Table 37: Component Power Requirements - Juniper TX MATRIX Hardware Manual

TX Matrix Hardware Guide
340

Table 37: Component Power Requirements

Component
Base system (includes five TX-SIBs, one host subsystem, one
TX-CIP, two power supplies, cooling system at normal speed, and
craft interface)
TX-SIB
Host subsystem (Routing Engine and TX-CB)
TX-CIP
Cooling system (normal speed)
Cooling system (full speed)
Craft interface
You can use the information in Table 37 on page 340 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 A
X = 48 x 62 A/54 = 55 A
System Current
Requirement (Amps @
–48 VDC)
59.7 A
10.0 A
2.6 A
0.1 A
6.7 A
22.0 A
0.2 A
Copyright © 2010, Juniper Networks, Inc.