Powering the Modular Switch

Important:

Installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance if necessary.

 

L'installation de cet équipement doit être conforme aux codes électriques locaux et nationaux. Consultez les agences de réglementation et les autorités d'inspection appropriées pour garantir la conformité si nécessaire.

 

 

Note: Arista modular switches take 15 to 30 minutes to boot completely.

 

The switch operates with multiple power supplies. Refer to Table 1 for information regarding your specific system. Table 2, and Table 3 list the quantities of modules each chassis can contain and the minimum operating requirements for each model.

 

Table 1. Power Supply Capacity and Requirements for DCS-7358X4, DCS-7368X4, and DCS-7289R3A Series Modular Switches
Switch Model Chassis Capacity (Power Supply Units) Minimum Operating Requirements (non-redundant power)
DCS-7358X4 4 1 active circuit
DCS-7368X4 4 1 active circuit
DCS-7289R3A(1) 4 1 active circuit

(1): Some configurations could require more than one active circuit.

 

 

Rear Panels displays the location of the power supplies on the switch.

This chapter includes sections that describe the procedure for grounding and cabling power supplies. After completing the instructions for your switch, proceed to Connecting Serial and Management Cables.

 

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: Provide power to the minimum required power inputs.
  • Redundant Power Supply Configuration: Connecting power to modules over minimum requirements protects the switch against failed modules and can provide grid-level redundancy.
  • Power down the Switch: Remove all power cords from the power input sockets.

 

Important:

This equipment must be grounded. Never defeat the ground conductor. This unit requires over-current protection.

 

Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre. Cet appareil nécessite de protection contre les surintensités.

 

Cabling the AC Power Supply

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground. The grounding pads are located on the rear of the switch. It would help if you used a right-angle ground lug to attach the chassis ground wire and route it to the data center ground, as shown in the following figure.

 

Figure 1. Grounding the Switch

 

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 U.S.

 

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 des câbles 6 AWG sont recommandé pour les installations aux États-Unis.

 

After the switch is grounded, ESD wrist straps can be grounded by connecting them to the ESD port on either the rear or the front of the switch, as shown in the following figures.

 

Figure 2. ESD Sockets (Rear)



1 Switch Card Module Release Handle 6 PSU Status LED
2 Fan 7 PSU
3 Fan Release Handle 8 PSU Release Handle
4 Fan Installation Indicator 9 Ground
5 Fan Status LED 10 ESD

 

 

Figure 3. ESD Sockets (Front)

1 Supervisor Module 3 Linecard Ejector Latch
2 Supervisor Ejector Latch 4 ESD

 

Connecting the Power Cables to an AC Power Supply

The following figure displays an AC power supply module, including the power input socket.

 

Figure 4. AC Power Supply

1 Power Supply Status LED

 

The power supplies require power cables that comply with an IEC-320 C19 plug. The accessory kit provides 14 AWG, C19, to C20 power cables.

To insert a power cable:

  1. Pull the retaining clip back on each power input socket.

     

    Note: The retaining clip is optional (if provided).

     

  2. Plug the power cables into the sockets.
  3. Adjust the retaining clips for your power cords (if a retaining clip was provided).
  4. Push the retaining clip back down over the cable (if a retaining clip was provided).
     

DC Power Supplies

The following figure displays a DC power supply module.

Figure 5. DC Power Supply


 

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 installing, remove power 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. The following table 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) (mm 2 ) N • m in. • lbs.
    PWR-1900-DC 4 - 6 21.2 - 13.3 dual-hole 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. Select agency-approved compression (pressure) lugs for wiring terminations.
  5. Slip on heat-shrink tubing on the wire ends before assembling the lugs onto 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. The following figure shows an example lug.

     

    Figure 6. Lug Preparation

    1 Insulated wire A 1/4”
    2 Heat-shrink tubing B 1/2”
    3 Lug C 5/8”
     
  7. Shrink the tubing with a heat gun.
     

Connecting a DC Power Supply to Power Source

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 2) 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 7. DC PSU Connection Example


     

Rack Mounting the Switch

Mount the switch only in a four-post rack. Complete the following tasks to mount the switch.
  • Attach the left and right shelves to the rack, adjusting the length of the shelves as needed. You must allocate 4RU rack space starting from the top of the shelf for switch placement (Shelf Installation).
  • Attach the rack mounting ears to the switch (Mounting Ears Installation).
  • Use a forklift to insert and secure the switch into the rack (Switch Insertion into the Rack).

 

Note: Components are designed for tool-less installation in square-hole racks.

 

Shelf Installation

The four-post mount accessory kit contains these components:
  • The left and right shelves
  • Rack mounting ears

     

Follow the steps below to attach the shelves to the rack.

  1. Extend the sliding end of each shelf so that it can be placed on the rack.

     

    Figure 1. Attaching Shelves to the Rack (Right Shelf Shown)


     

  2. Move the sliding end of each shelf so that the shelf fits snugly and level onto the rack, and secure the shelves using the screws to the rack.

     

    Figure 2. Adjusting Shelves to Fit onto the Rack (Right Shelf Shown)

     

    Note: You must ensure that the shelves are installed at the same level in the rack.

     

    The installed switch shelves are shown in the following figure.

     

    Figure 3. Switch Shelves Installed


     

Mounting Ears Installation

The following figure displays the rack mounting ears, which secure the switch top to the rack. Attach the two rack mounting ears to each side of the switch. The inner side of each ear may include a latch to the locking mechanism that secures the ear to the rack. The two rack mounting ears are identical and will attach to the switch such that the securing screws are on the outside of the switch, as shown.

 

Figure 4. Rack Mounting Ears

Switch Insertion into the Rack

Use a forklift to raise and align the switch with the installed shelves, insert the rollers on the rack, and mount the ears into the shelves' channels. Push and slide the switch into the rack to secure it.

 

Note: The rack mounting ears use only the top two rack units, but you must allocate four rack units from the top of the shelves for the switch.

 

Figure 5. Inserting the Switch


 

Figure 6. Securing the Switch


 

After completing the Four-Post Installation, proceed to Powering the Modular Switch.

Preparation

This section discusses the following topics:

 

Site Selection

Consider the following criteria when selecting a site to install the switch:

Floor Space:Install the switch in an area that provides adequate clearance for removing front and rear components. The following figure displays switch clearance requirements.

 

Figure 1. Switch Component Removal Footprint


 

The following table shows the clearance dimensions for the modular switches.

 

Table 1. Clearance Requirements and Footprint Dimensions
Switch Clearance Requirements Dimensions
A B C
DCS-7358X4 25.4 cm

(10 inches)

 64.0 cm

(25.2 inches)

 55.9 cm

(22.0 inches)
DCS-7368X4 25.4 cm

(10 inches)

 64.0 cm

(25.2 inches)

 55.9 cm

(22.0 inches)
DCS-7289R3A 25.4 cm

(10 inches)

 76.7 cm

(30.2 inches)

 66.0 cm

(26.0 inches)

 

  • Temperature and Ventilation: For proper ventilation, install the switch with ample airflow to the front and back of the switch. The temperature should not go below 0° or exceed 40°C.

     

    Important:

    To prevent the switch from overheating, do not operate it in an area where the ambient temperature exceeds 40°C (104°F).

     

    Pour empêcher l'interrupteur de surchauffe, ne pas utiliser il dans une zone où la température ambiante est supérieure à 40°C (104°F).

     

  • Airflow Orientation: Determine the airflow direction of the fan modules and power supply modules. Fan and power supply module handles indicate airflow direction.

     

    Note: Your switch configuration may not support all power supplies.

     

    The Rear Panels display power supply and fan module locations on the rear panel. Verify the airflow direction of all modules (all rear panel modules have the same color handles).

    Orient the switch to ensure the air intake modules face the cool aisle. Contact your sales representative if the airflow direction is incompatible with the installation site.

     

  • Rack Space: Install the switch in a 19" rack or cabinet. The switch height depends on the switch model, as specified in Table 1. Verify that the removal clearances (Table 1) provide adequate space for the power and data cables that connect to the switch.

    When mounting the switch in a partially filled rack, load the rack from bottom to top, with the heaviest equipment at the bottom. Load the switch at the bottom if it is the only item in the rack.

    The accessory kit provides mounting brackets for four-post racks. Two-post mounting racks are not supported.

     

  • Power Requirements: Power requirements vary by switch. Refer to Table 2, and Table 3 for information regarding your specific system.

    Multiple circuits provide redundancy protection. The switch uses power cables that have an IEC-320 C19 plug. The accessory kit provides IEC-320 C19 to C20 power cables.

     

    Important:

    All power input plug-socket combinations must be accessible at all times; they provide the primary method of disconnecting power from the system.

     

    Toutes les combinaisons de fiche-prise d’entrée de puissance doivent être accessibles en tout temps; ils fournissent le principal moyen de coupure d’alimentation du système.

     

  • Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and foreign objects are not drawn into the ventilation holes. Verify these guidelines are met:
    • Clearance areas to the front and rear panels allow for unrestricted cabling.
    • All front and rear panel indicators can be easily read.
    • AC power cords can reach from the AC power outlet to the connectors on the rear panel.

       

      Important:

      Disconnecting power to all input sockets is required to turn off the unit completely.

       

      La déconnexion de l'alimentation de toutes les prises d'entrée est nécessaire pour éteindre complètement l'appareil.

       

Tools Required for Installation

Each switch provides an accessory kit that contains parts for installing the switch into a four-post rack. Two-post rack mount parts are available through your sales representative. Accessory kits do not include screws, nuts, or bolts for attaching the switch to a conventional rack.

In addition to the accessory kit, the following tools are required to install a modular switch:

All Racks

A mechanical device capable of lifting an installed chassis (the chassis weight is listed in the Table 1).

Four-Post Tool-less Rack

No additional equipment is required.

Four-Post Conventional Rack

  • Screws or rack mounting nuts and bolts.
  • Screwdriver.

Electrostatic Discharge (ESD) Precautions

Observe these guidelines to avoid ESD damage when installing or servicing the switch.
  • Assemble or disassemble equipment only in a static-free work area.
  • Select a conductive work surface (such as an antistatic mat) to dissipate static charge.
  • Wear an ESD wrist strap to dissipate static charge accumulation.
  • Minimize handling of assemblies and components.
  • Keep replacement parts in their original static-free packaging.
  • Remove all plastic, foam, vinyl, paper, and other static-generating materials from the work area.
  • Select tools that do not create ESD.

Overview

This section discusses the following topics:

Scope

This guide is intended for properly trained service personnel and technicians who need to install the following Arista Networks Data Center Switches:
  • DCS-7358X4
  • DCS-7368X4
  • DCS-7289R3A

 

Important:

Only qualified personnel should install, service, or replace this equipment.

 

Seul le personnel qualifié doit installer, service, ou remplacer cet équipement.

 

Receiving and Inspecting the Equipment

Upon receiving the switch, inspect the shipping boxes and record any external damage. Retain packing materials if you suspect that part of the shipment is damaged; the carrier may need to inspect them.

If the boxes were not damaged in transit, unpack them carefully. Ensure you do not discard any accessories in the same box as the main unit.

Inspect the packing list and confirm that you received all listed items. Compare the packing list with your purchase order. The Parts List provides a list of components included with the switch.

Installation Process

Complete the following required tasks to install and use the switch:
  1. Select and prepare the installation site (Site Selection).
  2. Assemble the installation tools listed (Tools Required for Installation).
  3. Attach the mounting brackets and install the switch in an equipment rack (Rack Mounting the Switch).
  4. Connect the switch to the power source and network devices (Powering the Modular Switch and Connecting Serial and Management Cables).
  5. Configure the switch (Configuring the Switch).

     

    Important:

    Class 1 Laser Product: This product has provisions for installing Class 1 laser transceivers that provide optical coupling to the communication network. After a Class 1 laser product is installed, the equipment is a Class 1 Laser Product. The customer is responsible for selecting and installing the Class 1 laser transceiver and for ensuring that the Class 1 AEL (Allowable Emission Limit) per EN/IEC 6-825, CSA E60825-1, and Code of Federal Regulations 21 CFR 1040 are not exceeded after the laser transceiver has been installed. Do not install laser products whose class rating is greater than 1. Refer to all safety instructions that accompany the transceiver before installation. Only Class 1 laser devices certified for use in the country of installation by the cognizant agency are to be utilized in this product.

     

    Produit laser de classe 1: Ce produit est prévu pour l'installation d'émetteurs-récepteurs laser de classe 1 qui assurent un couplage optique au réseau de communication. Une fois qu’un produit laser de classe 1 est installé, l’équipement devient un produit laser de classe 1. Le client est responsable de la sélection et de l'installation de l'émetteur-récepteur laser de classe 1 et de s'assurer que les AEL de classe 1 (limite d'émission admissible) selon EN/IEC 6-825, CSA E60825-1 et Code of Federal Regulators 21 CFR 1040 ne sont pas dépassées. après l'installation de l'émetteur-récepteur laser. N'installez pas de produits laser dont la classe est supérieure à 1. Reportez-vous à toutes les instructions de sécurité qui accompagnent l'émetteur-récepteur avant l'installation. Seuls les appareils laser de classe 1 certifiés pour une utilisation dans le pays d'installation par l'agence compétente doivent être utilisés dans ce produit.

     

    Important:

    Ultimate disposal of this product must be handled in accordance with all national laws and regulations.

     

    L'élimination finale de ce produit doit être effectuée conformément à toutes les lois nationales etrèglements.

     

    The switch card module requires special handling when removing, inserting, or handling the component. The Maintenance and Field Replacement section provides instructions for handing switchcard modules.

Obtaining Technical Assistance

Any customer, partner, reseller, or distributor holding a valid Arista Service Contract can obtain technical support in any of the following ways:

  • Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. This is the easiest way to create a new service request.

    Include a detailed description of the problem and the “show tech-support” output.

     

  • Web: https://www.arista.com/en/support.

    Create a support case through the support portal on our website. You may also download the most current software and documentation and view FAQs, Knowledge Base articles, Security Advisories, and Field Notices.

     

  • Phone: +1 866-476-0000 or +1 408-547-5502.

     

    Important:

    No userserviceable parts inside. Refer all servicing to qualified service personnel.

     

    Aucune pièce réparable par l'utilisateur à l'intérieur. Confiez tous les services à un personnel de service qualifié.

     

Specifications

The following table lists the specifications of Arista Data Center modular switches and components this guide covers.

 

Table 1. Modular Switch Specifications
  DCS-7358X4 DCS-7368X4 DCS-7289R3A
Height 4 RU: 179 mm

(7.0 inches)

 4 RU: 179 mm

(7.0 inches)

 4 RU: 179 mm

(7.0 inches)
Width 442 mm

(17.4 inches)

 442 mm

(17.4 inches)

 442 mm

(17.4 inches)
Depth
Without handles and ejectors 559 mm

(22.0 inches)

 559 mm

(22.0 inches)

 688 mm

(27.1 inches)
With handles and ejectors 640 mm

(25.2 inches)

 640 mm

(25.2 inches)

 767 mm

(30.2 inches)
Weight
Empty 13.6 kg

(30.0 lbs)

 13.6 kg

(30.0 lbs)

 13.6 kg

(30.0 lbs)
Fully Loaded 38.6 kg

(85 lbs)

 38.6 kg

(85 lbs)

 43.5 kg

(96.0 lbs)
AC Power
Input (per circuit) 200 - 240 VAC, 16 A, 50 or 60 Hz 200 - 240 VAC, 16 A, 50 or 60 Hz 200 - 240 VAC, 16 A, 50 or 60 Hz
Branch Circuit Protection (per circuit) 20 A 20 A 20 A
DC Power
Input (per circuit) -40 V to -72V, 44 A (-48V) -40 V to -72V, 44 A (-48V) -40 V to -72V, 44 A (-48V)
Branch Circuit Protection (per circuit) 50 A 50 A 50 A
Input Power Circuits (AC or DC) 2 to 4 2 to 4 2 to 4
Operating Temperature 0° to 40°C

(32° to 104°F)

 0° to 40°C

(32° to 104°F)

 0° to 40°C

(32° to 104°F)
Storage Temperature -40° to 70°C

(-40° to 158°F)

 -40° to 70°C

(-40° to 158°F)

 -40° to 70°C

(-40° to 158°F)
Operating Altitude 0 to 3,000 meters

(0 to 10,000 feet)

 0 to 3,000 meters

(0 to 10,000 feet)

 0 to 3,000 meters

(0 to 10,000 feet)
Relative Humidity 5 to 90% 5 to 90% 5 to 90%

 

 

The following table lists the power specifications of the DCS-7358X4 and DCS-7368X4 modular switch components.

 

Table 2. DCS-7358X4, DCS-7368X4 Modular Switch and Component Power Specifications
Module Type Part Number Power Draw: Typical / Maximum
Supervisor Modules DCS-7368-SUP

DCS-7368-SUP-D

 30 W / 48 W

30 W / 48 W
Linecard Modules

DCS-7368-16C

DCS-7368-4P

DCS-7368-4D

DCS-7368-16S

DCS-7358-16C

63 W(1) / 140 W(2)

72 W(1) / 140 W(2)

72 W(1) / 140 W(2)

36 W(1) / 88 W(2)

83 W(1) / 140 W(2)
Switchcard Module (excluding fans) DCS-7358X4-SC

DCS-7368X4-SC

215 W / 385 W

204 W / 364 W

Fans

  

23 W / 55 W

Power Supplies

PWR-1900-AC

34 W / 57 W

DCS-7358X4 Series System

Full chassis loaded with

1 - DCS-7368-SUP-D supervisor

1 - DCS-7358X4-SC switch card

8 - DCS-7368-16C line cards

5 - Fans

2 - PWR-1900-AC power supplies

821 W(1) / 1547 W(2)
DCS-7368X4 Series System Full chassis loaded with

1 - DCS-7368-SUP-D supervisor

1 - DCS-7368X4-SC switch card

8 - DCS-7358-16C line cards

5 - Fans

2 - PWR-1900-AC power supplies

 810 W(1) / 1528 W(2)

(1): Excluding optics.

(2): With 4.5 W optics.

 

 

The following table lists the power specifications of the DCS-7289R3A modular switch components.

 

Table 3. DCS-7289R3A Modular Switch and Component Power Specifications
Module Type Part Number Power Draw: Typical / Maximum
Supervisor Modules DCS-7289-SUP-D 40 W / 63 W

Linecard Modules

 DCS-7358-16C

DCS-7368-4P

DCS-7368-4D

DCS-7368-16S

DCS-7368-16C

 63 W(1) / 140 W(2)

72 W(1) / 140 W(2)

72 W(1) / 140 W(2)

36 W(1) / 88 W(2)

Switchcard Module (excluding fans)

 DCS-7289R3A-SC

DCS-7289R3AK-SC

DCS-7289R3AM-SC

650 W / 950 W

650 W / 950 W

650 W / 950 W

Fans

  

23 W / 55 W

Power Supplies

PWR-1900-AC

34 W / 57 W

DCS-7289R3A Series System

Full chassis loaded with

1 - DCS-7289-SUP-D supervisor

1 - DCS-7289R3A-SC switch card

9 - DCS-7368-16C-LC line cards

5 - Fans

2 - PWR-1900-AC power supplies

1244 W / 1927 W

(1): Excluding optics.

(2): With 4.5 W optics.

 

 

Note: DCS-7289R3A Modular Switch supports only Front to Rear airflow.

 

Quick Start Guide
7368X Series
Modular Data Center Switch
Arista Networks

www.arista.com

PDOC-00150-02

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