Dc Power Supply Leds - Juniper MX-series MX960 Installation Instructions Manual

Table 1: DC Power Supply Electrical Specifications

DC Power Supply LEDs

Each DC power supply faceplate contains three LEDs that indicate the status of the
power supply (see Table 2 on page 3). The power supply status is also reflected in
two LEDs on the craft interface (see the MX960 Ethernet Services Router Hardware
Guide). In addition, a power supply failure triggers the red alarm LED on the craft
interface.
Table 2: DC Power Supply LEDs
Label Color
Green
PWR OK
Green
BREAKER
ON
Green
INPUT OK
Amber
Item Specification
Maximum output power 2800 W
DC input voltage Minimum: 40 VDC
Nominal: 48 VDC
Operating range: 40 to 72 VDC
NOTE: If the input voltage from the DC power source drops below
-37.5 to -39.5 VDC, the routing platform automatically shuts down.
During automatic shutdown, the circuit remains active. When the
input voltage returns to 43.0 to 44.00 VDC, the router
automatically starts up again and the system returns to normal
operation within 30 minutes. No operator intervention is required.
DC input current rating 70 A maximum @ 48 VDC (nominal operating voltage)
Internal Supplementary 80 A
Protector
State Description
Off
Power supply is not functioning normally. Check the
information.
On Power supply is functioning normally.
Off DC power supply circuit breaker is turned off.
On DC power supply circuit breaker is turned on.
Off DC input to the PEM is not present.
On DC input is present, and is connected in correct polarity.
On DC input is present, but connected in reverse polarity.
DC Power Supply
INPUT OK LED for more
3
DC Power Supply