Table 25: MX2020 AC Power Components (continued)
DescriptionComponent
The MX2020 supports connection of a single-phase or three-phase (delta
or wye) AC PDM. Four AC PDM models are available: three-phase delta,
three-phase wye, seven-feed single-phase, and nine-feed single-phase.
•
Each three-phase AC PDM requires two 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. The
single-phase AC PDMs accept seven or nine AC power cords from
a single-phase AC source.
•
Each AC input is independent and feeds one PSM. Up to nine PSMs
can be connected through the AC PDM.
AC Power Distribution Modules (PDMs)
The MX2020 AC PSMs are hot-removable and hot-insertable. The AC
PSMs have a dual redundant feed (INP0 and INP1). One input feed is
active during operation. These feeds are set by the input mode DIP switch
located on the AC PSM (see MX2020 AC Power Supply Module Description).
Each AC PSM works with a single phase derived from either three-phase
delta 200-240 VAC (line-to-line) or three-phase wye 200-240 VAC
(line-to-neutral). Each AC PSM is capable of delivering 2500 W of power.
AC Power Supply Modules (PSMs)
The MX2020 router supports the power system models and Junos OS releases in Table 26 on page 94.
Table 26: Supported MX2020 Power System Components
Junos ReleaseModel NumberName
12.3R2 and laterMX2000-PSM-DCDC PSM (-48 V)
18.2R1 and laterMX2K-PSM-DC-240VDC PSM (240-V China)
18.2R1 and laterMX2K-PDM-DC-240VNine-feed DC PDM (240-V China)
12.3R2 and laterMX2000-PDM-DCNine-feed DC PDM (-48 V)
15.1R1 and laterMX2K-PDM-OP-DCSeven-feed DC PDM (-48 V)
12.3R2 and laterMX2000-PSM-ACAC PSM
94
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