Ptx1000 Dc Power Supply Description; Figure 19: Ptx1000 Fru Panel; Figure 20: Dc Power Supply In A Ptx1000 - Juniper PTX1000 Hardware Manual

PTX1000 Packet Transport Router Hardware Guide

PTX1000 DC Power Supply Description

38
The DC power supplies in the PTX1000 (see
Figure 20 on page 38) 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

1— Power supplies (4)

Figure 20: DC Power Supply in a PTX1000

1— Status LED
2—Ejector lever
Each of the four 1600-W power supplies has a single DC input. The power supply provides
12-VDC output with a standby voltage of 12 VDC. A PTX1000 provides for twice the
number of power supplies needed to power all of the components in the router, which
is known as 2N redundancy. When the PTX1000 has all four power supplies installed and
connected to power, the router has full power redundancy. If a power supply fails or is
removed, another power supply balances the electrical load without interruption.
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
port-to-FRU airflow.
Figure 19 on page 38 and
2— Fan modules (3)
3— Handle
or a gold-colored handle denotes
AFO
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