Juniper MX10008, Руководство по оборудованию

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JNP10K-PWR-DC power supplies can use the standard power bus or the enhanced power bus. All MX10016
chassis ship with the enhanced power bus; to determine whether an MX10008 has the standard or enhanced
power bus, see “MX10008 Status Panel LEDs” on page 39 .
Each JNP10K-PWR-DC power supply weighs approximately 6 lb (2.7 kg) and has two independent pairs
of DC input lugs (Input 1, RTN, –48V/–60V and Input 2, RTN, –48V/–60V) on the faceplate of the power
supply. Each inlet requires a dedicated DC power feed. Although each inlet provides sufficient input power
to provide full output, always connect to a dedicated DC power feed to provide redundancy. Only one
power feed is operational at a time.
DC power models employ electronic A-B input selection. It provides 2n source redundancy and n+1 power
supply redundancy using fewer power supplies than you would require in a 2n configuration. Should one
power source fail, electronic A-B input selection routes the power supply to the alternate source.
Each JNP10K-PWR-DC power supply has a power switch with international markings for on (|) and off
(O), a fan, and four LEDs on the faceplate that indicate the status of the power supply. See
Figure 31 on page 67 .
Figure 31: JNP10K-PWR-DC Power Supply
NOTE: The JNP10K-PWR-DC power supply requires a dedicated circuit breaker for each input
DC feed. The chosen breaker should be sized to deliver 60 A of input current.
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