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Calculating PTX3000 Power Consumption

Power Requirements for PTX3000 Components

Table 1 lists the output power requirements for the required and optional FRUs for the PTX3000. The power requirements vary depending on the ambient air temperature for your installation.

Table 1: Power Requirements for PTX3000 Components

Component

Typical Output Power Requirement

Maximum Output Power Requirement

Base system with SIB-SFF-PTX-240 SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB-SFF-PTX-240 SIBs)

730 W

1555 W

Base system with SIB3-SFF-PTX SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB3-SFF-PTX SIBs)

826 W

1600 W

Base system with SIB3-SFF-PTX SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB3-SFF-PTX SIBs)

826 W

1600 W

Base System Components

Fan tray

120 W (typical speed)

450 W (higher speed)

Craft interface

4.8 W

4.8 W

Host subsystem (Control Board and Routing Engine)

95 W

110 W

SIB-SFF-PTX-240

43.3 W

60 W

SIB3-SFF-PTX

54 W

65 W

SIB3-SFF-PTX

54 W

65 W

FPCs

FPC-SFF-PTX-P1-A

200 W

270 W

FPC-SFF-PTX-T

200 W

270 W

FPC3-SFF-PTX

250 W

300 W

PICs

P1-PTX-24-10GE-SFPP

60 W

70 W

P1-PTX-24-10G-W-SFPP

82 W

115 W

P1-PTX-2-40GE-CFP

27 W

35 W

P3-24-U-QSFP28

110 W

167 W

P1-PTX-2-100GE-CFP

70 W

75 W

P1-PTX-2-100G-WDM

250 W

280 W

IPLCs

PTX-IPLC-B-32

50 W

75 W

PTX-IPLC-E-32

1 W

3 W

Calculating Power Consumption for your Configuration

By using the information in Table 1, you can calculate the power consumption for your configuration.

Note:

PTX3000 AC and DC power supply module (PSM) efficiency is approximately 90% at full load and nominal voltage. The power supply efficiency is used to calculate the input power in the calculations below.

Note:

In the examples below, a base system is defined as described in Table 1.

  • Example of calculating typical power consumption for a minimum configuration using an FPC-SFF-PTX-P1-A FPC and SIB-SFF-PTX-240 SIBs:

  • Example of calculating typical power consumption for a maximum configuration using FPC-SFF-PTX-P1-A FPCs and SIB-SFF-PTX-240 SIBs:

  • Example of calculating maximum power consumption for a maximum configuration using FPC-SFF-PTX-P1-A FPCs and SIB-SFF-PTX-240 SIBs:

  • Example of calculating typical power consumption for a minimum configuration using an FPC3-SFF-PTX FPC and SIB3-SFF-PTX SIBs:

  • Example of calculating typical power consumption for a maximum configuration using FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs:

  • Example of calculating maximum power consumption for a maximum configuration using FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs:

Calculating System Thermal Output

After you have calculated the power consumption for your configuration, you can use that information to determine the system thermal output (BTUs per hour). To do so, multiply the power consumption in watts by 3.41.

For example, above we calculated the power consumption for a redundant base configuration with FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs to be 6051 W. Using that information we can calculate the system thermal output for the configuration: