Table 33: Component Power Requirements - Juniper M120 Hardware Manual

Copyright © 2010, Juniper Networks, Inc.
Appendix D: Power Guidelines, Requirements, and Specifications for the M120 Router

Table 33: Component Power Requirements

Component
Cooling system (normal speed)
Cooling system (full speed)
AC power supply
DC power supply
FEB
Type 1 FPC (without PICs)
Type 2 FPC (without PICs)
Type 3 FPC (without PICs)
CFPCs
CB (and craft interface)
Routing Engine 1000
Routing Engine 2000
You can use the information in Table 33 on page 239 to calculate power consumption for
various hardware configurations, input current from a different source voltage, and
thermal output, as shown in the following examples for a DC-powered router. These
examples use generalized values for PICs. For PIC power requirements, see the M120 PIC
Guide.
Power consumption for minimum configuration:
Cooling system (normal speed) + 1 host subsystem with RE1000 + 1 Type 1 FPC + 1 FEB
+ 1 Type 1 PIC =
3.90 A + 1.52 A + 0.69 A + 1.79 A + 0.56 A = 8.46 A @ –48 VDC = 406 W DC
Power consumption for maximum DC-powered configuration :
Cooling system (high speed) + 2 host subsystems with RE2000 + 2 CFPC + 4 Type 2
FPCs + 6 FEBs + 16 Type 2 PICs =
5.11 A + 2 (1.48 A + .78 A) + 2 (1.12) + 4(0.92 A) + 6(1.79 A) + 16(1.05 A) =
5.11 A + 4.52 A + 2.24 A + 3.68 A + 10.74 A + 16.8 A = 43.09 A @ –48 VDC = 2,068 W DC
System thermal output for maximally configured DC-powered router:
Watts DC * 3.41 = BTU/hr
2,068 * 3.41 = 7052 BTU/hr
DC Current
DC Power Requirement
Requirement (Amps @
(Watts) –48 VDC)
187 W 3.90 A
245 W 5.11 A
114 W Not applicable
17 W 0.35 A
86 W 1.79 A
27 W 0.56 A
44 W 0.92 A
34 W 0.72 A
54 W 1.12 A
38 W 0.78 A
35 W 0.74 A
71 W 1.48 A
239