ARISTA 720XP Series 1 RU-Gen 3 Cognitive Campus Switches Installation Guide

Cabling the Switch

After mounting the switch into the rack, connect the switch to the data center ground. Figure 4-1 displays the location of the grounding pads located on the left of the rear panel.

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

Figure 4-1: Earth Grounding Pad Sockets

Connecting Power Cables

Note: 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.

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

• 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.
Important! This unit requires overcurrent protection.

AC Power Supplies

The following AC power supplies are supported.
• PWR-621-AC-RED
• PWR-1021-AC-RED

Figure 4-3 displays an AC power supply, including the power connector (C16) on the right side of the module. The AC power supply connects to a circuit that provides the required power, as specified by Table 1-5 on page 3.

Figure 4-2: AC Power Supply (PWR-1021-AC-RED)

1. Power supply status LED
2. Release
3. Handle

The power supplies have a C16 connector and require power cables that comply with IEC-320.

DC Power Supplies

The following DC power supplies are supported.
• PWR-721-DC-RED
Figure 4-3 displays a DC power supply.
Figure 4-3: DC Power Supply (PWR-721-DC-RED)

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

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

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.
Step 1 Attach an ESD grounding strap.
Step 2 Prepare the stranded copper wiring for the power supply to be used. Table 4-1 provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
Table 4-1 Wiring, Lug, and Tightening Torques for DC PSU

for dual-hole lug with
5/8″ hole spacing| 2.7| 24

1. Unless otherwise noted, applies to -48V, Battery return, and Protective earth wires.
Step 3 Strip the wires to the appropriate length for the lugs to be used.
Step 4 Use agency-approved compression (pressure) lugs for wiring terminations.
Step 5 Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
Step 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 (Figure 4-4).

Figure 4-4: Lugs wiring terminations

1. Insulated wire
2. Heat-shrink tubing
3. Lug (all three terminals)
   A 1/4”
   B 1/2”
   C 5/8”

Step 7 Shrink the tubing with a heat gun.

Connecting a DC Power Supply to Power Source
To connect a DC power supply to power source:
Step 1 Prepare the stranded wiring (Wire and Lug Preparation).
Step 2 Attach the appropriate lugs to the source DC wires.
Step 3 Connect the DC-input wires to the appropriate terminals using the specified torque (Table 4-1) in the following order.

Note Remove terminal covers as needed.
a Ground wire to the Protective Earth (PE ) terminal.
b Negative source DC cable to the negative (- / -48V) terminal.
c Positive (+) source DC cable to the positive (+ / Rtn) terminal.

Important! Ensure power is removed from DC circuits before performing any installation actions. Locate circuit breakers or fuses on DC power lines servicing the circuits. Turn off the power line circuits or remove the fuses.
Important! Wire size must comply with local and national requirements and electrical codes. Use only copper wire.
Important! Apply the ground connection first during installation and remove last when removing power.
Step 4 Replace the terminal covers as required.

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 4-2 lists the pin connections of the RJ-45 to DB-9 adapter cable.
Table 4-2 RJ-45 to DB-9 Connections

Note   RJ-45 to DB-9 connections: For the 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.

Figure 4-5 displays management ports on the rear panel of the CCS PoE switches. Appendix C and Appendix D display the front and rear panels of all switches covered by this guide.
Figure 4-5: Rear Panel Management Ports

1. Speed status LED
2. Activity status LED
3. Ethernet management port
4. USB port
5. Serial console port

Connect management 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.

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>