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Router
Power Requirements
Table 16 lists the power requirements for
various hardware components when the router is operating under typical voltage
conditions. For PIC power requirements, see the M160 Internet Router PIC 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 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)
=
- 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
 |
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.
|
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