T1600 Three-Input 240-A DC Power Supply Overview
T1600 Three-Input 240-A DC Power Supply Description
Each three-input 240-A DC power supply weighs approximately 25 lb. (11.3 kg) and consists of three inputs, three 80-A circuit breakers, a fan, and LEDs to monitor the status of the power supply. Figure 1 shows the three-input 240-A DC power supply.
Figure 1: Three-Input 240-A DC Power Supply
T1600 Three-Input 240-A DC Power Supply Inputs
The three-input 240-A DC power supply inputs are labeled INPUT 0, INPUT 1, and INPUT 2, from top to bottom. Each input consists of –48 VDC and return—each with its own 80-A circuit breaker. The input mode switch on the faceplate allows you to set the DC power supply to either 2-INPUT or 3-INPUT mode. 3-INPUT mode is required for the T1600 Core Router.
Table 1 describes which components are powered by each input.
Table 1: Components Powered by Each Three-Input 240-A DC Power Supply Input
| Input | Three-Input Mode |
|---|---|
INPUT 0 | SIBs, control boards, fan trays, and Routing Engines |
INPUT 1 | FPCs in slots FPC4 through FPC7 |
INPUT 2 | FPCs in slots FPC0 through FPC3 |
T1600 Three-Input 240-A DC Power Supply Load Sharing and Fault Tolerance
When the T1600 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. Table 2 describes the behavior of the power supply if one of the inputs fails.
Table 2: Fault Tolerance in Three-Input Mode
| Input | Three-Input Mode |
|---|---|
INPUT 0 | If this input fails, INPUT 0, INPUT 1, and INPUT 2 shut down. The power supply shuts down, and the other power supply assumes the electrical load for all three inputs. |
INPUT 1 | If this input fails, INPUT 0 is unaffected and INPUT 1 and INPUT 2 shut down. The other power supply assumes the electrical load of INPUT 1 and INPUT 2. |
INPUT 2 | If this input fails, INPUT 0 is unaffected and INPUT 1 and INPUT 2 shut down. The other power supply assumes the electrical load of INPUT 1 and INPUT 2. |
