TX Matrix DC Power Requirements
Table 1 lists the system current requirements for various hardware components when the TX Matrix router is operating under typical voltage conditions.
Table 1: Component Power Requirements
Component | System Current Requirement (Amps @ –48 VDC) |
|---|---|
Base system (includes five TX-SIBs, one host subsystem, one TX-CIP, two power supplies, cooling system at normal speed, and craft interface) | 59.7 A |
TX-SIB | 10.0 A |
Host subsystem (Routing Engine and TX-CB) | 2.6 A |
TX-CIP | 0.1 A |
Cooling system (normal speed) | 6.7 A |
Cooling system (full speed) | 22.0 A |
Craft interface | 0.2 A |
You can use the information in Table 1 to calculate power consumption for various hardware configurations, input current from a different source voltage, and thermal output, as shown in the following examples.
- Power consumption for minimum configuration:Base System =59.7 A @ –48 VDC = 2866 W
- Power consumption for maximum configuration:Base System + 1 Host =59.7 A + 2.6 A = 62 A @ –48 VDC = 2976 W
Note: The power system rating is 4560 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 – 6.7 A + 22 A = X A + 15.3 A
- Low line maximum input current for maximum configuration:Input 0 of PEM (lower input): 60 A @ –42 VDC (with fans running at high speed)Input 1 of PEM (upper input): 37.5 A @ –42 VDC
- 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 62 AX = 48 x 62 A/54 = 55 A
- System thermal output for maximally configured TX Matrix
router:Watts DC/0.293 = BTU/hr2976 W/0.293 = 10,157 BTU/hr
