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T640 DC Power Supply Electrical Specifications

 

Use a customer site circuit breaker for each power supply input. We recommend that you provision a circuit breaker for each DC power supply input rated for at least 125% of the continuous current that the input draws at –48 VDC, or as required by local code.

Table 1 lists the power supply electrical specifications for the two-input 160-A DC power supply.

Table 1: T640 Two-Input 160-A DC Power Supply Electrical Specifications

Item

Specification

DC input voltage

Nominal –48 VDC, –60 VDC

Operating range: –40.5 to –72 VDC

Note: If the input voltage from the DC power source drops below –40.5 VDC, the router automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –42.75 VDC, the router automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.

Input DC current rating

68 A @ –48 VDC (nominal) for each input (3264 W)

Table 2 lists the power supply electrical specifications for the three-input 240-A DC power supply in 2–INPUT mode.

Table 2: T640 Three-Input 240-A DC Power Supply Electrical Specifications

Item

Specification

DC input voltage

Nominal –48 VDC, –60 VDC

Operating range: –40.0 to –72.0 VDC

Note: If the input voltage from the DC power source drops below –37.5 to –39.5 VDC, the router automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43.0 to –44.00 VDC, the router automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.

Input DC current rating

Input 0: 67 A @ –48 VDC (nominal) (3216 W)

Input 1: 67 A @ –48 VDC (nominal) (3216 W)

Note: For a T640 router, do not use INPUT 2 on a three-input 240-A DC power supply.

Table 3 lists the power supply electrical specifications for the four-input 240-A DC power supply.

Table 3: Four-Input 240-A DC Power Supply Electrical Specifications

Item

Specification

DC input voltage

Nominal –48 VDC, –60 VDC

Operating range: –40.0 to –72.0 VDC

Note: If the input voltage from the DC power source drops below -37.5 to -39.5 VDC, the router automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43.0 to –44.00 VDC, the router automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.

Input DC current rating

Input 0: 47 A @ –48 VDC (nominal) (2256 W)

Input 1: 44 A @ –48 VDC (nominal) (2112 W)

Input 2: 50 A @ –48 VDC (nominal) (2400 W)

Input 3: 50 A @ –48 VDC (nominal) (2400 W)

Table 4 lists the six-input DC power supply electrical specifications.

Table 4: Six-Input DC Power Supply Electrical Specifications

Item

Specification

DC input voltage

Nominal –48 VDC, –60 VDC

Operating range: –40.0 to –72.0 VDC

Note: If the input voltage from the DC power source drops below -37.5 to -39.5 VDC, the router automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43.0 to –44.00 VDC, the router automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.

Input DC current rating

Input 0: 45 A @ –48 VDC (nominal) (2160 W)

Input 1: 56 A @ –48 VDC (nominal) (2448 W)

Input 2: 56 A @ –48 VDC (nominal) (2448 W)

Input 3: 56 A @ –48 VDC (nominal) (2448 W)

Input 4: 56 A @ –48 VDC (nominal) (2448 W)

Input 5: 56 A @ –48 VDC (nominal) (2448 W)