Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

T1600 Four-Input 240-A DC Power Supply Description

 

Four-Input 240-A DC Power Supply

Each four-input 240-A DC power supply weighs approximately 26.6 lb (12.0 kg) and consists of four inputs, four 60-A circuit breakers, a fan, and LEDs to monitor the status of the power supply. Figure 1 shows the four-input 240-A DC power supply.

Figure 1: Four-Input 240-A DC Power Supply
Four-Input 240-A DC
 Power Supply

Four-Input 240-A DC Power Supply Inputs

The four-input 240-A DC power supply inputs are labeled INPUT 0, INPUT 1, and INPUT 2, and INPUT 3 from top to bottom. Each input consists of –48 VDC and return, each with its own 60-A circuit breaker.

Table 1 describes which components are powered by each input.

Table 1: Components Powered by Each Four-Input 240-A DC Power Supply Input

InputComponents

INPUT 0

SIBs, control boards, Routing Engines, and half the system fan power

INPUT 1

FPCs in slots FPC0 and FPC1 and half the system fan power

INPUT 2

FPCs in slots FPC2 through FPC4

INPUT 3

FPCs in slots FPC5 through FPC7

Four-Input 240-A DC Power Supply Load Sharing and Fault Tolerance

When the router is operating normally and both power supplies are switched on, load sharing between them occurs automatically. When one power supply fails or is turned off, the other power supply immediately assumes the entire electrical load for the system. A single power supply can provide full power for as long as the router is operational. If any of the four inputs fails, the router shuts down, and the other power supply assumes the electrical load for all four inputs.