Qfx5120 Dc Power Specifications; Dc Power Supply Leds In Qfx5120 Switches - Juniper QFX5120 Series Hardware Manual

Table 21: Airflow Direction in DC Power Supply Models for QFX5120 Switches
Label on Power
Model Supply
JPSU-650-DC-AFO AIR OUT (AFO)
JPSU-650-DC-AFI AIR IN (AFI)

QFX5120 DC Power Specifications

The typical and maximum power consumption values are calculated using dummy transceivers on all ports.
Traffic is run at 25° C ambient.
Table 22: DC Power Specifications for QFX5120-48Y
Item
DC input voltage
DC input current rating
Typical power consumption
Maximum power consumption

DC Power Supply LEDs in QFX5120 Switches

Figure 34 on page 61shows the location of the LEDs on the DC power supply.
Direction of Airflow
Front-to-back—that is, air intake to cool the chassis is through the
vents on the front panel of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
Back-to-front—that is, air intake to cool the chassis is through the
vents on the rear panel of the chassis and hot air exhausts through
the vents on the front panel of the chassis.
Specifications
Rated operating voltage: –48 VDC
to 60 VDC
Operating voltage range: 40.8 VDC
through 72 VDC
20 A maximum
260W
450W
60