Dc Power Supply - Arista 7000 Series Quick Start Manual

Connecting Power Cables
4.1.2

DC Power Supply

The DC power supply connects to a circuit that provides 40-72 VDC and 13.9–7.72 A.
displays the DC power supply with the terminal cover in place (left illustration) and with the terminal
cover removed (right illustration).
Figure 4-2: DC Power Supply – terminal cover in place (left); terminal cover removed (right)
Ensure the wires connecting the DC power supply to the power source meet the following:
• DC Input Wire Size: AWG 14 (2.0 mm
• Safety Ground Wire Size: AWG 14 (2.0 mm
• Wire Terminal (Lug): ring or spade, 14-16 AWG, #8 (4 mm) screw
• Overcurrent protection: 20 A.
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.
To connect a DC power supply to power source:
Step 1 Remove the terminal cover to expose the connectors on the right side of the module
(Figure
Step 2 Attach the appropriate lugs to the source DC wires.
Use DC cables with either insulated crimp-on spade lugs or insulated crimp-on ring
connectors.
Important! Wire size must comply with local and national requirements and electrical codes. Use only copper wire.
Step 3 Connect the DC-input wires to the terminal block in this order:
1. Ground cable to the ground connector on the terminal block.
2. Negative (–) source DC cable to the negative (–) connector on the terminal block.
3. Positive (+) source DC cable to the positive (+) connector on the terminal block.
Important! Apply the ground connection first during installation and remove last when removing power.
Step 4 Replace the terminal cover.
16
4-2).
2
) or larger as appropriate
2
) or larger as appropriate
Quick Start Guide: 7000 Series 1 RU-Gen 2 Data Center Switches
Cabling the Switch
Figure 4-2