Technical Documentation
T320 Power Requirements
Table 1 lists the power requirements for various hardware components when the router is operating under typical voltage conditions. For PIC power requirements, see the T320 Core Router PIC Guide.
Table 1: Component Power Requirements
Component | Current Requirement (Amps @ –48 VDC) |
|---|---|
Base system, not including FPCs and PICs (includes three SIBs, one host subsystem, one SCG, two power supplies, cooling system, and craft interface | 9 A |
SIB | 0.8 A |
Type 1 FPC (without PICs) | 3.3 A |
Type 2 FPC (without PICs) | 3.3 A |
Type 3 FPC (without PICs) | 3.3 A |
Host subsystem (Routing Engine and control board) | 2.6 A |
SCG | 0.2 A |
Power supply | 0.8 A |
Cooling system (normal speed) | 1.7 A |
Cooling system (full speed) | 4.5 A |
- Power consumption for minimum configuration:Base System + 1 FPC3 + 2 PICs =9 A + 3.3 A + 2(0.625) A = 13.6 A @ –48 VDC = 653 W
- Power consumption for maximum configuration:Base System + 8 FPC3 + 1 Host + 1 SCG + 16 PICs =9 A + 8(3.3 A) + 2.6 A + 0.2 A + 16(0.625 A) =9 A + 26.4 A + 2.6 A + 0.2 A + 10 A = 48.2 A @ –48 VDC = 2,314 W
- Current requirement adjustment for fans running at full
speed (high temperature environment or cooling component failure):Calculated system current (X) – Cooling (normal) + Cooling (full speed) =X A – 1.7 A + 4.5 A = X A + 2.8 A
- Input current from a DC source other than –48 VDC
(based on maximum configuration):(–54 VDC input) x (input current X) = (–48 VDC) x (input current Y)54 x X = 48 x 48.2X = 48 x 48.2/54 = 42.8 A
- System thermal output for maximally configured router:Watts DC/0.293 = BTU/hr2314/0.293 = 7,898 BTU/hr
Published: 2011-12-19
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