Dc Power Specifications; Table 54: Component Power Requirements - Juniper Core Router T Series Hardware Manual

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Table 54: Component Power Requirements

Component
Base system, not including FPCs and PICs
(includes three SIBs, one host subsystem, one
SCG, two power supplies, cooling system, and
craft interface
SIB
Type 1 FPC (without PICs)
Type 2 FPC (without PICs)
Type 3 FPC (without PICs)
Host subsystem (Routing Engine and control
board)
SCG
Power supply
Cooling system (normal speed)
Cooling system (full speed)
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 48.2
X = 48 x 48.2/54 = 42.8 A
System thermal output for maximally configured router:
Watts DC/0.293 = BTU/hr
2314/0.293 = 7,898 BTU/hr
Chapter 10: DC Power Specifications
Current Requirement (Amps @ –48 VDC)
9 A
0.8 A
3.3 A
3.3 A
3.3 A
2.6 A
0.2 A
0.8 A
1.7 A
4.5 A
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