Juniper MX204 Hardware Guide

Table 15: DC Power Supply Electrical Specifications
SpecificationItem
650 WMaximum output power
Minimum: –40 VDC
Nominal: –48 VDC, –60 VDC
Operating range: –40 to –72 VDC
DC input voltage
20 A @ –44 VDCDC input current rating
SEE ALSO
Maintaining the MX204 Power Supplies | 126
Replacing an MX204 DC Power Supply | 130
DC Power Circuit Breaker Requirements for the MX204 Router
Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated circuit breaker.
We recommend that you use a dedicated customer-site circuit breaker rated for 25 A (–48 VDC) minimum,
or as required by local code. Doing so enables you to operate the router in any configuration without
upgrading the power infrastructure.
If you plan to operate a DC-powered router at less than the maximum configuration and do not provision
a 25 A (–48 VDC) circuit breaker, we recommend that you provision a dedicated customer-site circuit
breaker for each DC power supply rated for at least 125 percent of the continuous current that the system
draws at –48 VDC.
SEE ALSO
Replacing an MX204 DC Power Supply | 130
Power Consumption for a DC-Powered MX204 Router | 72
General Safety Guidelines and Warnings | 147
General Electrical Safety Guidelines and Warnings | 172
43

Juniper MX204 Specifications

General

Cooling type	Active
Product color	Gray
Rack capacity	1U
Rack mounting	Yes
Number of fans	3 fan(s)
AC input voltage	100 - 240 V
Number of power supply units	2
Operating altitude	0 - 1828 m
Operating temperature (T-T)	0 - 55 °C
Operating relative humidity (H-H)	5 - 90 %

Weight and Dimensions

Depth	475 mm
Width	447 mm
Height	44.5 mm
Weight	10500 g