Qfx10000 Dc Power Supply - Juniper QFX10016 Hardware Manual

QFX10016 Switch Hardware Guide

QFX10000 DC Power Supply

46
QFX10000 modular switches can use either AC or DC power supplies.
CAUTION: Do not mix AC and DC power supplies in the same chassis.
The DC power supplies in QFX10000 switches are 2500 W, hot-insertable, hot-removable,
field-replaceable units (FRUs). You can install up to six power supplies in a QFX10008
in the slots labeled through
PSU 0
you can install up to 10 power supplies in the slots labeled
supplies install in any available power supply slot.
The output of each DC power supply is 12 VDC. The output power is 2500 W.
WARNING: The switch is pluggable type A equipment installed in a
restricted-access location. It has a separate protective earthing terminal on
the chassis that must be connected to earth ground permanently to ground
the chassis adequately and protect the operator from electrical hazards.
CAUTION: Before you begin installing the switch, ensure that a licensed
electrician has attached an appropriate grounding lug to the grounding cable
that you supply. Using a grounding cable with an incorrectly attached lug can
damage the switch.
NOTE: DC power supplies are shipped only in the redundant configuration
of QFX10000 switches. For details about different chassis configurations,
see QFX10008 Components and Configurations and
and Configurations" on page
Each DC power supply weighs approximately 6 lb (2.7 kg) and has two independent pairs
of DC input lugs (
Input 1, RTN, –48V/–60V
of the power supply. Each inlet requires a dedicated DC power feed. Although each inlet
provides sufficient input power to provide full output, always connect to a dedicated DC
power feed to provide redundancy. Only one power feed is operational at a time.
DC power models employ electronic A-B input selection. It provides 2N source redundancy
and N+1 power supply redundancy using fewer power supplies than you would require
in a 2N configuration. Should one power source fail, electronic A-B input selection switches
the power supply to the alternate source.
Each DC power supply has a power switch with international markings for on (
( ), a fan, and four LEDs on the faceplate that indicate the status of the power supply.
O
See Figure 28 on page 47.
(top to bottom) located in the rear of the chassis;
PSU 5
PSU 0
12.
and
Input 2, RTN, –48V/–60V
Copyright © 2017, Juniper Networks, Inc.
through PSU 9 . Power
"QFX10016 Components
) on the faceplate
| ) and off