Dc Power Circuit Breaker Requirements For The Mx240 Router; Mx240 Chassis Grounding Specifications; Table 82: Calculating Thermal Output - Juniper mx240 Hardware Manual

MX240 3D Universal Edge Router Hardware Guide

Table 82: Calculating Thermal Output

Power Supply
MX240 AC Normal-capacity (high-line)
MX240 AC High-capacity (high-line)
MX240 DC Normal-capacity
MX240 DC High-capacity
Related
Documentation

DC Power Circuit Breaker Requirements for the MX240 Router

Related
Documentation

MX240 Chassis Grounding Specifications

154
Power Requirements for an MX240 Router on page 130
AC Power Supply Electrical Specifications for the MX240 Router on page 129
DC Power Supply Electrical Specifications for the MX240 Router on page 143
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.
If you plan to operate a DC-powered router at less than the maximum configuration and
do not provision a 40 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%
of the continuous current that the system draws at –48 VDC.
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power
Supplies on page 197
Installing an MX240 DC Normal Capacity Power Supply on page 248
DC Power Disconnection Warning for M Series, MX Series, and T Series Routers
DC Power Source Cabling for the MX240 Router on page 157
DC Power Cable Specifications for the MX240 Router on page 158
MX240 Chassis Grounding Points Specifications on page 155
MX240 Router Grounding Cable Lug Specifications on page 156
MX240 Router Grounding Cable Specifications on page 156
Thermal Output (BTUs per hour)
1747 * 3.41 = 5957 BTU/hr
1669 * 3.41 = 5576 BTU/hr
1515 * 3.41 = 5166 BTU/hr
1515 * 3.41 = 5166 BTU/hr
Copyright © 2016, Juniper Networks, Inc.