Dc Power Circuit Breaker Requirements For The Mx240 Router; Table 38: Power System Specifications - Juniper MX240 Hardware Manual

Table 37: Power Supply Electrical Specifications (continued)

Table 38: Power System Specifications

Item Normal-Capacity
Redundancy 1+1
Output power 1600 W
(maximum) per
supply
Output power 1600 W
(maximum) per
system
Related
Documentation

DC Power Circuit Breaker Requirements for the MX240 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 40 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.
For high-capacity power supplies, we recommend that you use a dedicated customer
site circuit breaker rated for 60 A or 70A, or as required by local code,depending on the
input switch setting.
Copyright © 2013, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the MX240 Router
Item Specification
Maximum Input Current 60 A (DIP=0)
Maximum output power 2400 W
DC input current rating 50 A @ -48 VDC normal operating
voltage
DC input voltage Operating Range: –40.5 VDC to –72 VDC
Nominal: –48 VDC
Efficiency
NOTE: This value is at full
load and nominal voltage.
High-Capacity
1+1
60 A (DIP=0)
2400 W
2400 W
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power
Supplies on page 104
Installing an MX240 DC Normal Capacity Power Supply on page 212
Disconnecting an MX240 DC Power Supply Cable on page 216
Calculating Power Requirements for MX240 Routers on page 261
~98%
70 A (DIP=1)
2600 W
2600 W
70 A (DIP=1)
2600 W
54.2 A @ -48 VDC normal operating
voltage
277