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EX4100 Power System

AC Power Supply in EX4100 Switches

Juniper Networks ships EX4100 switches with one power supply installed in the rear panel. You can install up to two power supplies in an EX4100 switch. The power supply slots are numbered 0 and 1, and each slot has a power icon next to it. The power supplies support front-to-back airflow or back-to-front airflow. They are fully redundant, load-sharing, hot-removable and hot-insertable field-replaceable units (FRUs). Hot-removable and hot-insertable mean that when the second power supply is installed and running, you can remove and replace the power supplies without powering off the switch or disrupting switch functions. This topic describes the AC power supplies that EX4100 switches support.

Do not mix:

  • AC and DC power supplies in the same chassis.

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

  • Fan modules with different airflow directions in the same chassis.

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

Characteristics of an AC Power Supply

The AC power supplies for EX4100 switches are field-replaceable units (FRUs).

  • The EX4100-24P and EX4100-48P switches use 920-W power supplies. The AC power supplies support Power over Ethernet (PoE+) in EX4100-24P and EX4100-48P switch models.

  • The EX4100-24MP and EX4100-48MP switches use 920-W power supplies. The AC power supplies support Power over Ethernet (PoE++) in EX4100-24MP and EX4100-48MP switch models.

  • The EX4100-24T, EX4100-48T, and EX4100-48T-AFI switches use 150-W power supplies.

Refer EX4100 Power System to check which EX4100 models use which PSUs or built-in power supplies.

Figure 1: 920-W AC Power Supply for EX4100-48P and EX4100-24P 920-W AC Power Supply for EX4100-48P and EX4100-24P
  1

Power Supply Unit Fan

  4

Power Supply Unit ejector lever

  2

Power Supply Unit DC LED

  5

Power Supply Unit inlet

  3

Power Supply Unit AC LED

  6

Power Supply Unit handle

Figure 2: 150-W AC Power Supply for EX4100-48T, EX4100-24T, and EX4100-48T-AFI 150-W AC Power Supply for EX4100-48T, EX4100-24T, and EX4100-48T-AFI
  1

Power Supply Unit fan

  4

Power Supply Unit ejector lever

  2

Power Supply Unit DC LED

  5

Power Supply Unit inlet

  3

Power Supply Unit AC LED

  6

Power Supply Unit handle

Table 1 lists details of the 920 W, 150 W AC power supplies used in EX4100 switches.

Table 1: Details of the AC Power Supplies in EX4100 Switches

Details

920 W AC Power Supply

150 W AC Power Supply

Model number

  • JPSU-920-AC-AFO

  • JPSU-150-AC-AFO

  • JPSU-150-AC-AFI

Minimum installed in chassis

1

1

Maximum installed in chassis

2

2

AC appliance inlet

Note:

Each AC appliance inlet requires a dedicated AC power source.

Number

1

1

Type

I

Power supply status LEDs

AC OK and DC OK

AC OK and DC OK

To prevent electrical injury while installing or removing AC power supplies, carefully follow instructions in Install an AC Power Supply in an EX4100 Switch and Remove an AC Power Supply from an EX4100 Switch.

Specifications of the AC Power Supplies Used in EX4100 Switches

  • Table 2 provides the power supply specifications of the 920 W AC power supplies.

  • Table 3 provides the power supply specifications of the 150 W AC power supplies.

Table 2: Specifications of the 920-W AC Power Supplies Used in EX4100 Switches

Item

Specification

AC input voltage

  • Low-voltage line: 100–127 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: 6.5 A

Output power

920 W

Table 3: Specifications of the 150-W AC Power Supplies Used in EX4100 Switches

Item

Specification

AC input voltage

  • Low-voltage line: 100–127 VAC

  • High-voltage line: 200–240 VAC

AC input line frequency

50–60 Hz

AC input current rating

  • Low-voltage line: 3 A

  • High-voltage line: 1.5 A

Output power

150 W

PoE Budget Planning

Table 4 shows the PoE budget planning details in EX4100-24P and EX4100-48P switch models. Table 5 shows the PoE budget planning details in EX4100-24MP and EX4100-48MP switches.

Table 4: PoE Budget Planning Details of EX4100-24P and EX4100-48P Switch Models

Model

System Budget

PoE Budget

Total Budget

Total PSU power

48P one PSU

106 W

740 W

846 W

920 W

48P two PSU

106 W

1440 W

1546 W

1840 W

24P one PSU

93 W

740 W

833 W

920 W

24P two PSU

93 W

1440 W

1533 W

1840 W

Table 5: PoE Budget Planning Details of EX4100-24MP and EX4100-48MP Switch Models

Model

System Budget

PoE Budget

Total Budget

Total PSU power

48MP one PSU

140 W

740 W

880 W

920 W

48MP two PSU

140 W

1620 W

1760 W

1840 W

24MP one PSU

129 W

740 W

869 W

920 W

24MP two PSU

129 W

1620 W

1749 W

1840 W

Note:

Apart from the aforementioned combinations, any other combination will be insufficient to power the switch.

AC Power Supply Airflow

Each power supply has its own fan and is cooled by its own internal cooling system. Each power supply has a label AIR OUT or AIR IN on the faceplate of the power supply. The label indicates the direction of airflow in the power supply. Table 6 lists the AC power supply models and the direction of airflow in them.

Table 6: Airflow Direction in AC Power Supply Models for EX4100 Switches

Model

Label on Power Supply

Direction of Airflow

  • JPSU-920-AC-AFO

  • JPSU-150-AC-AFO

AIR OUT

Front to back. Air to cool the chassis enters through the vents on the front panel of the chassis. Hot air exits through the vents on the rear panel of the chassis.

  • JPSU-150-AC-AFI

AIR IN

Back to front. Air to cool the chassis enters through the vents on the rear panel of the chassis. Hot air exits through the vents on the front panel of the chassis.

Specifications of the Power Cord for AC Power Supplies for EX4100 Switches

A detachable AC power cord is supplied with the AC power supplies. 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.

CAUTION:

The AC 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 (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 with Canadian Electrical Code (CEC) Section 4-010(3). The cords supplied with the switch are in compliance.

Table 7 gives the AC power cord specifications for the countries and regions listed in the table.

Table 7: AC Power Cord Specifications

Country or Region

Electrical Specifications

Plug Standards

Juniper Model Number

Argentina

250 VAC, 10 A, 50 Hz

IRAM 2073 Type RA/3

CBL-EX-PWR-C13-AR

Australia

250 VAC, 10 A, 50 Hz

AS/NZZS 3112 Type SAA/3

CBL-EX-PWR-C13-AU

Brazil

250 VAC, 10 A, 50 Hz

NBR 14136 Type BR/3

CBL-EX-PWR-C13-BR

China

250 VAC, 10 A, 50 Hz

GB 1002-1996 Type PRC/3

CBL-EX-PWR-C13-CH

Europe (except Italy, Switzerland, and the United Kingdom)

250 VAC, 10 A, 50 Hz

CEE (7) VII Type VIIG

CBL-EX-PWR-C13-EU

India

250 VAC, 10 A, 50 Hz

IS 1293 Type IND/3

CBL-EX-PWR-C13-IN

Israel

250 VAC, 10 A, 50 Hz

SI 32/1971 Type IL/3G

CBL-EX-PWR-C13-IL

Italy

250 VAC, 10 A, 50 Hz

CEI 23-16 Type I/3G

CBL-EX-PWR-C13-IT

Japan

125 VAC, 12 A, 50 Hz or 60 Hz

JIS 8303

CBL-EX-PWR-C13-JP

Korea

250 VAC, 10 A, 50 Hz or 60 Hz

CEE (7) VII Type VIIGK

CBL-EX-PWR-C13-KR

North America*

125 VAC, 13 A, 60 Hz

NEMA 5-15 Type N5-15

CBL-EX-PWR-C13-US

125 VAC, 15 A, 60 Hz

NEMA 5-15 Type N5-15

CBL-PWR-C13-US-48P

South Africa

250 VAC, 10 A, 50 Hz

SABS 164/1:1992 Type ZA/13

CBL-EX-PWR-C13-SA

Switzerland

250 VAC, 10 A, 50 Hz

SEV 6534-2 Type 12G

CBL-EX-PWR-C13-SZ

United Kingdom

250 VAC, 10 A, 50 Hz

BS 1363/A Type BS89/13

CBL-EX-PWR-C13-UK

Note:

For North America, use AC power cords with specifications 125 VAC, 13 A, 60 Hz for EX4100-24T and EX4100-48T.

Figure 3 illustrates the plug on the power cord for some of the countries or regions listed in Table 7.

Figure 3: AC Plug Types AC Plug Types
CAUTION:

Do not use the AC power cord with any other product other than EX4100.

CAUTION:

Power cords must not block access to switch components.

DC Power Supply in EX4100 Switches

EX4100 switches are shipped with one power supply installed in the rear panel of the switches. You can install up to two power supplies in an EX4100 switch. The power supply slots are numbered 0 and 1, and each slot has a power icon next to it. The power supplies support front-to-back airflow directions and are fully redundant, load-sharing, hot-removable and hot-insertable field-replaceable units (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. This topic describes the DC power supplies that EX4100 switches support.

Do not mix:

  • AC and DC power supplies in the same chassis.

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

  • Fan modules with different airflow directions in the same chassis.

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

Characteristics of a DC Power Supply

The DC power supplies for EX4100 switches are available in 150 W model. EX4100-48T-DC, EX4100-24T-DC support 150 W DC power supplies. You can install up to two DC power supplies in an EX4100 switch. Power supplies are installed in the power supply slots labeled PSU 0 and PSU 1 in the rear panel of the chassis.

Figure 4: 150 W DC Power Supply for EX4100-48T-DC and EX4100-24T-DC 150 W DC Power Supply for EX4100-48T-DC and EX4100-24T-DC
  1

Power supply unit fan

  4

Power supply unit ejector lever

  2

Power supply unit LED

  5

Power supply unit inlet

  3

Power supply unit LED

  6

Power supply unit handle

Table 8 lists the details of the 150 W DC power supplies used in EX4100 switches.

Table 8: Details of the DC Power Supplies in EX4100 Switches

Details

150 W DC Power Supplies

Model number

JPSU-150-DC-AFO

Minimum number of power supplies installed in chassis

1

Maximum number of power supplies installed in chassis

2

Power supply status LEDs

IN OK and OUT OK

To prevent electrical injury while installing or removing DC power supplies, carefully follow instructions in Install a DC Power Supply in an EX4100 Switch and Remove a DC Power Supply from an EX4100 Switch.

Specifications of the DC Power Supplies Used in EX4100 Switches

Table 9 provides the power supply specifications of the 150 W DC power supplies.

Table 9: Specifications of the 150 W DC Power Supplies Used in EX4100 Switches

Item

Specification

DC input voltage

Rated operating voltage: –48 VDC to –60 VDC

DC input current rating

4.7A - 2.8 A

Output power

150 W

DC Power Supply Airflow

Each power supply has its own fan and internal cooling system. Each power supply has a label AIR OUT or AIR IN on the faceplate of the power supply that indicates the direction of airflow through the power supply. Table 10 lists the DC power supply models and the direction of airflow throughthem.

Table 10: Airflow Direction in DC Power Supply Models for EX4100 Switches

Model

Label on Power Supply

Direction of Airflow

JPSU-150-DC-AFO

AIR OUT

Front to back: Air to cool the chassis enters through the vents on the front panel of the chassis. Hot air exits through the vents on the rear panel of the chassis.

Power Supply LEDs in EX4100 Switches

The power supply for EX4100 switches have one LED that indicates the state of the power supply (see Figure 5 and Figure 6).

Figure 5: LED on the AC Power Supply for EX4100 Switches LED on the AC Power Supply for EX4100 Switches
Figure 6: LED on the DC Power Supply for EX4100 Switches LED on the DC Power Supply for EX4100 Switches

Table 11 describes the AC power supply LEDs.

Table 11: AC Power Supply LEDs in EX4100 Switches

LED

Color

Description

AC OK

Unlit

Indicates one of the following:

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

  • The power supply is disconnected from the AC power feed.

Green

The power supply is receiving proper input power.

Red

The power supply has failed.

Flashing Red

This PSU is not receiving power.

DC OK

Unlit

Indicates one of the following:

  • AC OK LED is unlit.

  • The power supply is not delivering power correctly.

Green

The power supply is delivering power and is functioning correctly.

Red

The power supply has failed.

Flashing red

This PSU is not receiving power.

Note:

If the AC OK LED and the DC OK LED are not lit green, either the AC power cord is not installed properly or the power input voltage is not within normal operating range.

If the AC OK LED is lit green and the DC OK LED is unlit or lit red, the AC power supply is installed properly, but the power supply has an internal failure.

Table 12 describes the LEDs on the DC power supplies.

Table 12: DC Power Supply LEDs on an EX4100 Switch

Name

Color

Description

IN OK

Unlit

Indicates one of the following:

  • The power supply is disconnected from the DC power feed.

  • The DC power input voltage is not within the normal operating range.

Green

The power supply is receiving power.

Red

The power supply has failed.

Flashing Red

This PSU is not receiving power.

OUT OK

Unlit

Indicates one of the following:

  • IN OK LED is unlit.

  • The power supply is not delivering power correctly.

Green

The power supply is functioning correctly.

Red

The power supply has failed and must be replaced.

Flashing red

This PSU is not receiving power.