Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

EX4500 Power System

 

AC Power Supply in EX4500 Switches

The AC power supply in EX4500 switches is a hot-insertable and hot-removable field-replaceable unit (FRU): You can install it without powering off the switch or disrupting the switching function.

EX4500 switches ship with an AC power supply that gives an output of 1000 W at low-voltage line (100–120 VAC) and 1200 W at high-voltage line (200–240 VAC). You can install a second power supply in the switch too.

Power supplies are installed at the rear of the chassis in slots labeled 1 and 0. Both power supplies are accessible from the rear of the chassis.

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. See Connect Earth Ground to an EX Series Switch

Each AC power supply weighs approximately 3 lb (1.3 kg) and has an independent 12 A rated AC appliance inlet on its front. Each inlet requires a dedicated AC power feed. Each AC power supply has a fan, a bicolor LED on the faceplate that indicates the status of the power supply, and a colored ejector lever. See Figure 1.

Figure 1: AC Power Supply
AC Power Supply

Each AC power supply has an ejector lever that holds the power supply in place. The ejector lever locks into the corresponding hole in the chassis on the left side of the AC appliance inlet. For instructions for installing the power supply, see Installing an AC Power Supply in an EX4500 Switch.

Each AC power supply comes with a power cord retainer that holds the power cord in place. See Figure 2. The power cord retainer has a clip and an adjustment nut. The L-shaped ends of the retainer clip hook into the bracket holes on each side of the AC appliance inlet. The adjustment nut holds the power cord in the correct position. For instructions for installing the power cord retainer, see Installing an AC Power Supply in an EX4500 Switch.

Figure 2: Power Cord Retainer for an AC Power Supply
Power Cord Retainer
for an AC Power Supply

Each power supply has its own fan and is cooled by its own internal cooling system. The airflow for a power supply is either from the front of the power supply to the back or from the back of the power supply to the front depending on the switch model you purchase.

The color of the ejector lever on the power supply indicates the direction of airflow of the power supply.

  • Green—Front-to-back airflow

  • Orange—Back-to-front airflow

The color of the power supply's ejector lever must match the color of the intake or exhaust label visible through the vents of the installed fan tray. The color match indicates that the direction of airflow through the fan tray matches the direction of airflow through the power supply.

Caution

Verify that the direction of airflow through the power supply matches the direction of airflow through the fan tray to prevent overheating of the chassis.

Each AC power supply provides power to all components in the switch. The two power supplies provide full power redundancy to the switch. If one power supply fails or is removed, the second power supply balances the electrical load without interruption. The switch reassesses the power required to support the switch configuration and issues error messages if the available power is insufficient.

AC Power Supply LEDs in EX4500 Switches

An AC power supply has one bicolor LED on its faceplate. This LED displays information about the status of the power supply. See Figure 3.

Figure 3: AC Power Supply LEDs in EX4500 Switches
AC Power Supply LEDs in EX4500 Switches

Table 1 describes the LED on an AC power supply in an EX4500 switch.

Table 1: Power Supply LED on EX4500 Switches

LED State

Description

Unlit

Indicates one of the following:

  • Power supply is disconnected from AC power feed.

  • AC power input voltage is not within normal operating range.

  • No AC power input.

Green

  • On steadily—Power supply is functioning normally.

  • Blinking—Power supply has failed.

Amber

  • On steadily—Power supply has failed.

  • Blinking—Power supply has failed.

AC Power Supply Specifications for EX4500 Switches

Table 2 lists the power supply specifications for an AC power supply used in EX4500 switches.

Table 2: AC Power Supply Specifications for an EX4500 Switch

Item

Specifications

AC input voltage

Operating range:

  • Low-voltage line—100–120 VAC

  • High-voltage line—200–240 VAC

AC input line frequency

50–60 Hz

AC input current rating

  • Low-voltage line—12 A

  • High-voltage line—6 A

AC output power

  • Low-voltage line—1000 W

  • High-voltage line—1200 W

Power required by fans

 

AC Power Cord Specifications for an EX4500 Switch

Each AC power supply for the EX4500 switch has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the switch. An AC power cord connects each power supply to the power distribution panel.

Each detachable AC power cord is 2.5 meters (approximately 8 feet) long. The appliance coupler end of the cord inserts into the AC appliance inlet on the faceplate of the AC power supply. The coupler type is C19 as described by the 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 15 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) standards. The cords shipped with the switch are in compliance with these standards.

Table 3 lists the AC power cord specifications for an EX4500 switch for the countries and regions listed in the table.

Table 3: AC Power Cord Specifications for an EX4500 Switch

Country/Region

Electrical Specifications

Plug Standards

Juniper Model Number

Graphic

Argentina

250 VAC, 16 A, 50 Hz

IRAM Type RA/3/20

CBL-EX-PWR-C19-AR

No graphic available

Australia

250 VAC, 15 A, 50 Hz

AS/NZS 3112 Type SAA/3/15

CBL-EX-PWR-C19-AU

Brazil

250 VAC, 16 A, 50 Hz

NBR 14136: 2002 Type BR/3/20

CBL-EX-PWR-C19-BR

No graphic available

China

250 VAC, 16 A, 50 Hz

GB 1002 Type PRC/3/16

CBL-EX-PWR-C19-CH

Europe (except Italy, Switzerland, and United Kingdom)

250 VAC, 16 A, 50 Hz

CEE (7) VII Type VIIG

CBL-EX-PWR-C19-EU

India

250 VAC, 16 A, 50 Hz

SABS 164/1:1992 Type ZA/3

CBL-EX-PWR-C19-IN

No graphic available

Israel

250 VAC, 16 A, 50 Hz

SI 32/1971 Type IL/3

CBL-EX-PWR-C19-IL

Italy

250 VAC, 16 A, 50 Hz

CEI 23-16 Type I/3/16

CBL-EX-PWR-C19-IT

Japan

250 VAC, 16 A, 50 Hz

NEMA L6–20 Type NEMA Locking

CBL-EX-PWR-C19-JPL (default)

125 VAC, 15 A, 50 Hz

NEMA 5-15 Type N5/15

CBL-EX-PWR-C19-JP110V

Korea

250 VAC, 16 A, 50 Hz

CEE (7) VII Type VIIG

CBL-EX-PWR-C19-KR

North America

125 VAC, 15 A, 50 Hz

NEMA 5–15 Type N5/15

CBL-EX-PWR-C19-US110V

South Africa

250 VAC, 16 A, 50 Hz

SABS 164/1:1992 Type ZA/3

CBL-EX-PWR-C19-SA

Switzerland

250 VAC, 16 A, 50 Hz

SEV 5934/2 Type 23G

CBL-EX-PWR-C19-SZ

No graphic available

Taiwan

250 VAC, 16 A, 50 Hz

NEMA L6-20P Type NEMA LOCKING

CBL-EX-PWR-C19-TW

United Kingdom

250 VAC, 13 A, 50 Hz

BS 1363/A Type BS89/13

CBL-EX-PWR-C19-UK

Caution

The AC power cord for the EX4500 switch is intended for use with this switch only and not for any other use.

Power Cable Warning (Japanese)

Warning: The attached power cable is only for this product. Do not use the cable for another product.

Caution

Power cords must not block access to switch components.

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. See Connect Earth Ground to an EX Series Switch.

DC Power Supply in EX4500 Switches

The DC power supply in EX4500 switches is a hot-insertable and hot-removable field-replaceable unit (FRU).

EX4500 switches are shipped with one power supply. A cover panel is installed in the second power supply slot. You can add a second power supply to the switch.

Power supplies are installed at the rear of the chassis in slots labeled 1 and 0. Both power supplies are accessible from the rear of the chassis.

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. See Connect Earth Ground to an EX Series Switch.

Each DC power supply weighs approximately 3 lb (1.3 kg) and has a pair of DC input lugs (–48 VDC and RTN) on the front of the power supply. Each DC power supply also has a fan, a bicolor LED on the faceplate that indicates the status of the power supply, and a colored ejector lever. See Figure 4.

Figure 4: DC Power Supply
DC Power Supply
Note

A 1200 W DC power supply requires a dedicated 30 A circuit breaker for the input DC feed.

Each DC power supply has an ejector lever that holds the power supply in place. The ejector lever locks into the corresponding hole in the chassis. For instructions for installing the power supply, see Installing a DC Power Supply in an EX4500 Switch.

Each power supply has its own fan and is cooled by its own internal cooling system. The airflow for a power supply is from the front of the power supply to the back.

The color of the ejector lever on the power supply indicates the direction of airflow of the power supply.

  • Green—Front-to-back airflow

The color of the power supply's ejector lever must match the color of the exhaust label visible through the vents of the installed fan tray. The color match indicates that the direction of airflow through the fan tray matches the direction of airflow through the power supply.

Caution

Verify that the direction of airflow through the power supply matches the direction of airflow through the fan tray to prevent overheating of the chassis.

Each DC power supply provides power to all components in the switch. Two power supplies provide full power redundancy to the switch. If one power supply fails or is removed, the second power supply balances the electrical load without interruption. The switch reassesses the power required to support the switch configuration and issues error messages if the available power is insufficient.

The output for the DC power supply is 12 VDC. The output power is 1200 W.

DC Power Supply LEDs in EX4500 Switches

A DC power supply has one bicolor LED (labeled POK) on its faceplate. This LED displays information about the status of the power supply. See Figure 5.

Figure 5: DC Power Supply LED in EX4500 Switches
DC Power Supply LED in EX4500 Switches

Table 4 describes the LED on a DC power supply in an EX4500 switch.

Table 4: DC Power Supply LED on EX4500 Switches

LED

LED State

Description

P OK

Unlit

Indicates one of the following:

  • Power supply is disconnected from DC power feed.

  • DC power input voltage is not within normal operating range (–42 VDC through –60 VDC).

  • No DC power input.

 

Green

  • On steadily—Power supply is functioning normally.

  • Blinking—Power supply has failed.

 

Amber

  • On steadily—Power supply has failed.

  • Blinking—Power supply has failed.

DC Power Specifications for EX4500 Switches

Table 5 lists the power specifications for the DC power supply used in EX4500 switches.

Table 5: Power Specifications for the DC Power Supply Used in an EX4500 Switch

Item

Specifications

DC input voltage

  • Minimum operating voltage: –42 VDC

  • Nominal operating voltage: –48 VDC

  • Operating voltage range: –42 VDC through –60 VDC

DC input current rating

30 A maximum at nominal operating voltage (–48 VDC).

Output power

1200 W

Power required by fans