Table 32: Dc-Powered Base Router Power Requirements For The Mx5, Mx10; Table 33: Component Power Requirements For Dc-Powered Routers - Juniper MX10 Hardware Manual

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Table 32: DC-Powered Base Router Power Requirements for the MX5,
MX10, MX40, and Modular MX80 Router
Modular Chassis Configuration
Chassis running at high activity, with four 10-Gigabit
Ethernet XFPs, two MICs, and fans running at high speed
Table 33 on page 61 lists the power requirements for various hardware components
when the router is operating under typical voltage conditions.

Table 33: Component Power Requirements for DC-Powered Routers

Component
MIC (generalized value)
These examples show how to calculate typical power consumption for your DC-powered
router configuration. The examples use generalized values for MICs. For exact MIC power
requirements, see the MX Series Interface Module Reference
Typical power consumption for modular DC-powered routers:
Active DC-powered router with one MIC:
Base router (high activity, with four 10-Gigabit Ethernet XFPs, and fans running at high
speed) + 1 MIC =
5 A + 0.73 A = 5.73 A @ –48 VDC = 275 W DC
Active DC-powered router with two MICs:
Base router (high activity, with four 10-Gigabit Ethernet XFPs, and fans running at high
speed) + 2 MICs
5 A + 2(0.73 A) = 6.46 A @ –48 VDC = 310 W DC
Input current from a DC source other than –48 VDC (based on maximum configuration;
applies to DC power supply only):
(–54 VDC input) * (input current X) = (–48 VDC input) * (input current Y)
54 * X = 48 * 13 A
X = 48 * 13 A/54 = 11.5 A
Example of calculating system thermal output:
Watts DC * 3.41 = BTU/hr
500 * 3.41 = 1,705 BTU/hr
MX5, MX10, MX40, and MX80 Power System Description on page 35
Maintaining the MX5, MX10, MX40, and MX80 Power Supplies on page 161
Chapter 9: DC Power Specifications and Requirements
Power
Requirement
(Watts)
310 W
Power Requirement
(Watts)
35 W
.
Current
Requirement
(Amps @
–48 VDC)
6.5 A
(approximate)
Current
Requirement
(Amps @
–48 VDC)
0.73 A
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