Chapter 4: Cabling the Switch
Connecting Power Cables
Quick Start Guide: 7000 Series 1 RU-Gen 3 Data Center Switches
21
Step 3
Connect the DC-input wires:
•
Ground wire to the Protective Earth (PE
) terminal.
•
Negative source DC cable to the negative (- / -48V) terminal.
•
Positive (+) source DC cable to the positive (+ / Rtn) terminal.
•
Tightening Torque: 2.7 N-m (24 in. lbs.)
4.2.4
PWR-500-DC Power Supply
The PWR-500W-DC power supply connects to a circuit that provides -48Vto -60V and 15A.
Figure 4-6
displays the DC power supply.
Figure 4-6: PWR-500-DC Power Supply
Ensure the wires connecting the DC power supply to the power source meet the following:
•
DC Input Wire Size: AWG 14 (2.0 mm
2
) or larger as appropriate
•
Safety Ground Wire Size: AWG 14 (2.0 mm
2
) or larger as appropriate
•
Wire Terminal (Lug): ring or spade/fork, 14-16 AWG, #8 (4 mm) screw
•
Over-current 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.
Assurez-vous de pouvoir retirer des circuits en courant continu avant d’effectuer toute action
d’installation.Localiser les disjoncteurs ou fusibles sur les lignes électriques DC entretien des circuits.
Mettez hors tension le circuit ligne ou retirer les fusibles.
