Regulatory Model Numbers

This appendix lists the Regulatory Model Numbers (RMNs), where applicable, for the product models for the switches described in this document.

Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model Number (RMN) Product Number(s)
AN1504 DCS-7280SR-48C6
AN1506 DCS-7280TR-48C6
AN1508 DCS-7280QR-C36
AN1604 DCS-7280QRA-C36S
AN1608 DCS-7280TRA-48C6
AN1615 DCS-7280SR2A-48YC6
AN1623 DCS-7280SRAM-48C6
AN1701 DCS-7280SR2K-48C6
AN1626 DCS-7280SRM-40CX2
AN1708 DCS-7280PR3-24, DCS-7280PR3K-24
AN1730 DCS-7280DR3-24, DCS-7280DR3K-24
AN1715 DCS-7280CR3-32P4, DCS-7280CR3K-32P4
AN1731 DCS-7280CR3-32D4, DCS-7280CR3K-32D4
AN1728 DCS-7280SR3-48YC8, DCS-7280SR3K-48YC8
AN1742 DCS-7280CR3-36S, DCS-7280CR3K-36S

Maintenance and Field Replacement

The following topics are covered in this section:

Considerations

Review the following considerations when installing the device.

  • All fans and power supplies are hot swappable.
  • The switch can be running while a power supply is being installed or removed, but the power supply being replaced must not be connected to a power source.
  • All slots must be filled or covered with a blank for operation (even though power supply or fans may not be functional).
  • Before you begin, refer to the Arista Networks document Safety Information and Translated Safety Warnings available at: https://www.arista.com/en/support/product-documentation.
    Note: Descriptions for the removal and replacement of power supplies and fans are for a representative power supply or fan. Locations of status indicator LEDs may differ. Refer to the front and rear panel illustrations of your device to locate the appropriate LED.

Power Supplies

The following steps are required when removing power supplies from a switch.

Note: Only a representative power supply module is shown in Figure 1. For the location of the power supply on your switch, refer to Rear Panel.

Removing a Power Supply

  1. Ground yourself with an ESD wrist strap.
  2. Power down the power supply to be removed by disconnecting the AC power cable.
  3. Push the power supply release lever and remove the power supply Figure 1.
Figure 1. Removing and Installing Power Supply

1 Release lever
2 Remove PSU

Installing a Power Supply

You must make space for installing the power supply by removing an existing one Removing a Power Supply.

  1. Remove the replacement power supply from its packaging.
  2. Slide the new power supply into the empty slot.
  3. Slide the new power supply into the switch until the power supply is fully seated and the release lever snaps into place Figure 1.
  4. Connect the power cord to the power supply.
  5. Verify the LEDs on the power supply.
    Note: The Power Supply status LED should be a steady green for normal operation.
  6. Verify the new power supply operation by issuing the show environment power command. 
    switch#show environment power

  7. The output of the command will list the power supplies in operation and should include the one you replaced.

Fan Modules

Note: Hot swap fans within 30 seconds to prevent the switch from overheating. Ensure that the module you are replacing matches those already installed in the switch.

Removing a Fan Module

The following steps are required when removing or replacing fans from a switch.

Note: Only a representative fan module is shown in Figure 2. For the location of the fan modules on your switch, refer to Rear Panel.
  1. Ground yourself with an ESD wrist strap.
  2. Push the fan module release lever and slide the fan module out of the switch.
Figure 2. Removing Fan Module

1 Release lever

Installing a Fan Module

You must make space for installing the fan module by removing an existing one.

  1. Remove the replacement fan from its packaging.
  2. Slide the new fan module into the switch until the module is fully seated and the release lever snaps into place (Figure 3).
    Figure 3. Inserting Fan Module

  3. Verify that the fan module is working normally.
    Note: The fan module status LED should be a steady green for normal operation.

Rear Panel

All switches covered by this guide use one of the rear panels shown below. Depending on the installed power supply module, the appearance could be different from those shown.

Note: All devices are designed to fit into a 19” rack. The appearance may be different than those shown based on PSU and the modules used.
Note: Handle color indicates airflow direction.
Figure 1. Rear Panel for Models with Management Ports in the Front

1 Power supply 1 4 Fan module 3
2 Fan module 1 5 Fan module 4
3 Fan module 2 6 Power supply 2

 

Figure 2. Rear Panel for Models with Management Ports in the Rear

1 Power supply module 1 6 Fan module 3 11 Fan module 3 status LED
2 System status LED 7 Fan module 4 12 Fan module 2 status LED
3 Ethernet management port 8 Power supply module 2 13 Fan module 1 status LED
4 Fan module 1 9 Earth grounding pad 14 Console serial port
5 Fan module 2 10 Fan module 4 status LED 15 USB port

 

Figure 3. Rear Panel for Models with Management Ports in the Rear and Dual-fan Modules

1 Power supply module 1 5 Fan module 1 status LED 9 Fan module 3 status LED
2 Power supply module 1 status LED 6 Fan module 2 release 10 Power supply module 2
3 Management ports 7 Fan module 2 status LED 11 Power supply module 2 status LED
4 Fan module 1 release 8 Fan module 3 release 12 Fan module bezel1

1. Bezel color indicates airflow direction.

Front Panel

This appendix displays the front panel of all switches covered by this guide.

Note: All devices are designed to fit into a 19” rack. The appearance may be different than those shown based on PSU and fan modules used.
Figure 1. DCS-7280SE-64

 
1 Console port (serial) 4 Power supply 1 status LED 7 Ethernet Management port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan status LE 6 USB port    

 

Figure 2. DCS-7280SE-68

 
1 Console port (serial) 4 Power supply 1 status LED 7 Ethernet Management port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan status LED 6 USB port    

 

Figure 3. DCS-7280SE-72

 
1 Console port (serial) 4 Power supply 1 status LED 7 Ethernet Management port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan status LED 6 USB port    

 

Figure 4. DCS-7280QR-C36

 
1 Console port (serial) 4 Power supply 1 status LED 7 Ethernet Management port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan status LED 6 USB port    

 

Figure 5. DCS-7280TR-48C6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 6. DCS-7280SR2A-48YC6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 7. DCS-7280TRA-48C6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 8. DCS-7280QRA-C36S

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 9. DCS-7280SRAM-48C6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 10. DCS-7280SR-48C6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 11. DCS-7280SR2-48YC6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 12. DCS-7280SRA-48C6

 
1 System status LED 3 Power supply 1 status LED 5 USB port
2 Fan status LED 4 Power supply 2 status LED 6 Port numbers

 

Figure 13. DCS-7280SR2K-48C6

 
1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED    

 

Figure 14. DCS-7280SRM-40CX2

 
1 Ethernet Management port 4 Power supply 1 status LED 7 Console port (serial)
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan status LED 6 USB port    

 

Figure 15. DCS-7280CR3-32D4 and DCS-7280CR3K-32D4

 
1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 16. DCS-7280CR3-32P4 and DCS-7280CR3K-32P4

 
1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 17. DCS-7280DR3-24 and DCS-7280DR3K-24

 
1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 18. DCS-7280PR3-24 and DCS-7280PR3K-24

 
1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 19. DCS-7280SR3-48YC8 and DCS-7280SR3K-48YC8

 
1 Port numbers 3 Fan status LED 5 Power supply 2 status LED
2 System status LED 4 Power supply 1 status LED 6 Port status LED (port 25)

Parts List

This appendix lists the installation parts contained in the switch accessory kit.

Each switch provides an accessory kit that contains parts that are required to install the switch.

The following topics are covered in this section:

Rack Mount Parts

Describes the rack mounting parts and cables requied for installation of the device.

Two-Post Rack Mount Parts

Lists the parts required for a two-post and four-post mounting system.

Figure 1. Two-Post Rack Mounting Brackets
1 Two-post rack mount parts

Four-Post Rack Mount Parts

Lists the parts required for a two-post and four-post mounting system.

Figure 2. Four-Post Rack Mount Parts

1 Rail-slide
2 Rail-rod
3 Rack plugs (detail)
4 Rail (assembled)

Cables

Lists the cables required for installation of the device.
Quantity Description
2 Power cables: IEC-320/C13-C14, 13 A, 250 V
1 RJ-45 Patch Panel Cable
1 RJ-45 to DB9 Adapter Cable
Warning: All provided power cables are for use only with Arista products.

 


Ground Extender Kit (Optional)

Lists the cables required for installation of the device.
SKU Description
KIT-GND-EXT-1RU1 Ground extender kit for NEBS compliance
1. Available only for certain devices.

Status Indicators

The following topics are covered in this section:

Front Indicators

Reviews the Switch and Port Indicators of the device.

Switch Indicators

Front panel LEDs are located on the right side of the chassis and display system, fan, and power supply status.

The front panel LEDs are labeled either as in Figure 1 or as in Figure 2. Check your device for the specific method utilized.

Figure 1. System Status Indicators


1 System status LED 3 Power supply 1 status LED
2 Fan status LED 4 Power supply 2 status LED
Figure 2. System Status Indicators

1 System status LED 3 Power supply 1 status LED
2 Fan status LED 4 Power supply 2 status LED
Table 1. Switch Indicators LED States (Front)
LED Name LED State Device Status
System Status LED Blinking Green System is powering up.
Green Normal operations. Due to power supply and fan redundancy, this LED will remain green if a single fan or power supply is missing or in a failed state.
Blue The locater function is active.
Amber Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
Fan Status LED Green All fan and power modules are operating normally.
Amber Single fan module is removed or malfunctioning. It is also amber when a PSU is completely removed or has a stuck fan rotor.
Red Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
PSU [1:2] Status LED Green PSU is functioning and fully operational. AC is present, Aux output is ON, and Main output is ON.
Off PSU has been removed or is not operating properly due to AC cord being unplugged, its fan rotor being stuck, or an internal fault.

Port Indicators

Port LEDs, located in the vicinity of their corresponding ports, provide link and operational status.

the following figure displays the Port LED location on the DCS-7050QX-32S switch.

Figure 3. Port LEDs

1 Port 4 LEDs 3 Port 2 LEDs
2 Port 3 LEDs 4 Port 1 LEDs

Table 2 provides status conditions that correspond to port LED states. Port LED behavior for QSFP+ and SFP+ ports is consistent.

Table 2. Port LED States (Front)
LED State Status
Off Port link is down.
Green Port link is up.
Yellow Port is software disabled.
Flashing Yellow Port failed diagnostics.

Rear Status Indicators

Fan and power supply modules are accessed from the rear panel.

Each fan and power supply module contains an LED that reports the module status.

Fan Status LEDs are on the fan modules, as displayed in Figure 4.

Figure 4. Fan Status LED

1 Fan module status LED

Table 3 provides status conditions that correspond to fan status LED states.

Table 3. Fan Status LED States (Rear)
LED State Status
Off The fan module is not detected. If it is inserted, it may not be seated properly.
Green The fan is operating normally. This LED state is exclusive to its fan module, and independent of the states of its neighboring fans and power supplies.
Red The fan has failed.

The AC Power Supply Status LEDs are on the power supply modules, as displayed in Figure 5.

Figure 5. AC Power Supply Status LED

1 Power supply status LED

Table 4 provides status conditions that correspond to the AC power supply status LED states.

Table 4. AC Power Supply Status LED States (Rear)
Power Supply State PWR-500AC-F PWR-500AC-R PWR-745AC-F PWR-745AC-R PWR-747AC-F PWR-747AC-R
Input power present Normal operation Green Green Green
Input power present Power Supply fault Yellow Yellow Yellow
No Input power Supply installed in chassis Off Off Off
Input power present Supply not installed in chassis Green Green Green

The DC Power Supply Status LEDs are on the power supply modules, as displayed in Figure 6.

Figure 6. DC Power Supply Status LED

Table 5 provides status conditions that correspond to the DC power supply status LED states.

Table 5. DC Power Supply Status LED States (Rear)
Power Supply State PWR-500DC-F PWR-500DC-R PWR-1900DC
Input power present Normal operation Green Green
Input power present Power Supply fault Blinking Yellow Blinking Yellow
No Input power Supply installed in chassis Off Off
Input power present Supply not installed in chassis Blinking Yellow Blinking Yellow
Note: You can narrow down the error condition by logging in to the switch to view the specific device state. Refer to the Arista User Manual’s Switch Environment Control chapter, under the topic Viewing Environment Status, for further information on the show environment commands.

Configuring the Switch

Arista switches ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the switch without user intervention by downloading a startup configuration file or a boot script from a location specified by a DHCP server.

To manually configure a switch, ZTP is bypassed. The initial configuration provides one username (admin) accessible only through the console port because it has no password.

When bypassing ZTP, initial switch access requires logging in as admin, with no password, through the console port. Then you can configure an admin password and other password protected usernames.

This manual configuration procedure cancels ZTP mode, logs into the switch, assigns a password to admin, assigns an IP address to the management port, and defines a default route to a network gateway.

As the switch boots without a startup-config file, it displays the following through the console: 
The device is in Zero Touch Provisioning mode and is attempting to
download the startup-config from a remote system. The device will not
be fully functional until either a valid startup-config is downloaded
from a remote system or Zero Touch Provisioning is cancelled. To cancel
Zero Touch Provisioning, login as admin and type 'zerotouch cancel'
at the CLI.
localhost login:
  1. Provide power to the switch (Cabling the Switch).
  2. Connect the console port to a PC (Connecting Serial and Management Cables).
  3. Log into the switch by typing admin at the login prompt. 
    localhost login:admin
  4. Cancel ZTP mode by typing zerotouch cancel. IMPORTANT: This step initiates a switch reboot. 
    localhost>zerotouch cancel
  5. After the switch boots, log into the switch again by typing admin at the login prompt. 
    Arista EOS
localhost login:admin
Last login: Fri Mar 15 13:17:13 on console
  6. Enter global configuration mode 
    localhost>enable
localhost#config
  7. Assign a password to the admin username with the username secret command. 
    localhost(config)#username admin secret pxq123
  8. Configure a default route to the network gateway. 
    localhost(config)#ip route 0.0.0.0/0 192.0.2.1
  9. Assign an IP address (192.0.2.8/24 in this example) to an Ethernet management port. 
    localhost(config)#interface management 1localhost(config-if-Ma1/1)#ip address 192.0.2.8/24
  10. Save the configuration by typing write memory or copy running-config startup-config. 
    localhost#copy running-config startup-config

    When the management port IP address is configured, use this command to access the switch from a host, using the address configured in step 9.

    ssh admin@192.0.2.8

    Refer to the Arista Networks User Manual for complete switch configuration information.

Cabling the Switch

The following topics are covered in this section:
Note: Arista fixed switches take approximately 5 to 10 minutes to boot completely.

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground.

Figure 1 displays the location of the grounding pads located on the bottom corners of the rear panel for the models that have no management ports on the rear panel. Figure 2 displays the location of the grounding pads on the rear panel for models that have management ports on the rear panel. There are threaded holes under the sticker on the right (next to PS2) that warns about “1 min”.Figure 3 displays the location of the grounding assembly on the rear panel for DCS-7280CR3-32P4.

 

Important: Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and national installation requirements. Commercially available 6 AWG wire is recommended for installations in the US.

 

À la terre et de mise à la terre fils cosses (M4 x 0.7) ne sont pas fournis. Calibre des fils doit satisfaire des exigences de l’installation locale et nationale. Disponible dans le commerce 6 fils AWG est recommandé pour les installations aux États-Unis.

Figure 1. Earth Grounding Pad Sockets for Models without Management Ports on the Rear Panel

 
1 Earth grounding pads
Figure 2. Earth Grounding Pad Sockets for Models with Management Ports on the Rear Panel

1 Earth grounding pads
Figure 3. Earth Grounding Adapter for DCS-7280CR3-32P4

Grounding Adapter Assembly (KIT-GND-EXT-1RU)

The following steps assemble and attach a grounding assembly to the chassis before mounting it into the rack.

The following switches support the external grounding kit. Identify the location for attaching the adapter. As shown in the following example, the attachment point is on the bottom of the chassis in some cases.

 

Table 1. Grounding Kit Adapter Support
Switch Grounding Kit Adapter
7280PR3-24 KIT-GND-EXT-1RU
7280PR3K-24 KIT-GND-EXT-1RU
7280DR3-24 KIT-GND-EXT-1RU
7280DR3K-24 KIT-GND-EXT-1RU
7280CR3-32P4 KIT-GND-EXT-1RU
7280CR3K-32P4 KIT-GND-EXT-1RU
7280CR3MK-32P4 KIT-GND-EXT-1RU
7280DR3-32P4 KIT-GND-EXT-1RU
7280DR3K-32P4 KIT-GND-EXT-1RU

Figure 4 shows the exploded and assembled views.

Figure 4. Earth Grounding Adapter Assembly for DCS-7280CR3-32P4
  1. Identify all the components to be assembled:

    Note: The chassis is shown upside down in the figure above.
    • 1x Grounding adapter
      • 1x Grounding bracket
        • 2x Flat-head screws (Phillips,M4 x 5.00 long, stainless steel)
        • 2x Hex nuts (#10-32, Serrated Flange, stainless steel)
        • 1x Grounding lug (Copper, 2-hole, 6 AWG, straight barrel)
  2. Insert the grounding adapter through the holes in the grounding bracket.
  3. Insert the ground lug on to the grounding adapter studs and fasten using the hex nuts to form the grounding assembly.
  4. With the chassis on its top on a flat surface, attach the grounding assembly to the chassis using the flat head screws.
  5. Turn the chassis over before mounting it into a rack and connecting cables.

Connecting Power Cables

Power cords are optional and must be ordered separately. You must use an approved power cord compliant with local and national electrical codes or order one from Arista for use with the device.

Important: Installation of this equipment must comply with local and national electrical codes. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

 

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

The switch operates with two installed power supplies. At least one power supply must connect to a power source. Two circuits provide redundancy protection. Rear Panel displays the location of the power supplies on the rear panel of the switch.

Important: Read all installation instructions before connecting the system to the power source.

 

Lire toutes les instructions d’installation avant de brancher le système à la source d’alimentation.
  • Non-Redundant Configuration: Connect power to either of the two power supplies.
  • Redundant Power Supply Configuration: Connect power to both power supplies.
  • Power down the Switch: Remove all power cords and wires from the power supplies.
    Important: This equipment must be grounded. Never defeat the ground conductor.

     

    Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

    Important: This unit requires overcurrent protection.

     

    Cet appareil requiert une protection contre les surintensités.

AC Power Supplies

The following AC power supplies are supported.

PWR-500AC PWR-745AC PWR-1011-AC
PWR-511-AC PWR-747AC PWR-1511-AC

Figure 5 displays an AC power supply, including the power socket on the left side of the module. The AC power supply connects to a circuit that provides the required power, as specified by Table 4.

Note: Several PSUs support both forward and reverse airflow directions.
Figure 5. AC Power Supply Example

The power supplies require power cables that comply with IEC-320 and have a C14 connector. The accessory kit provides two IEC-320 C13 to C14 power cables.

DC Power Supplies

The following DC power supplies are supported.

Note: Several PSUs support both forward and reverse airflow directions.
PWR-500-DC PWR-1900-DC PWR-1511-DC
PWR-511-DC PWR-1011-DC  

The following image displays examples of DC power supplies.

Figure 6. DC Power Supply Examples

Important: A disconnect device must be provided as part of the installation .

 

Un dispositif de sectionnement doit être fourni dans le cadre de l'installation.

Important: Ensure power is removed from DC circuits before performing any installation actions. Locate the disconnect device, circuit breakers or fuses on DC power lines servicing the circuits. Turn off the power line circuits or remove the fuses.

 

Pouvoir assurer qu'il est retiré de circuits DC avant d'effectuer des actions d'installation . Localiser les disjoncteurs ou des fusibles sur les lignes de courant continu desservant les circuits. Coupez les circuits de lignes d'alimentation ou retirer les fusibles.

Important: Wire size must comply with local and national requirements and electrical codes. Use only copper wire.

 

Le calibre du fil doit être conforme aux exigences locales et nationales et les codes électriques. Utiliser du fil de cuivre.

Important: Apply ground connection to the switch first during installation and remove last when removing power.

 

Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la dernière alimentation lors du débranchement.

Wire and Lug Preparation

Before performing any installation actions, ensure power is removed from DC circuits by turning off the power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.

Note: Stranded copper wiring is required and should meet local and national installation requirements. Wires and grounding lugs are not supplied.
  1. Attach an ESD grounding strap.
  2. Prepare the stranded copper wiring for the power supply to be used. Table 4 provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
    Table 2. Wiring, Lug, and Tightening Torques for DC PSUs
    PSU Wire Size(1) Lug Type(2) Tightening Torque
    (AWG) (mm2) N•m in.•lbs.
    PWR-500-DC 14 or larger 2.0 or larger ring or spade/fork 1.0 9
    PWR-511-DC 12 - 14 4.0 - 2.5   1.0 9
    PWR-1900-DC 4 - 6 21.2 - 13.3   2.7 24
    PWR-1011-DC 6 - 8 16.0 - 10.0   2.7 24
    PWR-1511-DC 4 - 6 25.0 - 16.0   2.7 24
  1. Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires.
  2. Unless otherwise noted, twin #10 studs spaced for dual-hole lug with 5/8" hole spacing.
  3. Strip the wires to the appropriate length for the lugs to be used.
  4. Use agency-approved compression (pressure) lugs for wiring terminations.
  5. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
  6. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lugs and the insulation on the wires (Lug Preparation).
  7. Shrink the tubing with a heat gun.
Figure 7. Lug Preparation
 
1 Insulated wire 3 Lug B 1/2”
2 Heat-shrink tubing A 1/4” C 5/8”
Note: Dimension B is the width of the lug (not visible on the right angle lug).

Connecting a DC Power Supply to Power Source

Figure 8 displays an example of connecting a PSU. To connect a DC power supply to a power source, perform the following:

  1. Prepare the stranded wiring (Wire and Lug Preparation).
  2. Attach the appropriate lugs to the source DC wires.
  3. Connect the DC-input wires to the appropriate terminals using the specified torque (Table 4) in the following order.
    Note: Remove terminal covers as needed.
    1. Ground wire to the Protective Earth (PE ) terminal.
    2. Negative source DC cable to the negative (- / -48V) terminal.
    3. Positive (+) source DC cable to the positive (+ / Rtn) terminal.
  4. Replace the terminal covers as required.
    Figure 8. DC PSU Connection Example

Connecting Serial and Management Cables

The accessory kit includes the following cables:
  • RJ-45 to DB-9 serial adapter cable.
  • RJ-45 Ethernet cable.

Table 3 lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 3. RJ-45 to DB-9 Connections

RJ-45

DB-9

  

RJ-45

DB-9
RTS 1 8 CTS   GND 5 5 GND
DTR 2 6 DSR   RXD 6 3 TXD
TXD 3 2 RXD   DSR 7 4 DTR
GND 4 5 GND   CTS 8 7 RTS
Note: RJ-45 to DB-9 connections: For models with a console management port on the rear panel, RJ-45 pin 1 (RTS) is connected to RJ-45 pin 8 (CTS); RJ-45 pin 2 (DTR) and RJ-45 pin 7 (DSR) are not electrically connected to any signal.

For most models, the front panel contains the console, management, and USB ports. The front panel ports display the ports on the front panel of the DCS-7050QX-32S switch. The rear panel ports display the ports on rear panel of the DCS-7280SR-48C6 switch. The front panel and rear panel display all switches covered by this guide.

Figure 9. Front Panel Ports

 
1 USB port 3 Console serial port
2 Ethernet management port    
Figure 10. Rear Panel Ports

 
1 System status LED 3 Activity status LED 5 USB port
2 Ethernet management port 4 Console serial port 6 Link status LED
Connect the front or rear panel ports as follows:
  • Console (Serial) Port: Connect to a PC with the RJ-45 to DB-9 serial adapter cable. The switch uses the following default settings:
    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits
  • Ethernet Management Port: Connect to 10/100/1000 management network with RJ-45 Ethernet cable.
  • USB Port: The USB port may be used for software or configuration updates.
    CAUTION: Excessive bending can damage interface cables, especially optical cables.

    Flexion excessive peut endommager les câbles d’interface, notamment des câbles optiques.

Rack Mounting the Switch

The following topics are covered in this section:
Note: Four-post rack mount is recommended for all switches. Use the rack-mount parts included with your switch for mounting.
Important: The rack mounting procedure is identical for all switches covered by this guide. Illustrations in this chapter depict the mounting of a DCS-7050QX-32S switch.

Les procédure de montage du bâti est identique pour tous les commutateurs visés par ce guide. Illustrations dans ce chapitre montrent le montage d’un interrupteur de DCS-7050QX-32S.

After completing the instructions for your rack type, proceed to Cabling the Switch.

Two-Post Rack Mount

To mount the switch onto a two-post rack, assemble the mounting brackets to the chassis, then attach the brackets to the rack posts. Two-post accessory kits include the following two-post mounting parts.

2 Three-hole Mounting Brackets

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

Important: Attachment pins must engage all three upper bracket holes.

Goupilles de fixation doivent être bloquer tous les trois trous de la bride supérieure.

Attaching Mounting Brackets to the Chassis (Two-Post)

The following figure displays the front bracket alignment for attaching the switch into a two-post rack.

Figure 1. Bracket Mount Examples for Two-Post Rack Mount
Note: Center mount is recommended, especially for heavier switches.

The following figure displays improper bracket mounts for two-post rack mount.

Figure 2. Improper Bracket Mount Examples for Two-Post Rack Mount

The following procedure attaches the two-post rack mount brackets to the chassis.

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.

The following figure shows the correct bracket attachment for a front mount.

Figure 3. Attaching the Mounting Brackets to the Switch Chassis

1 Step 1 4 Bracket clip (attached)
2 Step 2 5 Bracket clip (aligned)
3 Step 3    

To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

Inserting the Switch into the Rack (Two-Post)

This procedure attaches the switch to the rack.

  1. Lift the chassis into the rack. Position the flanges against the rack posts.
  2. Select mounting screws that fit your equipment rack.
  3. Attach the bracket flanges to the rack posts.
    Figure 4. Inserting the Switch into the Rack

    After completing the two-post rack mount, proceed to Cabling the Switch.

Four-Post Rack Mount

The switch is mounted onto a four-post rack by assembling two rails onto the rear posts, sliding the switch onto the rails, then securing the switch to the front posts.

The installation kit provides the following four-post mounting parts:
  • 2 six-hole mounting brackets
  • 2 rail-rods
  • 2 rail-slides

The rail-rods and rail-slides assemble into two identical slide-rails.

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

Important: Attachment pins must engage at least five of the six bracket holes.

Goupilles de fixation doivent être lock au moins cinq des trous du six support.

The following figure displays proper bracket mount configuration examples for four-post mounting.

Figure 5. Bracket Mount Examples for Four-Post Rack Mount

The following figure displays an improper bracket mount configuration example.

Figure 6. Improper Bracket Mount Example for Four-Post Rack Mount

Attaching Mounting Brackets to the Chassis (Four-Post)

The following figure displays the front bracket alignment for mounting the switch into a four-post rack.
Figure 7. Attaching the Mounting Brackets to the Switch Chassis

This procedure attaches mounting brackets to the switch chassis as depicted by the preceding figure.

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.

To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

Assembling the Rails onto the Equipment Rack

Rail-rods and rail-slides assemble into two identical rails. Each rail connects a front post to a rear post. When the rails are installed, the switch slides on the rails into the rack. Each bracket includes a screw that attaches the switch to the rail.

Each end of an assembled rail contains two rack plugs (Figure 8). The rails are installed into a rack by inserting the plugs into rack slots. When installing rails into posts with threaded or rounded holes, remove all plugs located on both sides of the assembled rails, then install the rails with bolts that fit the rack.

Figure 8. Attaching the Four-Post Mounting Brackets to the Switch Chassis

1 Step 1 4 Bracket clip (attached)
2 Step 2 5 Bracket clip (aligned)
3 Step 3    

This procedure attaches the rails to a four post rack:

  1. Slide a rail-rod into a rail-slide (Figure 9) until the rail clip makes an audible click.

    The rail clip prevents the extension of the rail beyond the maximum supported distance between the front and rear rack posts.

    Figure 9. Assembling the Rails

    1 Rail-slide 4 Rail (assembled)
    2 Rail-rod    
    3 Rack plugs    
  2. Attach rail to the right rear rack post by inserting rod-end rack plugs into post slots (Figure 10). The slide assembly must be inside the right posts, relative to the left rack posts.

    If the rack plugs were previously removed, use bolts to attach the rail to the rack.

  3. Attach the slide end of the rail to the front post by extending the rail end past the post, then contracting the rail while guiding the rack plugs into the post.
  4. Repeat Step 1 through Step 3 for the left posts. Ensure the rails are on the same horizontal level.
    Figure 10. Attaching the Rails

    1 Inset A
    2 Inset B

Attaching the Switch to the Rack

After the rails are installed, the switch slides on the rails into the rack. Each bracket includes a thumb screw that attaches the switch to the rail.

  1. Lift the switch into the rack and insert the mounting brackets into the slide rails.
    Figure 11. Inserting the Switch onto the Rails

  2. Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are flush with the rail flanges attached to the rack posts.
  3. Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with the brackets Figure 12.
    Figure 12. Attaching the Switch to the Rack Posts

    After completing the four-post rack mount, proceed to Cabling the Switch.