Juniper MX480, Руководство по оборудованию

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NOTE: An SCB must be present for the PWR OK LED to go on.
Table 19: DC Power Supply LEDs
Description State Color Label
Power supply is not functioning normally. Check the INPUT OK LED for more
information.
Off Green PWR OK
Power supply is functioning normally. On
The main output voltage is out of range (lower limit: 37.5 V to 39.5 V; upper limit:
72.5 V to 76 V). On Yellow
DC power supply circuit breaker is turned off. Off Green
BRKR ON
DC power input is present and the DC power supply circuit breaker is turned on. On
DC input to the PEM is not present. Off Green INPUT OK
DC input is present and is connected in correct polarity. On
DC input is present, but not in valid operating range or connected in reverse polarity. On Yellow
DC Power Supply Electrical Specifications for the MX480 Router
Table 20 on page 55 lists the DC power supply electrical specifications.
Table 21 on page 56 lists the DC power system specifications.
Table 20: Power Supply Electrical Specifications
Specification Item
Normal-Capacity Power Supplies
1600 W Maximum output power
33.3 A @ –48 V nominal operating voltage DC input current rating
40 A Maximum Input Current
Operating Range: –40.5 VDC to –72 VDC
Nominal: –48 VDC
DC input voltage
~98% Efficiency
NOTE: This value is at full
load and nominal voltage.
40 A Internal Circuit Breaker
55 Copyright © 2019, Juniper Networks, Inc.
Chapter 1: Overview