Power Consumption for a DC-Powered SRX5800 Services Gateway

We recommend that you provision at least 116 A  (58 A per feed) @ –48 VDC (nominal) for the system.

If you do not plan to provision at least 116 A  (58 A per feed) @ –48 VDC (nominal) for the system, you can use the information in Table 40 and Table 41 to calculate the power consumption @ –48 VDC and thermal output for your hardware configuration.

Table 40 lists the power requirements for base DC-powered services gateways operating under typical voltage conditions and includes nonredundant and redundant power supply configurations.

Note: The base DC-powered services gateway includes the midplane, craft interface, and fan trays running at normal speed.

Table 40: DC Base Services Gateway Power Requirements

DC Power Supply Configuration

Power Requirement (Watts)

Current Requirement (Amps @ –48 VDC)

Nonredundant DC configuration includes two DC power supplies, the midplane, craft interface, and fan trays running at normal speed.

400 W (approximate)

8.3 A (approximate)

Redundant DC configuration includes four DC power supplies, the midplane, craft interface, and fan trays running at normal speed.

400 W (approximate)

8.3 A (approximate)

Table 41: Component DC Power Requirements

Component

Power Requirement (Watts)

Current Requirement (Amps @ –48 VDC)

SCB

150 W

3.1 A

Routing Engine

90 W

1.9 A

Cooling system (full speed – normal speed)

600 W – 400 W = 200 W

4.2 A

IOC—Generalized typical value

312 W

6.5 A

IOC—Generalized maximum value

365 W

7.6 A

SPC—Generalized typical value

213 W

4.4 A

SPC—Generalized maximum value

351 W

7.3 A

These examples use generalized values for DPCs.

Typical power consumption for DC-powered devices:

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