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Calculating DC Power Requirements for MX2008 Routers
NOTE:
The MX2008, MX2010, and MX2020 routers support the same power modules (AC/DC
PSMs and AC/DC PDMs).
The information in this topic helps you determine which PSMs are suitable for various configurations, as
well as which PSMs are not suitable because output power is exceeded. You determine suitability by
subtracting the total power draw from the maximum output of the PSMs. Afterward, you calculate the
required input current. Finally, you calculate the thermal output. A sample configuration is provided in
Table 95 on page
223.
We recommend that you provision power according to the maximum input current listed in the power
system electrical specifications (see
page 117
and
"DC Power (240 V China) Circuit Breaker Requirements for the MX2000 Router" on page
Use the following procedures to calculate the power requirement:
1. Calculate the power requirement.
2. Evaluate the power budget.
3. Calculate input power.
4. Calculate thermal output (BTUs) for cooling
Requirements for the MX2000 Router" on page
"MX2008 DC Power (-48 V) System Electrical Specifications" on
requirements."DC Power (240 V China) Circuit Breaker
120.
222
120).
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