Arista 7020SR-32C2 Series, Быстрый старт

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1. Attach an ESD grounding strap.
2. Prepare the stranded copper wiring for the power supply to be used.
Table 6: Wiring, Lug, and
Tightening Torques for DC PSUs provides wiring, lug, and tightening torque information for the
power supplies covered in this guide.
Table 6: Wiring, Lug, and Tightening Torques for DC PSUs
Wire Size
(1)
Tightening Torque PSU
(AWG) (mm
2
)
Lug Type
N • m in. • lbs.
PWR-400-DC 10 - 12 6.0 - 4.0 M3.5 - single
hole 1.0 9
1
Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires.
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 ( Figure 13: Lug Preparation (two-hole lug shown) ).
Figure 13: Lug Preparation (two-hole lug shown)
1 Insulated wire 3 Lug B 1/2"
2 Heat-shrink tubing A 1/4" C 5/8"
7. Shrink the tubing with a heat gun.
4.2.2.2 Connecting a DC Power Supply to Power Source
To connect a DC power supply to power source:
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 6: Wiring,
Lug, and Tightening Torques for DC PSUs ) 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.
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