Dc Power Circuit Breaker Requirements For The Mx204 Router - Juniper MX204 Hardware Manual

Table 15: DC Power Supply Electrical Specifications
Item
Maximum output power
DC input voltage
DC 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
Specification
650 W
Minimum: –40 VDC
Nominal: –48 VDC, –60 VDC
Operating range: –40 to –72 VDC
20 A @ –44 VDC
43