Mx480 Network Cable And Transceiver Planning; Calculating Power Budget And Power Margin For Fiber-Optic Cables; Table 87: Calculating Thermal Output - Juniper MX480 Hardware Manual

MX480 Universal Routing Platform Hardware Guide

Table 87: Calculating Thermal Output

Power Supply
MX480 AC Normal-capacity (high-line)
MX480 AC High-capacity (high-line)
MX480 DC Normal-capacity
MX480 DC High-capacity
See Also

MX480 Network Cable and Transceiver Planning

Calculating Power Budget and Power Margin for Fiber-Optic Cables

162
1
These values are at full load and nominal voltage.
2
For this configuration, total power is 1090 W.
3
Zone 0 requirement.
Calculate thermal output (BTUs). To calculate this, multiply the input power
4.
requirement (in watts) by 3.41.
1
Zone 0 output.
AC Electrical Specifications for the MX480 Router on page 47
DC Power Supply Electrical Specifications for the MX480 Router on page 55
Calculating Power Budget and Power Margin for Fiber-Optic Cables on page 162
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion on page 164
Routing Engine Interface Cable and Wire Specifications for MX Series Routers on page 166
Use the information in this topic and the specifications for your optical interface to
calculate the power budget and power margin for fiber-optic cables.
TIP: You can use the
the pluggable transceivers supported on your Juniper Networks device.
To calculate the power budget and power margin, perform the following tasks:
Calculating Power Budget for Fiber-Optic Cable on page 163
1.
Calculating Power Margin for Fiber-Optic Cable on page 163
2.
Thermal Output (BTUs per hour)
1282 * 3.41 = 4372 BTU/hr
1225 * 3.41 = 4177 BTU/hr
1
1112 * 3.41 = 3792 BTU/hr
1
1112 * 3.41 = 3792 BTU/hr
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