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QFX5700 Power System

The QFX5700 switch is powered by 3000 W redundant hot-removable and hot-insertable pre-installed AC/HDVC or DC power supplies. QFX5700-BASE Configuration (One RCB and one FEB) requires 1 + 1 PSU redundancy. If you choose the QFX5700-BASE Configuration, this can be connected to the same source or two separate sources for 1+1 redundancy. If any power supply unit fails, you can replace it without powering off or disrupting the routing function, the other power supply units will balance the electrical load without interruption. Each power supply unit has two outputs: 12 V and 12 V standby. Two counter-rotating fans in each power supply unit provide front to back cooling. The input voltages are as follows:

  • AC input voltage range: 200 - 277 VAC

  • DC input voltage range: 40 VDC Min, 72 VDC maximum

CAUTION:

Do not mix AC and DC power supplies in the same chassis.

QFX5700 AC/HVDC Power Supply Description

The input power to the AC/HVDC power supplies can be AC power or HVDC power. The power supplies automatically detect whether there is AC or HVDC input voltage and manage the power accordingly. AC power can be 180–305 VAC input voltage and HVDC power can be 190–400 VDC input voltage. Each 3000- W AC/HVDC power supply unit has a single AC or HVDC input and provides 12 V power to the system.

Figure 1: QFX5700 Power Supply QFX5700 Power Supply
  1
—

Power plug connector

  3
—

Ejector level

  2
—

Status LED

  4
—

Orange handle

The QFX5700 operates within the AC/HVDC input voltage range listed in the table below.

Table 1: QX5700 AC/HVDC Power Specifications

Parameter

Minimum

Rated

Maximum

Input voltage (AC)

180 VAC

200–277 VAC

305 VAC

Input voltage (HVDC)

190 VAC

240–380 VDC

400 VDC

AC input line frequency

47 Hz

50–60 Hz

63 Hz

Figure 2 shows the location of the AC power supplies on the QFX5700 FRU panel.

Figure 2: QFX5700 with Power Supplies Installed QFX5700 with Power Supplies Installed
  1
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PSUs

  2
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Fan trays

QFX5700 AC/HVDC Power Supply LEDs

Each QFX5700 AC power supply has a status LED on the power supply faceplate. QFX5700 switch AC/HVDC power supply unit uses an amber and green bi–color LED to indicate the operating state.

Figure 3: QFX5700 AC/HVDC Power Supply LEDs QFX5700 AC/HVDC Power Supply LEDs
  1
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Power Supply LED

 
Table 2: QFX5700 AC/HVDC Power Supply LED States

State

Green

Amber

The PSU is on and operating properly

On

Off

Power supply does not have AC power

Off

Off

The power supply unit shut down due to a critical event. Possible causes: high temperature, high power, high current, fan failure

Off

On

The power supply unit is operating but there are warning events. Possible conditions: high temp (inlet temperature is greater than 53 degrees or a hot spot temperature is greater than 95 degrees), high power, high current, slow fan (less than 1200 rpm)

Off

Blinking amber

PSU output disabled by system software or other PSU in chassis on with 12VSB.

Blinking

Off

You can get additional information about the status of the power supply units using the show chassis powercommand and the show chassis power detailcommand.

QFX5700 AC Power Cord Specifications

Detachable AC power cords are shipped with the chassis if you include them as part of your order. The plug end of the power cord fits into the power source outlet that is standard for your geographical location.

Note:

In North America, AC power cords must not exceed 14.75 feet (approximately 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 that can be ordered for the QFX5700 are in compliance.

Table 3 lists AC power cord specifications provided for each country or region.

Table 3: QFX5700 Power Cord Specifications

Locale

Cord Set Rating

Plug Standards

Spare Juniper Model Number

Graphic

Argentina

250 VAC, 20 A,

IRAM 2073 Type RA/3

CBL-JNP-SG4-AR

Australia and New Zealand

250 VAC, 20 A

AS/NZS 4417

CBL-JNP-SG4-AU

Brazil

250 VAC, 20 A

NBR 14136 Type BR/3

CBL-JNP-SG4-BR

China

250 VAC, 20 A

GB2099

CBL-JNP-SG4-CH

Europe (except Italy, Switzerland, and United Kingdom)

250 VAC, 20 A

CEE 7/7 STRAIGHT

CBL-JNP-SG4-EU

Great Britain

250 VAC, 20 A

BS1363

CBL-JNP-SG4-UK

India

250 VAC, 20 A

SANS 164/1

CBL-JNP-SG4-SA

Israel

250 VAC, 20 A

SI 32/1971 Type IL/3G

CBL-JNP-SG4-IL

Italy

250 VAC, 20 A

CEI 23-16

CBL-JNP-SG4-IT

North America

250 VAC, 25 A/30 A

C20 to Anderson 3-5958p4

CBL-JNP-SG4-C20

North America

250 VAC, 25 A/30 A

Locking NEMA L6-20P

CBL-JNP-SG4-US-L

North America

250 VAC, 25 A/30 A

NEMA 6-20P

CBL-JNP-SG4-US

North America

250 VAC, 25 A/30 A

NEMA I7-20P

CBL-JNP-SG4-HVAC

North America

250 VAC, 25 A/30 A

IEC 320P6W

CBL-JNP-SG4-320P6W

South Africa

250 VAC, 25 A/30 A

SANS 164/1

CBL-JNP-SG4-SA

Switzerland

250 VAC, 25 A/30 A

CEI 23-50

CBL-JNP-SG4-SZ

QFX5700 DC Power Supply Description

The QFX5700 DC power supplies are hot-removable and hot-insertable FRUs. Each 3000 W power supply unit has a single DC input and provides 12 VDC output with a standby voltage of 12 VDC. The QFX5700 DC power supplies can operate with an input current of 80 A or 60 A.

CAUTION:

Do not mix AC/HVDC and DC power supplies in the same chassis.
Figure 4: QFX5700 DC Power Supply Description QFX5700 DC Power Supply Description
  1
—

DC input current selector (DIP switch)

  3
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Handle

  2
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Inlet terminal block

  4
—

Ejector Lever

QFX5700 DC Power Supply LED

Each QFX5700 DC power supply unit has a status LED on the power supply unit faceplate.

Figure 5: QFX5700 DC Power Supply Status LED
  1
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Power supply status LED

 

LED Color

Power Supply State

Solid green

The power supply unit is on and in the OK state.

Off

The power supplies do not have DC power.

Blinking green

PSU output disabled by system software or other PSU in chassis ON with 12VSB.

Solid amber

The DC power cord is unplugged but the second power supply unit still has DC power.

Blinking amber

The power supply unit is operating but there are warning events. Possible causes: high temp, high power, high current, slow fan.

The 60 A DC power supply unit capacity changes when the input voltage is below or above the under voltage limit as follows:

  • When the 60 A DC power supply unit input voltage is above the input under voltage warning limit, its capacity is 2700 W.

  • When the input voltage is below the input under voltage warning limit, the power supply unit capacity is reduced to 2200 W.

When the input voltage is above the input under voltage warning limit, the software adjusts the system capacity and reallocates power to the FRUs based on the new system capacity.

You can get additional information about the status of the PSMs using the show chassis power command and show chassis power detail command.

QFX5700 DC Input Current Selector

The QFX5700 DC PSM can operate with an input current of 80 A or 60 A. You select the input rating by moving the DC input current selector (DIP switch) to the desired setting. If you select 60 A, the PSM limits the output power so that the input current does not exceed 60 A under normal steady-state operation. If you select 80 A, the PSM limits the output power so that the input current does not exceed 80 A.

For example:

If you select...

Then...

60 A

The PSM limits the output power to 2200 W when the input voltage is between 40V and 48V. It linearly increases the output power if the input voltage increases. The PSM provides 2700 W output power when the input voltage is between 48V and 72V.

80 A

The PSM provides 3000 W output power throughout the input voltage range from 40 VDC to 72 VDC.

QFX5700 Input DC Voltage Specification

The QFX5700 DC PSMs operate within the DC input voltage range listed in .

Note:

Depending on the available input source, Juniper recommends that the 48-VDC facility DC source be equipped with a 2 pole circuit breaker rated at a minimum of 60 A (48 VDC) or 80 A  (48 VDC) based on DIP switch current setting, or as required by local code.
Table 4: QFX5700 DC Power Specifications

Input Switch Setting

Minimum Input DC Voltage

Rated Input DC Voltage

Maximum Input DC Voltage

Maximum Input DC Current

Maximum Output Power

60 A

40 VDC

48 VDC to 60 VDC

72 VDC

60 ADC

2700 W

80 A

40 VDC

48 VDC to  60 VDC

72 VDC

90 ADC

3000 W

60 A Input Feed Power Management

The 60 A DC PSM capacity changes when the input voltage is below or above the under-voltage limit, as follows:

  • When the 60 A DC PSM input voltage is above the input under-voltage warning limit, its capacity is 2700 W.

  • When the input voltage is below the input under-voltage warning limit, the PSM capacity is reduced to 2200 W.

When the input voltage is above the input under-voltage warning limit, the software adjusts the system capacity and reallocates power to the FRUs based on the new system capacity.

QFX5700 DC Power Cables

You must supply DC power cables that meet the specifications required by the local code, laws, and standards. The wire insulation is color coded. Green is ground, black is line, and white is neutral. The wires are labeled (+) and (–) to indicate their polarity.

CAUTION:

You must ensure that power connections maintain the proper polarity.
Warning:

For field-wiring connections, use copper conductors only.
Warning:

Make sure that DC power cables do not block access to QFX5700 components or lie on the ground where people can trip on them.

QFX5700 DC Power Lugs

The accessory box shipped with the QFX5700 includes the cable lugs that attach to the terminal studs of each power supply module. (The cable lug shown in Figure 36 on page 61 is also used for grounding the chassis). The cable lugs are dual hole and sized to fit M6 at 15.86-mm (0.625-in.) center line. For grounding, the lug that should be used can be LCC4-14AH-Q as per local code.

Figure 6: QFX5700 DC Power Lugs QFX5700 DC Power Lugs

QFX5700 DC Power Cables

You must supply the DC power cables that meet the specifications required by the local code, laws, and standards. The insulation color of the wires are color coded. Green is ground, black is line, and white is neutral. The wires are labeled (+) and (–) to indicate their polarity.

CAUTION:

You must ensure that power connections maintain the proper polarity.

Warning:

For field-wiring connections, use copper conductors only.
Warning:

DC Power cables must not block access to QFX5700 components or drape where people could trip on them.