Juniper TCX1000-RDM20, Hardware Manual

Page: 36 / 206

Figure 13: Power Supply Numbering
Each of the 650-W power supplies has a single AC input. The power supply provides
12-VDC output with a standby voltage of 12 VDC. A TCX1000-RDM20 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 TCX1000-RDM20 has both power supplies installed
and connected to power, the device has full power redundancy. If a power supply fails
or is removed, the other power supply provides power for the full load without interruption.
The fan in the power supply provides front-to-back airflow, which is also known as airflow
out (AFO) .
CAUTION: To avoid electrical injury, carefully follow instructions in
“Connecting AC Power to a TCX1000-RDM20” on page 73 , “Installing a Power
Supply in a TCX1000-RDM20” on page 123 , and “Removing a Power Supply
from a TCX1000-RDM20” on page 121 .
NOTE: For more information about power system redundancy, see
“TCX1000-RDM20 Component Redundancy” on page 6 .
Related
Documentation
TCX1000-RDM20 AC Power Cord Specifications on page 51
•
•
TCX1000-RDM20 Power Supply LEDs on page 24
•
TCX1000-RDM20 Field-Replaceable Units on page 115
•
TCX1000-RDM20 AC Power Specifications on page 51
•
Connecting AC Power to a TCX1000-RDM20 on page 73
TCX1000-RDM20 DC Power Supply Description
The DC power supplies in the TCX1000-RDM20 (see Figure 14 on page 23 ) are
hot-removable and hot-insertable field-replaceable units (FRUs) that you can install
without powering off the TCX1000-RDM20 or disrupting the functioning of the
TCX1000-RDM20. The TCX1000-RDM20 has two power supplies. Both the power
supplies are initially installed at the factory.
Copyright © 2019, Juniper Networks, Inc. 22
TCX1000 Programmable ROADM Hardware Guide