Juniper Networks MX240 DC-Powered Base Router Power Requirements, Component Power Requirements

MX240 Ethernet Services Router Hardware Guide

power supply configurations. The base DC-powered router includes the midplane, craft interface, and fan tray running at normal speed.

Table 30: DC-Powered Base Router Power Requirements

		Current
	Power	Requirement
	Requirement	(Amps @
DC Power Supply Configuration	(Watts)	–48 VDC)
One DC power supply (nonredundant configuration)	50 W	1.04 A
	(approximate)	(approximate)
Two DC power supplies (redundant configuration)	66 W	1.38 A
	(approximate)	(approximate)

Table 31 on page 168 lists the power requirements for various hardware components when the router is operating under typical voltage conditions.

Table 31: Component Power Requirements

		Current
		Requirement
		(Amps @
Component	Power Requirement (Watts)	–48 VDC)
SCB	150 W	3.1 A
Routing Engine	90 W	1.9 A
Fan tray (full speed) – Fan tray (normal	70 W – 50 W = 20 W	0.4 A
speed)
DPC—Generalized typical value	312 W	6.5 A
DPC—Generalized maximum value	365 W	7.6 A

These examples use generalized values for DPCs. For DPC power requirements, see the MX-series Ethernet Services Router DPC Guide.

Typical power consumption for DC-powered routers:

■Minimum DC-powered configuration:

Base router (with fan tray at normal speed and one power supply) + 1 SCB + 1

Routing Engine + 1 DPC =

1.04A +3.1 A + 1.9 A + 6.5 A = 12.5 A @ –48 VDC = 600.0 W DC

■Maximum DC-powered configuration with one host subsystem and a third DPC in the multifunction slot:

Base router and two power supplies + fan tray at full speed + 1 SCB + 1 Routing

Engine + 3 DPCs

168■ DC Power Specifications and Requirements