Juniper MX2020 Hardware Guide

three-phase feeds to be connected. Each phase from each of the two feeds is distributed among one or
two PSMs. One feed has each phase going to two PSMs, and the other feed has each phase going to a
single PSM. The single-phase AC PDM provides an AC input connection from the single-phase AC power
source, and also provides an input power interface to the PSM through a system power midplane. Each
AC input is independent and feeds one PSM.
Figure 8 on page 17 and Figure 9 on page 17 illustrate the power distribution from the three-phase
delta and wye PDMs to the AC PSMs.
Figure 8: Power Distribution from Three-Phase Feed Delta PDM to the AC PSMs
g007085
AC PS_0
2800W
input
AC PS_3
2800W
input
AC PS_1
2800W
input
AC PS_4
2800W
input
AC PS_2
2800W
input
AC PS_5
2800W
input
A1
B1
AC PS_8
2800W
input
A2
B2
C2
AC PS_6
2800W
input
AC PS_7
2800W
input
C1
Figure 9: Power Distribution from Three-Phase Feed Wye PDM to the AC PSMs
g007086
AC PS_0
2800W
input
AC PS_3
2800W
input
AC PS_2
2800W
input
AC PS_5
2800W
input
A1
B1
C1
AC PS_1
2800W
input
AC PS_4
2800W
input
NE1
C2
NE2
AC PS_6
2800W
input
A2
B2
AC PS_7
2800W
input
AC PS_8
2800W
input
17

Juniper MX2020 Specifications

General

Brand	Juniper
Model	MX2020
Category	Network Router
Language	English