Optical Ila Dc Power Supply Description - Juniper PTX3000 Hardware Manual

Figure 14: AC Power Supply in an Optical ILA
1 Power cord retainer
—
2 Handle
—
Each of the 150-W power supplies has a single AC input. The power supply provides 12-VDC output with
a standby voltage of 12 VDC. An optical ILA has twice the number of power supplies needed to power all
of the components in the device, which is known as 1+1 redundancy. When the optical ILA has both power
supplies installed and connected to power, the device has full power redundancy. If a power supply fails
or is removed, another power supply balances the electrical load without interruption.
The fans in the power supply provide front-to-back airflow, which is also known as airflow out (AFO).
CAUTION:
Power to an Optical ILA" on page
on page
NOTE: For more information about power system redundancy, see
Redundancy" on page

Optical ILA DC Power Supply Description

The DC power supplies in the optical ILA (see
field-replaceable units (FRUs) that you can install without powering off the optical ILA or disrupting the
functioning of the optical ILA. The DC version of the optical ILA has two DC power supplies. Both the
power supplies are initially installed at the factory.
To avoid electrical injury, carefully follow instructions in
98, and "Removing an AC Power Supply from an Optical ILA" on page
20.
Figure 15 on page
3 Power plug connector
—
4 Ejector lever
—
63, "Installing an AC Power Supply in an Optical ILA"
33) are hot-removable and hot-insertable
"Connecting AC
96.
"Optical ILA Component
32