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ACX7509 Power System

SUMMARY The ACX7509 power system includes AC/HDVC power supplies and related power cords and cables, DC power supplies and related cords and cables, and cable lugs. The power supplies operate within specified ranges and are equipped with alarms and indicators.

The ACX7509 router is powered by 3000 W redundant hot-removable and hot-insertable pre-installed AC/high-voltage DC (HDVC) or DC power supplies. ACX7509-BASE configuration(One RCB and one FEB) requires 1 + 1 PSM redundancy and ACX7509-PREMIUM configuration requires 2+2 PSM redundancy. If you choose the ACX7509-BASE configuration, this can be connected to the same source or two separate sources for 1+1 redundancy. When you choose the ACX7509-PREMIUM configuration option, if you have the same power source you would need 2+1 PSM redundancy and if you have two separate power sources, you would need 2+2 PSM 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 V/50–60 Hz, 20A current

  • HVDC input voltage range: 240–280 V, 20A current

  • DC input voltage range: 40 volts direct current (VDC) Min, 72 VDC maximum, 80A current

CAUTION:

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

Note:

AC PSMs do not support AC low line of 110V.

Note:

BASE configuration routers are shipped with blank panels installed over the two empty power supply slots.

ACX7509 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 AC or HVDC input voltage and manage the power accordingly. AC power can be 180–305 volts alternating current (VAC) input voltage and HVDC power can be 190–400 VDC input voltage. Each 3000- W AC/HVDC PSM has a single AC or HVDC input and provides 12 V power to the system. Figure 1 shows the AC/HVDC power supply.

Figure 1: ACX7509 AC/HVDC Power Supply ACX7509 AC/HVDC Power Supply
  1
Power plug connector
  3
Ejector lever
  2
Status LED
  4
Orange handle

ACX7509 AC/HVDC Power Specifications

The ACX7509 operates within the AC/HVDC input voltage range listed in Table 1.

Table 1: ACX7509 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

ACX7509 AC/HVDC Power Supply LED

Each ACX7509 AC/HVDC PSM has a status LED on the module faceplate. See Figure 2.

Figure 2: ACX7509 AC/HVDC Power Supply LED ACX7509 AC/HVDC Power Supply LED
  1
Power supply LED
 

The ACX7509 router AC/HVDC PSM uses an amber and green bi–color LED to indicate the operating state. See Table 2.

Table 2: ACX7509 AC/HVDC Power Supply LED States
PSM State Green LED Amber LED

The PSM is on and operating properly.

On

Off

One or both power supplies lack AC power.

Off

Off

The PSM shut down due to a critical event such as high temperature, high power, high current, or fan failure.

Off

On

The PSM is operating but indicates a warning event such as high temperature (inlet temperature greater than 53 degrees or a hot spot temperature greater than 95 degrees), high power, high current, or slow fan (less than 1200 rpm).

Off

Blinking

The PSM output disabled by system software or other PSM in chassis on with 12VSB (vestigial sideband).

Blinking

Off

The AC power cord is unplugged.

Off

On

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

ACX7509 AC/HVDC Power Cord Specifications

Detachable AC power cords are shipped with the AC power supplies. 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 you can order for the ACX7509 router comply with those codes.

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

Table 3: ACX7509 Power Cord Specifications
Locale Cord Set Rating Plug Standards Spare Juniper Model Number Graphic

Argentina

20 A, 250 VAC

IRAM 2073

Type RA/3

CBL-JNP-SG4-AR

Australia and New Zealand

20 A, 250 VAC

AS/NZS 4417

CBL-JNP-SG4-AU

Brazil

20 A, 250 VAC

NBR 14136

Type BR/3

CBL-JNP-SG4-BR

China

20 A, 250 VAC

GB2099

CBL-JNP-SG4-CH

China and Japan

20 A, 250 VAC

C20 to Anderson 3-5958p4

CBL-JNP-SG4-C20-CH

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

20 A, 250 VAC

CEE 7/7

STRAIGHT

CBL-JNP-SG4-EU

Great Britain

20 A, 250 VAC

BS1363

CBL-JNP-SG4-UK

India

20 A, 250 VAC

SANS 164/1

CBL-JNP-SG4-SA

Israel

20 A, 250 VAC

SI 32/1971

Type IL/3G

CBL-JNP-SG4-IL

Italy

20 A, 250 VAC

CEI 23-16

CBL-JNP-SG4-IT

Japan

20 A, 250 VAC

Nema L-20

CBL-JNP-SGD4-JPL

North America

25 A/30 A, 250 VAC

C20 to Anderson 3-5958p4

CBL-JNP-SG4-C20

North America

25 A/30 A, 250 VAC

Locking NEMA L6-20P

CBL-JNP-SG4-US-L

North America

25 A/30 A, 250 VAC

NEMA 6-20P

CBL-JNP-SG4-US

North America

25 A/30 A, 250 VAC

NEMA I7-20P

CBL-JNP-SG4-HVAC

North America

25 A/30 A, 250 V

IEC 320P6W

CG_CBL-APP-400-02

South Africa

25 A/30 A, 250 VAC

SANS 164/1

CBL-JNP-SG4-SA

Switzerland

25 A/30 A, 250 VAC

CEI 23-50

CBL-JNP-SG4-SZ

Table 4: ACX7509 HVDC Cable Specifications (Bare Wire)
Cable Cord Set Rating Spare Juniper Model Number
HVDC power cord 20 A, 400 VDC CBL-PWR2-BARE
Note:

The insulation color for wires in the HVDC cables are color coded. Green is ground, black is line, and white is neutral. For HVDC, the black and white wires are not polarity-sensitive. The black wire can be positive (+) or neutral (–), and the white wire can be positive (+) or negative (–).

ACX7509 DC Power Supply Description

The ACX7509 DC power supplies are hot-removable and hot-insertable field-replaceable units (FRUs). Each 3000 W PSM has a single DC input and provides 12 VDC output with a standby voltage of 12 VDC. The ACX7509 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 3: ACX7509 DC Power Supply ACX7509 DC Power Supply
  1
Ejector lever
  4
Handle
  2
Status LED
  5
Terminal block cover
  3
DC input current selector (DIP switch)
 

ACX7509 DC Power Supply LED

Each ACX7509 DC PSM has a status LED on the PSM faceplate. See Figure 4.

Figure 4: ACX7509 DC Power Supply Status LED ACX7509 DC Power Supply Status LED
  1
Power supply status LED
 

Use Table 5 to interpret the state of the PSM status LED.

Table 5: ACX7509 DC Power Supply LED

LED Color

Power Supply State

Off

The power supplies do not have DC power

Solid green

The PSM is on and in the OK state

Blinking green

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

Solid amber

The DC power cord is unplugged, but the second PSM still has DC power.

Blinking amber

The PSM is operating, but there are warning events. Possible causes include high temperature, high power, high current, or a slow fan.

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

ACX7509 DC Input Current Selector

The ACX7509 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.

ACX7509 Input DC Voltage Specification

The ACX7509 DC PSMs operate within the DC input voltage range listed in Table 6.

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 6: ACX7509 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.

ACX7509 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 ACX7509 components or lie on the ground where people can trip on them.

ACX7509 DC Power Cable Lugs

The accessory box shipped with the ACX7509 router includes the cable lugs that attach to the terminal studs of each PSM. (The cable lug shown in Figure 5 is also used for grounding the chassis.) The cable lugs are dual hole and sized to fit 1/4-20 UNC terminal studs at 15.86-mm (0.625-in.) center line.

Figure 5: ACX7509 DC Power Cable Lugs ACX7509 DC Power Cable Lugs
CAUTION:

Before you begin to install the ACX7509 router, have a licensed electrician attach a cable lug to the power cables that you supply. A cable with an incorrectly attached lug can damage the ACX7509 router.