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High-Voltage Power Supply for QFX5120-48T Switches

 

QFX5120 switches support two 650-W AC or DC power supplies with front-to-back or back-to-front airflow directions. Additionally, QFX5120-48T switches support two 850-W high-voltage power supplies with AC or DC input and front-to-back or back-to-front airflow. You must order a high-voltage power supply separately. Power supplies for the QFX5120 switch are fully redundant, load-sharing, and hot-removable and hot-insertable FRUs when the second power supply is installed and running. You can remove and replace them without powering off the switch or disrupting switch functions. We ship QFX5120 switch models with two AC or DC power supplies preinstalled in the rear panel of the chassis. This topic describes the high-voltage power supplies supported on QFX5120-48T switches.

Caution

Do not mix:

  • AC and DC power supplies in the same chassis.

  • 650-W and 850-W power supplies in the same QFX5120-48T chassis.

  • Power supplies with different airflow directions in the same chassis.

  • Power supplies and fan modules with different airflow directions in the same chassis.

Characteristics of the High-Voltage Power Supply for QFX5120-48T Switches

QFX5120-48T switches support two high-voltage power supplies with AC or DC input and front-to-back or back-to-front airflow.

Figure 1 shows the high-voltage power supply for QFX5120-48T switches.

Figure 1: High-Voltage Power Supply for QFX5120-48T Switches
High-Voltage
Power Supply for QFX5120-48T Switches
  1
Power supply handle
  3
Ejector lever
  2
Power cord inlet
 

You can install up to two power supplies in the power supply slots in the rear panel of the QFX5120 switch chassis. On QFX5120-48T switches, the slots are labeled 0 and 1 and have a power icon next to them.

Table 1 lists the specifications of the high-voltage power supplies used in QFX5120-48T switches.

Table 1: Specifications of the High-Voltage Power Supplies Used in QFX5120-48T Switches

Item

Specifications

Model number

QFX5120-48T: JPSU-850W-HV-AFO or JPSU-850W-HV-AFI

Field-replaceable unit (FRU) type

Hot-insertable and hot-removable

Weight

2.2 lb (1 kg)

Minimum installed in chassis

1

Maximum installed in chassis

2

Power supply slots

Slots labeled 0 and 1 with a power icon next to them in the rear panel of the chassis.

Fans

Internal

Power supply status LEDs

AC, DC, and ! (fault)

To prevent electrical injury while installing or removing power supplies, carefully follow instructions in Connect Power to a QFX5120-48T Switch Powered by a High-Voltage Power Supply and Maintain the QFX5120 Power System.

High-Voltage Power Supply Airflow

Each power supply is cooled by its own internal cooling system.

The power supplies have color-coded handles that indicate the direction of the airflow. The Juniper Gold handles and AIR OUT label on the power supplies for QFX5120-48T switches indicate front-to-back airflow. The Juniper Azure Blue handles and AIR IN label on the power supplies for QFX5120-48T switches indicate back-to-front airflow.

Caution

Verify that the airflow direction in the power supplies matches the airflow direction in the fan modules. Ensure that each power supply that you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm. If you need to change the airflow direction in a chassis, you must replace all the fan modules and power supplies with the other airflow direction and update the installation base (see Register Products—Mandatory to Validate SLAs).

Table 2 lists the high-voltage power supplies used in QFX5120-48T switches and the direction of airflow in them.

Table 2: Airflow Direction in High-Voltage Power Supplies for QFX5120-48T Switches

Power Supply

Direction of Airflow

Color of the Power Supply Handle

JPSU-850W-HV-AFO

Front-to-back—cold 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.

Juniper Gold

JPSU-850W-HV-AFI

Back-to-front—cold 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.

Juniper Azure Blue

Power Supply Specifications for High-Voltage Power Supplies for QFX5120-48T switches

Table 3 shows the power supply specifications for the high-voltage power supplies for QFX5120-48T switches operating with AC input.

Table 3: Power Supply Specifications for the High-Voltage Power Supplies for QFX5120-48T Switches Operating with AC Input

Item

Specification

AC input voltage

Operating range: 100 VAC through 277 VAC

AC input line frequency

50–60 Hz

AC input current rating

  • 6 A at 100 VAC

  • 3 A at 277 VAC

Typical power consumption

290 W

Maximum power

440 W

Table 4 shows the power supply specifications for the high-voltage power supplies for QFX5120-48T switches operating with DC input.

Table 4: Power Supply Specifications for the High-Voltage Power Supplies for QFX5120-48T Switches Operating with DC Input

Item

Specification

DC input voltage

Operating range: 240 VDC through 380 VDC

DC input current rating

4 A

Typical power consumption

290 W

Maximum power

440 W

Specifications of the Power Cord for High-Voltage Power Supply for QFX5120-48T Switches

You can order a detachable power cord separately for your high-voltage power supplies. The plug or connector of the power cord fits into the power source outlet that is standard for your geographical location.

Caution

The power cord provided with each power supply is intended for use with that power supply only and not for any other use.

Note

In North America, AC power cords must not exceed 4.5 meters in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52 and Canadian Electrical Code (CEC) Section 4-010(3). The cords supplied with the switch are in compliance.

Table 5 lists the specifications of the power cord for the high-voltage power supplies provided for the countries and regions listed in the table.

Table 5: Specifications of the Power Cords for the High-Voltage Power Supplies

Locale

Cord Set Rating

Plug Standards

Spare Juniper Model Number

Graphic

Argentina

16 A, 250 VAC

IRAM 2073 Type RA/3

CBL-JNP-SG4-AR

Australia and New Zealand

15 A, 250 VAC

AS/NZS 4417

CBL-JNP-SG4-AU

Brazil

16 A, 250 VAC

NBR 14136 Type BR/3

CBL-JNP-SG4-BR

China

16 A, 250 VAC

GB2099

CBL-JNP-SG4-CH

Europe (except Italy, Switzerland, and United Kingdom)

20 A, 250 VAC

CEE 7/7 STRAIGHT

CBL-JNP-SG4-EU

Great Britain

13 A, 250 VAC,

BS1363

CBL-JNP-SG4-UK

India

16 A, 250 VAC

SANS 164-1

CBL-JNP-SG4-SA

Israel

16 A, RA, 250 VAC

SI 32/1971 Type IL/3G

CBL-JNP-SG4-IL

Italy

16 A, 250 VAC

CEI 23-16

CBL-JNP-SG4-IT

North America

20 A, 250 VAC

C20 to Anderson 3-5958p4

CBL-JNP-SG4-C20

North America

16 A, 250 VAC

Locking NEMA L6-20P

CBL-JNP-SG4-US-L

North America

16 A, 250 VAC

NEMA 6-20P

CBL-JNP-SG4-US

North America

15 A, 277 V

NEMA I7-20P

CBL-JNP-SG4-HVAC

North America

20 A, 250 V

IEC 320P6W

CG_CBL-APP-400-02

South Africa

16 A, 250 VAC

SANS 164-1

CBL-JNP-SG4-SA

Switzerland

16 A, 250 VAC

CEI 23-50

CBL-JNP-SG4-SZ

All countries

16 A, 400 VAC

You can attach a plug as permitted by the local code.

CBL-PWR2-BARE

This bare cable is used for connecting to DC power input and is shipped without any lug attached. You can attach DC connector lugs as permitted by the local code.

All countries

16 A, 400 VAC

You can attach a plug as permitted by the local code.

CBL-PWR2-BARE-RA

This bare cable is used for connecting to DC power input and is shipped without any lug attached. You can attach DC connector lugs as permitted by the local code.

North America

30 A, 400 VAC

Both the ends of this cable have the same SAF-D-Grid connector.

CBL-PWR-SG4

Both the ends of this cable have the same SAF-D-Grid connector.

Europe

16 A, 250 VAC

IEC 316P6

CBL-JNP-SG4-316P6

North America and Canada

20 A, 250 VAC

IEC 320P6

CBL-JNP-SG4-320P6

LEDs on the High-Voltage Power Supply Used in QFX5120-48T Switches

Figure 2 shows the location of the LEDs on the high-voltage power supply used in QFX5120-48T switches.

Figure 2: LEDs on the High-Voltage Power Supply Used in QFX5120-48T Switches
LEDs
on the High-Voltage Power Supply Used in QFX5120-48T Switches
  1
AC LED (labeled AC )
  3
Fault LED (labeled !)
  2
DC LED (labeled DC)
 

Table 6 describes the LEDs on the high-voltage power supply used in QFX5120-48T switches.

Table 6: LEDs on the High-Voltage Power Supply Used in QFX5120-48T Switches

LED Label

Color

State

Description

AC

Green

On steadily

The power supply is receiving power.

Unlit

Unlit

  • The power supply is disconnected from power, or the power supply is not receiving power.

  • The AC power cord or DC input cables might not be installed properly, or the power input voltage might not be within normal operating range.

DC

Green

On steadily

The power supply is sending out power correctly.

Unlit

Unlit

  • The power supply is disconnected from power, or the power supply is not receiving power.

  • The AC power cord or DC input cables might not be installed properly, or the power input voltage might not be within normal operating range.

  • The power supply might have an internal failure.

! (Fault)

Amber

On steadily

An error is detected in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.