Juniper MX2020 Hardware Manual page 233

Table 75: MX2020 DC Power Zoning (Base DC Power Implementations)
Chassis Power
Configuration Power Zone
DC power to lower Lower (zone 0)
half of MX2020
components
DC power to upper Upper (zone 1)
half of MX2020
components
Zone 0 + Zone 1
As illustrated in Figure 77 on page 211
DC optimized power subsystems distribute power to FRUs as follows:
Zone 0 powers only line card slots 1-7, and fan trays 0 and 1
Zone 1 powers only line card slots 10-16, and fan trays 2 and 3
Zone 0 and Zone 1 (both zones provide power) to CB-RE slot 0 and CB-RE slot 1, and fabric card slots
0-7
Figure 77: Power Distribution in an Optimized DC Power Subsystem
Power
Distribution
Module (PDM)
PDM 0 and 1
PDM 2 and 3
and described in Table 76 on page
Power Supply Components Receiving
Module (PSM) Power
PSM slots 0 MPC slots 0 through 9
through 8
Fan Tray 1
PSM slots 9 MPC slots 10 through
through 17 19
Fan Tray 3
CB-RE slot 0 and slot 1
SFB slots 0 through 7
Fan tray 0 and 2
212, the power zones in MX2020
211