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EX4600 Power System

 

AC Power Supply in an EX4600 Switch

Except for the EX4600-40F-S switch, the EX4600 is shipped from the factory with two power supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.

The AC power supply is 650 W. It is the same power supply used in Juniper Networks QFX5100 switches.

Caution

Do not mix power supplies with different airflow or different wattage. The system raises an alarm when a power supply having a different airflow or wattage is inserted into the chassis.

See Figure 1 for an example of the power supply.

Figure 1: AC Power Supply in EX4600 Switches
AC Power Supply in
EX4600 Switches
  1
Handle
  3
AC appliance inlet
  2
Security latch
  4
Ejector lever

The power supply provides FRU-to-port or port-to-FRU airflow depending on the product SKU you purchase. On legacy switches, or switches with an LCD, this airflow is called back-to-front and front-to-back. The power supplies either have labels on the handles that indicate the direction of airflow or they have color-coded handles with a fan icon. See Figure 2 for an example of the power supply. Either a power supply has the label AFI or a blue handle, which denotes FRU-to-port airflow. A power supply with the label AFO or a gold-colored handle denotes port-to-FRU airflow.

Figure 2: Power Supply Handle Detail
Power Supply Handle
Detail
  1
Fan icon on handle
 
Caution

Verify that the airflow direction on the power supply handle matches the direction of airflow in the chassis. Ensure that each power supply 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, and the fault ALM LED blinks amber. If you need to convert the airflow pattern on a chassis, you must change out all the fans and power supplies at one time to use the new direction.

Table 1 shows the different power supplies and their direction of airflow.

Table 1: Airflow Direction in EX4600 and QFX5100 AC Power Supplies

Product Number

Direction of Airflow

Color of Power Supply Handle

JPSU-650W-AC-AFI

QFXC01-PWRACI-650A

FRU-to-port

Juniper azure blue

 

JPSU-650W-AC-AFO

Port-to-FRU

Juniper gold

 

To avoid electrical injury, carefully follow instructions in Connecting AC Power to an EX4600 Switch.

AC Power Supply LEDs on an EX4600 Switch

Figure 3 shows the location of the LEDs on the power supply.

Figure 3: AC Power Supply LEDs on an EX4600 Switch
AC Power Supply LEDs
on an EX4600 Switch

Table 2 describes the LEDs on the AC power supplies.

Table 2: AC Power Supply LEDs on a EX4600 Switch

LED

Color

State

Description

AC OK

Unlit

Off

The power supply is disconnected from power, or power is not coming into the power supply.

Green

On steadily

Power is coming into the power supply.

DC OK

Unlit

Off

The power supply is disconnected from power, or the power supply is not sending out power correctly.

Green

On steadily

The power supply is sending out power correctly.

Fault

Amber

On steadily

An error has been 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.

Note

If the AC OK LED and the DC OK LED are unlit, either the AC power cord is not installed properly or the power supply fuse has failed. If the AC OK LED is lit and the DC OK LED is unlit, the AC power supply is installed properly, but the power supply has an internal failure.

AC Power Specifications for an EX4600 Switch

Table 3 describes the AC power specifications for an EX4600 switch.

Table 3: AC Power Specifications for an EX4600 Switch

Item

Specification

AC input voltage

Operating range: 100–240 VAC

AC input line frequency

50–60 Hz

AC input current rating

  • 4.5 A at 100–120 VAC

  • 2.0 A at 200–240 VAC

Typical power consumption: 230 W

Maximum power consumption: 365 W

AC Power Cord Specifications for an EX4600 Switch

Detachable AC power cords are shipped with the chassis, if you include them as part of your order. The coupler is type C13 as described by International Electrotechnical Commission (IEC) standard 60320. 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 4.5 meters (approximately 14.75 feet) 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 EX4600 switch are in compliance.

Table 4 lists AC power cord specifications provided for each country or region.

Table 4: AC Power Cord Specifications

Country/Region

Electrical Specifications

Plug Standards

Juniper Model Number

Graphic

Australia

250 VAC, 10 A, 50 Hz

AS/NZ 3109-1996

CBL-EX-PWR-C13-AU

China

250 VAC, 10 A, 50 Hz

GB 1002-1996

CBL-EX-PWR-C13-CH

Europe (except Italy, Switzerland, and United Kingdom)

250 VAC, 10 A, 50 Hz

CEE (7) VII

CBL-EX-PWR-C13-EU

Italy

250 VAC, 10 A, 50 Hz

CEI 23-16/VII

CBL-EX-PWR-C13-IT

Japan

125 VAC, 12 A, 50 Hz or 60 Hz

JIS C8303

CBL-EX-PWR-C13-JP

North America

125 VAC, 13 A, 60 Hz

CAN/CSA No. 49-92

CBL-EX-PWR-C13-US

South Korea

250 VAC, 10 A, 60 Hz

KSC 8305; K60884-1

CBL-EX-PWR-C13-KR

Switzerland

250 VAC, 10 A, 50 Hz

SEV 1011 SEV 1991; EN 60320 C13

CBL-EX-PWR-C13-SZ

United Kingdom

250 VAC, 10 A, 50 Hz

BS 1363/A

CBL-EX-PWR-C13-UK

DC Power Supply in an EX4600 Switch

Except for the EX4600-40F-S switch, the EX4600 is shipped from the factory with two power supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.

The DC power supply is 650 W with dual feeds for power resiliency. It is same power supply that is used in the Juniper Networks QFX5100 line of switches (see Figure 4).

Figure 4: DC Power Supply in EX4600 and QFX5100 Switches
DC Power Supply in
EX4600 and QFX5100 Switches
  1
Terminal block
  3
Ejector lever
  2
ESD grounding point
  4
Handle
Note

The DC power supply in the switch has four terminals labeled V-, V-, V+, and V+ (see Figure 5) for connecting DC power source cables labeled positive (+) and negative (–).

Figure 5: DC Power Supply Faceplate in EX4600 Switches
DC Power Supply
Faceplate in EX4600 Switches
  1
Feed B input terminals
  5
ESD grounding point
  2
Feed A input terminals
  6
Fault LED
  3
Terminal block
  7
Output LED
  4
Ejector lever
  8
Input LED

To supply sufficient power, terminate the DC input wiring on a facility DC source that is capable of supplying a minimum of 7 A at –48 VDC.

To avoid electrical injury, carefully follow instructions in Installing a Power Supply in an EX4600 Switch and Removing a Power Supply from an EX4600 Switch.

DC Power Supply LEDs in EX4600 Switches

Figure 6 shows the location of the LEDs on the DC power supply.

Figure 6: DC Power Supply Faceplate on an EX4600 Switch
DC Power Supply
Faceplate on an EX4600 Switch
  1
Input LED
  3
Fault LED
  2
Output LED
 
Caution

The V+ terminals are shunted internally together, as are the V- terminals. The same polarity terminal can be wired together from the same source to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources.

Table 5 describes the LEDs on the DC power supplies.

Table 5: DC Power Supply LEDs on an EX4600 Switch

LED

Color

State

Description

In

Unlit

Off

The power supply is disconnected from power, or power is not coming into the power supply.

Green

On steadily

Power is coming into the power supply.

Out

Unlit

Off

The power supply is disconnected from power, or the power supply is not sending out power correctly.

Green

On steadily

The power supply is sending out power correctly.

Fault

Amber

On steadily

An error has occurred 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.

DC Power Specifications for an EX4600 Switch

Table 6 describes the DC power specifications for DC product SKUs of the EX4600 switch.

Table 6: DC Power Specifications for an EX4600 Switch

Item

Specifications

DC input voltage

  • Rated operating voltage: –48 VDC to -60 VDC

  • Operating voltage range: -40 VDC through –72 VDC

DC input current rating

10 A maximum

Typical power consumption

300 W

Maximum power consumption

385 W

Grounding Cable and Lug Specifications for an EX4600 Switch

For installations that require a separate grounding conductor to the chassis, the switch must be adequately grounded before power is connected to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground an EX4600 switch, connect a grounding cable to earth ground and then attach it to the chassis grounding points.

Warning

The switch is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth ground for installations that require a separate grounding conductor to the chassis.

Caution

Before switch installation begins, a licensed electrician must attach a cable lug to the grounding cables that you supply. See Connecting Earth Ground to an EX4600 Switch. A cable with an incorrectly attached lug can damage the switch.

Before connecting the switch to earth ground, review the following information:

  • A protective earthing terminal bracket is provided in the accessory kit for connecting the switch to earth ground. This L-shaped bracket attaches to the side of the EX4600 chassis through the mounting bracket, providing a protective earthing terminal for the switch.

  • The grounding lug required is a Panduit LCD10-10A-L or equivalent (not provided).. The grounding lug should accommodates 14–10 AWG (2–5.3 mm²) stranded wire.

  • The grounding cable that you provide for a EX4600 must be 14 AWG (2 mm²), minimum 60° C wire, or as permitted by the local code.

  • Ensure you have two SAE 10-32 washers and screws to attach the cable and bracket (not provided).