MX480 AC Power System

MX480 AC Power Supply Description

Each AC power supply weighs approximately 5.0 lb (2.3 kg) and consists of one AC appliance inlet, an AC input switch, a fan, and LEDs to monitor the status of the power supply. Figure 1 shows the power supply. For existing power supplies, each inlet requires a dedicated AC power feed and a dedicated 15 A (250 VAC) circuit breaker.

For high-capacity power supplies, each inlet requires a dedicated AC power feed and a dedicated 16.0 A @ 100 VAC or 16.0 A @ 200 VAC circuit breaker, or as required by local code.

Figure 1: AC Power Supply

Figure 2: High-Capacity AC Power Supply

Warning:

The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) 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.

Note:

You can mix the MX480 high-capacity and normal-capacity power supplies only during the PEM upgrade process. We do not recommend using this configuration in any other cases.

AC Power Supply Configurations

The MX480 high-capacity and normal-capacity power supplies each support either of the following AC power configurations:

In the low-line (110 V) AC power configuration, the MX480 router contains three or four AC power supplies (see Figure 1), located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right). Each AC power supply provides power to all components in the router. When three power supplies are present, they share power almost equally within a fully populated system. Four AC power supplies provide full power redundancy. If one power supply fails or is removed, the remaining power supplies assume the entire electrical load without interruption. Three power supplies provide the maximum configuration with full power for as long as the router is operational. The low-line configuration requires three power supplies and the fourth power supply provides redundancy. With high-capacity power supplies, you must have a minimum of three power supplies installed in the router.
In the high-line (220 V) AC power configuration, the MX480 router contains two or four AC power supplies (see Figure 1), located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right). In a high-line AC power configuration, each AC power supply provides power to all components in the router. When two or more power supplies are present, they share power almost equally within a fully populated system. Four AC power supplies provide full power redundancy. If one power supply fails or is removed, the remaining power supplies assume the entire electrical load without interruption. Two power supplies provide the maximum configuration with full power for as long as the router is operational. In the two-PEM high-line configuration, either slots PEM0 and PEM1 or slots PEM2 and PEM3 are used. The high-line configuration requires two power supplies, where two PEMs are needed to fully power the system, with the third and fourth providing redundancy.

Note:

All supplies should have the same feed setting.
Correct usage of the feed setting is required for all supplies in order to get the desired power inventory management.
Juniper Networks strongly recommends that you install Junos OS Release 8.4R2 or later before deploying the MX480 router into service.
The XFP cages and optics on the MX480 router are industry standard parts that have limited tactile feedback for insertion of optics and fiber. You need to insert the optics and fiber firmly until the latch is securely in place. [PR/98055]
Do not mix AC and DC power supplies on an MX480 router. Mixing of AC supplies and DC supplies may damage your chassis. [PR/233340]

MX480 AC Power Supply LEDs

Each AC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 1). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED on the craft interface.

Table 1: AC Power Supply LEDs
Label	Color	State	Description
AC OK	Yellow	Off	AC power input voltage is below 78 VAC.
AC OK	Green	On	AC power input voltage is within 78–264 VAC.
DC OK	Green	Off	DC power outputs generated by the power supply are not within the normal operating ranges.
DC OK	Green	On	DC power outputs generated by the power supply are within the normal operating ranges.
PS FAIL	Red	Off	Power supply is functioning normally.
PS FAIL	Red	On	Power supply is not functioning normally and its output voltage is out of regulation limits. Check AC OK and DC OK LEDs for more information.

AC Electrical Specifications for the MX480 Router

Table 2 lists the AC power supply electrical specifications; Table 3 lists the AC power system specifications.

Table 2: AC Power Supply Electrical Specifications
Item	Specification
Normal-Capacity Power Supplies
Maximum output power	1027 W (low line) 1590 W (high line)
AC input voltage	Operating range: 100 – 240 VAC (nominal)
AC input line frequency	50 to 60 Hz (nominal)
AC input current rating	11.0 A @ 200 VAC or 14.5 A @ 110 VAC maximum
Efficiency Note: This value is at full load and nominal voltage.	85% (low line and high line)
High-Capacity Power Supplies
Maximum output power	1167 W (low line) 2050 W (high line)
AC input voltage	Operating range: 100 – 240 VAC (nominal)
AC input line frequency	50 to 60 Hz (nominal)
AC input current rating	16 A @ 110 VAC maximum 15.1 A @ 200 VAC maximum
Efficiency Note: This value is at full load and nominal voltage.	84% (low line) 89% (high line)

Table 3: AC Power System Specifications
Item	Normal Capacity–Low Line	Normal-Capacity–High Line	High-Capacity–Low Line	High-Capacity–High Line
Redundancy	3+1	2+2	3+1	2+2
Output power (maximum) per power supply	1027 W	1590 W	1167 W	2050 W
Output power (maximum) per system	3081 W	6400 W	3501 W	4100 W

AC Power Circuit Breaker Requirements for the MX480 Router

Each AC power supply has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. We recommend that you use a customer site circuit breaker rated for 15 A (250 VAC) minimum for each AC power supply, or as required by local code. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure.

AC Power Cord Specifications for the MX480 Router

Each AC power supply 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 router. An AC power cord connects each power supply to the power distribution panel.

You can order detachable AC power cords, each approximately 8 ft (2.5 m) long that supply AC power to the router. The C19 appliance coupler end of the cord inserts into the AC appliance inlet coupler, type C20 (right angle) as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source receptacle that is standard for your geographical location.

Table 4 provides specifications and Figure 3 depicts the plug on the AC power cord provided for each country or region.

Table 4: AC Power Cord Specifications
Country	Model Number	Electrical Specification	Plug Type
Australia	CBL-M-PWR-RA-AU	240 VAC, 50 Hz AC	SAA/3/15
China	CBL-M-PWR-RA-CH	220 VAC, 50 Hz AC	CH2-16P
Europe (except Denmark, Italy, Switzerland, and United Kingdom)	CBL-M-PWR-RA-EU	220 or 230 VAC, 50 Hz AC	CEE 7/7
Italy	CBL-M-PWR-RA-IT	230 VAC, 50 Hz AC	CEI 23-16/VII
Japan	CBL-PWR-RA-JP15	125 VAC, 50 or 60 Hz AC	JIS 8303
Japan	CBL-M-PWR-RA-JP	220 VAC, 50 or 60 Hz AC	NEMA L6-20P
North America	CBL-PWR-RA-US15	125 VAC, 60 Hz AC	NEMA 5-15P
	CBL-PWR-RA-TWLK-US15	125 VAC, 60 Hz AC	NEMA L5-15P
	CBL-M-PWR-RA-US	250 VAC, 60 Hz AC	NEMA 6-20
	CBL-M-PWR-RA-TWLK-US	250 VAC, 60 Hz AC	NEMA L6-20P
United Kingdom	CBL-M-PWR-RA-UK	240 VAC, 50 Hz AC	BS89/13

Figure 3: AC Plug Types

Warning:

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

Warning:

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

Note:

In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) 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). You can order AC power cords that are in compliance.

Warning:

The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) 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.

CAUTION:

Power cords and cables must not block access to device components or drape where people could trip on them.

ON THIS PAGE

MX480 AC Power Supply Description

AC Power Supply Configurations

MX480 AC Power Supply LEDs

AC Electrical Specifications for the MX480 Router

See Also

AC Power Circuit Breaker Requirements for the MX480 Router

AC Power Cord Specifications for the MX480 Router

See Also