Juniper QFX10016, Hardware Manual

Page: 83 / 439

A DC power supply can operate with only one input DC feed connected. The RCB only enables the
components for which sufficient power is available.
QFX10000-PWR-DC power supplies can use the standard bus or the enhanced bus.
Each QFX10000-PWR-DC 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.
QFX10000-PWR-DC Power Specifications
QFX10000-PWR-DC power supplies are supported in only the QFX10008 and QFX10016 redundant
configuration.
Table 24 on page 72 lists the power specifications for the QFX10000-PWR-DC power
supply used in a QFX10000 modular chassis.
Table 24: Power Specifications for the QFX10000-PWR-DC Power Supply
Item Specifications
DC input voltage
•
Minimum operating voltage: –40 VDC
•
Nominal operating voltage: –48 VDC
•
Operating voltage range: –40 VDC through –72 VDC
DC input current rating 60 A maximum at nominal operating voltage (–48 VDC) for each
input terminal
Output power 2500 W
Table 25 on page 72 shows the physical specifications for a QFX10000-PWR-DC power supply.
Table 25: Physical Specifications of a QFX10000-PWR-DC Power Supply
Specification Value
Height 3.5 in. (8.89 cm)
72