Internet Router Hardware Guide

M160 Internet Router Hardware Guide
Table 16: Component Power Requirements
Component Power Requirement (Amps)
Base system (cooling system, power supplies, and craft
interface)
7-1 0 A/48 V
Hostmodule(RoutingEngineandMCS) 1.3A/48V
FPC
2.4A/48V
PCG
0.2A/48V
SFM
1.3A/48V
You can use the information in Table 16 and the M160 Internet 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 an added safety margin, the examples use
a generalized value for PICs of 0.625 A/48 V each.)
Power consumption for minimum configuration:
Base system + 1 FPC + 1 SFM + 1 host module + 2 PCGs + 4 PICs =
7 A + 2.4 A + 1.3 A + 1.3 A + 2(0.2 A) + 4(0.625 A) =
7 A + 2.4 A + 1.3 A + 1.3 A + 0.4 A + 2.5 A = 14.9 A @ 48 V = 715 W DC
Power consumption for maximum configuration:
Base system + 8 FPCs + 4 SFMs + 2 host modules + 2 PCGs + 32 PICs =
10 A + 8(2.4 A) + 4(1.3 A) + 2(1.3 A) + 2(0.2 A) + 32(0.625 A) =
10A + 19.2A + 5.2A + 2.6A + 0.4A + 20A=57.4A@48V=2755WDC
Input current from a DC source other t han 48 V (based on maximum
configuration):
(54 VDC input) x (input current X) = (48 VDC input) x (input current Y)
54 x X = 48 x 57.4 A
X=48 x 57.4A/54=51.0A
System thermal output for maximally configured router:
105% of Watts DC/0.293 = BTU/hr
1.05 x 2755/0.293 = 9873 BTU/hr
NOTE: If you plan to operate a maximally configured router, we recommend that
you provision at least 70 A @ 48 VDC and use a facility circuit breaker rated for
70 A minimum. Doing so enables you to operate the router in any configuration
without upgrading the pow er infrastructure, and allows the r outer to function at
full capacity using one power supply.
If you plan to operate the router at less than the maximum configuration and do not
provision a 70 A circuit breaker, we recommend that you provision a circuit breaker
rated for at least 125% of the continuous current that the system draws at 48 V.
66 Power Guidelines, Requirements, and Specifications