Table 68: Mx2020 Dc Power Zoning - Juniper MX2020 Hardware Manual

Copyright © 2015, Juniper Networks, Inc.
The MX2020 DC power subsystem is made up of two sub zones where each sub zone
provides power to half of the FRUs in the chassis (see
on power zoning). Each power subsystem is made up of two DC PDMs, nine PSMs, twenty
MPCs (ten MPCs powered by one power zone and the remaining ten MPCs powered by
the second power zone), two fan trays within the same power zone and one fan tray
powered by the other power zone, eight SFBs, and two Control Board and Routing Engines
(CB-REs).
When calculating power requirements, be sure that there is adequate power for each
zone.
NOTE: Four DC PSMs per zone are mandatory for the MX2020 router with
DC PDMs.

Table 68: MX2020 DC Power Zoning

Chassis Power
Configuration Power Zone
DC power to Lower (zone 0)
lower half of
MX2020
components
DC power to Upper (zone 1)
upper half of
MX2020
components
NOTE: When a PSM is switch off, the software will indicate that the PSM is
present, but not turned on.
The following sample configuration shows an MX2020 chassis with:
Four DC PDMs
Twenty 16-port 10GbE MPCs with SFP+ interfaces (slots 0 through 19)
Two CB-REs (with one redundant CB-RE) (CB-RE slot 0 and CB-RE slot 1)
Eight SFBs (with one redundant SFB) (SFB slots 0 through 7)
Twenty ADCs (slots 0 through 19)
Chapter 14: DC Power Requirements, Specifications, and Guidelines
Table 68 on page 181
Power
Power Supply
Distribution Module
Module (PDM) (PSM)
PDM 0 and 1 PSM slots 0
through 8
PDM 2 and 3 PSM 9
through 17
for information
Components
Receiving Power
MPC slots 0
through 9
CB-RE slot 0 and
slot 1
SFB slots 0
through 7
Fan tray 0, 1, 2
MPC slots 10
through 19
CB-RE slot 0
through slot 1
SFB slot 0 through
7
Fan tray 0, 2, 3
181