M160 Internet Router Hardware Guide
Table 16: Component Power Requirements
Component
Power Requirement (Amps)
Base system (cooling system, power supplies, and craft
interface)
7-10 A/48 V
Host module (Routing Engine and MCS)
1.3 A/48 V
FPC
2.4 A/48 V
PCG
0.2 A/48 V
SFM
1.3 A/48 V
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 1 FPC + 1 SFM + 1 host 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 8 FPCs + 4 SFMs + 2 host m 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)
=
10 A + 19.2 A + 5.2 A + 2.6 A + 0.4 A + 20 A = 57.4 A @ 48 V = 2755 W DC
Input current from a DC source other than 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 57.4 A/54 = 51.0 A
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 power infrastructure, and allows the router 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
Содержание Internet Router M160
Страница 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Страница 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Страница 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Страница 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Страница 26: ...2 Product Overview ...
Страница 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Страница 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Страница 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Страница 82: ...58 Initial Installation ...
Страница 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Страница 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Страница 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Страница 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Страница 244: ...220 Appendixes ...
Страница 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Страница 301: ...Part 5 Index Index 277 ...
Страница 302: ...278 Index ...