Juniper Networks MX960 DC Power Supply LEDs, DC Power Supply Electrical Specifications

DC Power Supply

Table 1: DC Power Supply Electrical Specifications

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

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	State	Description
PWR OK	Green	Off	Power supply is not functioning normally. Check the INPUT OK LED for more
			information.
		On	Power supply is functioning normally.
BREAKER	Green	Off	DC power supply circuit breaker is turned off.
ON
		On	DC power supply circuit breaker is turned on.
INPUT OK	Green	Off	DC input to the PEM is not present.
		On	DC input is present, and is connected in correct polarity.
	Amber	On	DC input is present, but connected in reverse polarity.

DC Power Supply ■ 3