Juniper Networks MX240 manual Power Consumption for DC-Powered Routers

Appendix D: Power Guidelines, Requirements, and Specifications

DC Power System Electrical Specifications

Table 28 on page 167 lists the DC power system electrical specifications.

Table 28: DC Power System Electrical Specifications

Item	Specification
DC input voltage	Operating range: –40.5 to –72 VDC
DC system current rating	31 A @ –48 VDC per input (maximum)
DC system input power	29.58 A @ –48 VDC (1,420 W DC)

DC Power Supply Electrical Specifications

Table 29 on page 167 lists the DC power supply electrical specifications.

Table 29: DC Power Supply Electrical Specifications

Item	Specification
Maximum output power	1600 W
DC input voltage	Minimum: –40.5 VDC
	Nominal: –48 VDC, –60 VDC
	Operating range: –40.5 to –72 VDC
DC input current rating	33.3 A @ –48 VDC
Internal supplementary	40 A
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Power Consumption for DC-Powered Routers

NOTE: If you plan to operate a maximally configured DC-powered router, we recommend that you provision at least 31 A @ –48 VDC per input for each power supply.

If you do not plan to provision at least 31 A @ –48 VDC per input for each power supply, you can use the information in Table 30 on page 168 and Table 31 on page 168 to calculate the power consumption @ –48 VDC and thermal output for your hardware configuration.

Table 30 on page 168 lists the power requirements for base AC-powered routers operating under typical voltage conditions and includes nonredundant and redundant

DC Power Specifications and Requirements ■ 167