Juniper EX8208 Hardware Manual page 58

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Figure 10: AC Power Supply
Each AC power supply comes with a power cord retainer that holds the power cord in place. See
Figure 11 on page 58. The power cord retainer has a clip and an adjustment nut. The L-shaped ends of
the clip hook into the bracket holes on each side of the AC appliance inlet on the faceplate. The adjustment
nut holds the power cord in the correct position. For instructions for installing the power cord retainer,
see "Connecting AC Power to an EX8200 Switch" on page 171.
Figure 11: Power Cord Retainer for an AC Power Supply
Each power supply connects to the backplane in an EX8208 switch and to the midplane in an EX8216
switch. The backplane and the midplane distribute the output power produced by the power supplies to
different switch components. Each AC power supply provides power to all the components in the switch.
Each power supply has its own fan and is cooled by its own internal cooling system. The airflow is from
the front of the power supply to the back. Hot air exhausts from the rear of the chassis.
EX8200 switches support both 2000 W AC power supplies and 3000 W AC power supplies.
The 2000 W AC power supply supports both the low-voltage line (100–120 VAC) and the high-voltage
line (200–240 VAC) AC power configurations. In both cases, the output is 52 VDC. The output power is
1200 W for low-voltage line input and 2000 W for high-voltage line input.