Appendix D M320 Router Power Guidelines, Requirements, And Specifications; Table 27: Component Power Requirements - Juniper M320 Hardware Manual

Copyright © 2010, Juniper Networks, Inc.
Appendix D: M320 Router Power Guidelines, Requirements, and Specifications

Table 27: Component Power Requirements

Component
Base system, not including FPCs and PICs (includes four
SIBs, one host subsystem, two power supplies, cooling
system running at normal speed, and craft interface)
Type 1 FPC (without PICs)
Type 2 FPC (without PICs)
Type 3 FPC (without PICs)
Host subsystem (Routing Engine and CB)
SIB
AC power supply
DC power supply
Cooling system (normal speed)
Cooling system (full speed)
PIC—Generalized typical value
PIC—Generalized maximum value
You can use the information in Table 27 on page 251 and the M320 Multiservice Edge Router
PIC Guide 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.
Example of calculating power consumption for minimum configuration:
Base system + 1 FPC + 1 PIC =
9.4 A + 3.3 A + 0.625 A = 13.3 A @ –48 VDC = 638 W DC
Example of calculating power consumption for maximum configuration:
Base system + 1 Host subsystem + 2 redundant DC power supplies + 8 FPCs + 32 PICs
=
9.4 A + 2.1 A + 2(0.8) A + 8(3.3 A) + 32(1.1 A) =
9.4 A + 2.1 A + 1.6 A + 26.4 A + 35.2 A = 74.7 A @ –48 VDC =3,586 W DC
Current requirement adjustment for fans running at full speed (high temperature
environment or cooling component failure):
Calculated system current (X) – Cooling (normal) + Cooling (full speed) =
X A – 2.9 A + 4.0 A =
Current
Power Requirement
Requirement (Amps @
(Watts) –48 VDC)
450 W 9.4 A
(approximate) (approximate)
160 W 3.3 A
160 W 3.3 A
160 W 3.3 A
100 W 2.1 A
38 W 0.8 A
100 W Not applicable.
40 W 0.8 A
140 W 2.9 A
200 W 4.0 A
30 W 0.625 A
52.8 W 1.1 A
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