Juniper PTX1000 - PTX1000 DC Power Supply Description

The fan in the power supply provides port-to-FRU airflow, which is also known as airflow out (AFO). A
power supply with the label AFO or a gold-colored handle denotes port-to-FRU airflow.
CAUTION: To avoid electrical injury, carefully follow instructions in “Connecting AC
Power to the PTX1000” on page 82, “Installing a Power Supply in a PTX1000” on
page 103, and “Removing a Power Supply from the PTX1000” on page 101.
NOTE: For more information about power system redundancy, see “PTX1000 Component
Redundancy” on page 21.
PTX1000 DC Power Supply Description
The DC power supplies in the PTX1000 (see Figure 19 on page 41 and Figure 20 on page 42) are
hot-removable and hot-insertable field-replaceable units (FRUs) that you can install without powering off
the router or disrupting the routing function. The PTX1000 has four power supplies.
CAUTION: Do not mix AC and DC power supplies in the same chassis.
Figure 19: PTX1000 FRU Panel
2—1— Fan modules (3)Power supplies (4)
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