products, leave sufficient space in the front and at the back of the chassis (at least
20cm) for ventilation. After various cables are connected, bundle the cables or place them in the cable management
bracket to avoid blocking air inlets. Dust the device every three months to avoid blocking the ventilation openings.
2.2.3 Temperature and Humidity Requirements
To ensure the normal operation and a prolonged service life of the RG-S6510 (V2.0), maintain an appropriate
temperature and humidity in the equipment room. The equipment room with too high or too low temperature and
humidity for a long period of timemay damage the equipment.
In an environment with high relative humidity, the insulating material may have bad insulation or even leak
electricity. And sometimes the materials may suffer from mechanical performance change and metallic parts may
get rusted.
On the other hand, in an environment with low relative humidity, the insulating strip may dry and shrink, and static
electricity may occur easily and endanger the circuit on the device.
In an environment with high temperature, the equipment is subjected to even greater harm, as its performance
may degrade significantly and its service life may be shortened at high temperature for long that expedites the
aging process.
Temperature and humidity requirements of the RG-S6510 (V2.0):
Model
Working Temperature
Working Humidity
RG-S6510-48VS8CQ
0ºC to 45ºC / 32ºF to 113ºF
10% to 90%
The ambient temperature and humidity are measured at the point that is 1.5 m above the floor and 0.4 m before
the device when there is no protective plate in front or at the back of the device rack.
2.2.4 Cleanness Requirements
Dust poses the top threat to the running of the device. The indoor dust falling on the device may be adhered by the
static electricity, causing poor contact of themetallic joint. Such electrostatic adherence may occur more easily when
the relative humidity is low, not only affecting the service life of the device, but also causing communication faults. The
following table shows the requirements for the dust content and granularity in the equipment room.
Substance
Concentration Limit (particles/m3)
Dust particles (diameter ≥0.5μm)
≤3.5×106
Dust particles (diameter ≥5μm)
≤3×104

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Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet strict requirements; as such
poisonous substances may accelerate the corrosion of the metal and the aging of some parts. The equipment room
should be protected from the intrusion of harmful gases (for example, SO2, H2S, NO2and Cl2), whose requirements are
listed in the following table.
Gas
Average (mg/m3)
Maximum (mg/m3)
SO2
0.3
1.0
H2S
0.1
0.5
NO2
0.5
1.0
Cl2
0.1
0.3
The Average refers to the average limit of harmful gas in one week. The Maximum value is the upper limit of the
harmful gas in one week, and maximum value can last for up to 30 minutes every day.
2.2.5 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the RG-S6510 (V2.0). It is the key to
prevent lightning stroke and resist interference. Please carefully check the grounding conditions on the installation site
according to the grounding requirements, and perform grounding properly as needed.
Safety Grounding
The device using AC or HVDC power supply must be grounded by using the yellow/green safety grounding cable.
Otherwise, when grounding fault happens in the high voltage circuit inside the device, electric shock may occur.
The building installation shall provide a means for connection to protective earth, and the device is to be
connected to that means.
Lightning Grounding
The lightning protection system of the facility is an independent system that consists of the lightning rod, down lead
conductor and the connector to the grounding system, which usually shares the power reference ground and
yellow/green safety cable ground. The lightning discharge ground is for the facility only, not for the device.
For lightning protection, refer to Appendix C.
EMC Grounding
The ground required for EMC design includes shielding ground, filter ground, noise and interference suppression, and
level reference. All the above constitute the comprehensive grounding requirements. The grounding resistance should
be less than 1Ω. There is one grounding connector at the right bottom of the chassis of RG-S6510 (V2.0) series
switches. The grounding connector is pasted with conspicuous warning labels.
Figure 2-1 EMC grounding

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2.2.6 EMI Consideration
Various interference sources, from either outside or inside the device or application system, affect the system in the
conductive ways such as capacitive coupling, inductive coupling, and electromagnetic radiation. There are two types of
electromagnetic interferences: radiated interference and conducted interference, depending on the type of the
propagation path. When the energy, often RF energy, from a component arrives at a sensitive component via the space,
the energy is known as radiated interference. The interference source can be either a part of the interfered system or a
completely electrically isolated unit. Conducted interference results from the electromagnetic wire or signal cable
connection between the source and the sensor. Interference along the cable the interference is transmitted from one
unit to another. Conducted interference often affects the power supply of the device, but can be controlled by a filter.
Radiated interference may affect any signal path in the device, and is difficult to shield.
Effective measures should be taken for the power system to prevent electric grid interference.
The working ground of the routers should be properly separated and kept as far as possible from the grounding
device of the power device or the anti-lightning grounding device.
Keep the device away from high-power radio transmitter, radar transmitting station, and high-frequency
large-current device.
Measures must be taken to isolate static electricity.
2.3 Precaution for Fiber Connection
Before connecting the fibers, you should ensure that the type of optical connector and the type of fibers match the type
of the optical interface used. Moreover, you should pay attention to the Tx and Rx directions of the fiber. The Tx end of
this device should be connected to the Rx end of the peer device, and the Rx end of this device to the Tx end of the
peer device.
2.4 Installation Tool
Common Tools
Cross screwdrivers, related electric and optical cables, bolts, diagonal pliers, straps
Special-purpose Tools
Anti-static gloves, stripping pliers, crimping pliers, crystal head crimping pliers, wire

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cutters
Fiber optic cleaning Tools
Air-laid paper, fiber end microscope
Meter
Multimeter, errormeter, optic-power meter
RG-S6510 (V2.0) series is not shipped with a tool kit. You need to prepare a tool kit by yourself.
2.5 Unpacking and Checking
Goods Checklist
Chassis Carton
Chassis, Yellow/green grounding cables; Quick installation guide; Packing list, Pouched
documents
Module Carton
Various modules; Packing list; Quick installation guide
A normal delivery should contain the above mentioned items, which may differ from the actual delivery, depending
on purchasecontracts. Please check your goods carefully according to the packing list or purchase contract. If you
have any questions or there are any errors, please contact your distributor.

Hardware Installation and Reference Guide Product Installation
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3 Product Installation
RG-S6510 (V2.0) series Ethernet switch must be used and fixed in the room.
Make sure you have carefully read part 2, and be sure that the requirements set forth in part 2 have been met.
3.1 Installation Procedure
3.2 Installation Verification
Carefully plan and arrange the installation location, networking mode, power supply, and wiring before installation.
Verify the following requirements before installation:
The installation location provides sufficient space for heat dissipation.
The installation location meets the temperature and humidity requirements of the equipment.
The qualified power supply and current required are available at the installation location.
Preparation
Install the cabinet
Mount the device into the cabinet
Ground the system
Insert various modules
Connect external port cables or fibers of various modules
Bind cables or fibers
Installation check
End
Connect the power supply

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The related network cables have already been deployed at the installation location.
3.3 Cabinet Installation
Precautions
When you install the cabinet, pay attention to the following requirements:
All expansion bolts for fastening the cabinet base to the ground should be installed and tightened in sequence
from bottom up (large plain washer, spring washer, and nut), and the installation holes on the base and the
expansion bolts should be well aligned.
After the cabinet is installed, it should be stable and still.
After the cabinet is installed, it should be vertical to the ground.
When multiple cabinets are placed side by side in the room, they should be aligned in a straight line, with an error
less than 5 mm.
The front/back doors of the cabinet should be properly installed. You can open and close them smoothly. The
locks should work normally, and all keys should be complete.
There should be no unnecessary and informal labels inside the cabinet and on various boards.
Blank panels should be installed completely.
Fastening screws of various devices in the cabinet of the same model should be ready and tightened.
Various boards of the equipment should be installed securely, and the fastening screws on the panel should be
tightened.
All wiring inlets at the top and bottom of the cabinet should be installed with rodent-resistant nets with seams no
more than 1.5 cm in diameter, to prevent rodents and other small animals from entering the cabinet.
Antistatic wrist straps should be provided in the cabinet.
Installation Steps
1) Plan the available space before installing the cabinet. You must reserve sufficient space for front and back doors
for maintenance.
2) Mount and fasten the cabinet at the designed location as planned.
3) Install the appropriate chute and cables.
4) Install the tray and wiring layer on the rack according to the configuration of one rack with one cabinet installed or
one rack with multiple cabinets installed.
3.4 Mounting into the Cabinet
Precautions
Before mounting RG-S6510 (V2.0) into the cabinet, first verify that the front and back brackets of the cabinet are at the
right locations. If the bracket is too far forward, the front panel of the equipment may be too close to the front door, so
that the front door cannot be closed when the equipment is connected with network cables and pigtail fibers. Usually,

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you should reserve space of at least 10mm between the front panel of the equipment and that of the cabinet after
installation. Before mounting into a cabinet, you need to make sure the following conditions are met:
Fasten the cabinet.
Insert various modules in the frame properly.
Remove any obstacle in the frame and the surrounding environment.
Prepare the equipment to be installed and move it to the place near the cabinet where you can handle it easily.
Installing Mounting Brackets
1) Take out the two L-shape brackets and eight M4*8FMO countersink screws from the plastic package.
2) Install the brackets at the side panels of the switch, and fix the brackets with four M4*FMO countersink screws at
each side.
Figure 3-1 Installing Mounting Brackets
Mounting the Switch to a Rack
The RG-S6510 (V2.0) series switches are qualified for EIA standard and can be installed in 19-inch wiring cabinet.
During the process of installation, keep the front panel of the switch forward. It is recommended use tray to install the
RG-S6510 (V2.0) series switches and fix the tray on the bracket, or use the rear bracket provided with the switches.
Figure 3-2 Mounting the Switch to a Rack

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The mounting brackets are located at the four of the six screw holes at both sides on the back panel of the host.
Distinguish the left and the right rear brackets according to the marked directions.
The rear brackets provided are only applicable for cabinets with depth of 800mm - 1200mm.
Mounting the Switch to a Workbench
In some cases, users do not have the 19-inch standard cabinet. The common solution is to place the switch on a clean
workbench. The operation is simple as follows:
1) Attach the four rubber pads to the four corners on the switch bottom.
2) Place the switch on the workbench and ensure good ventilation condition around the switch.
Figure 3-3 Mounting the Switch on a Workbench