Mx2020 Power Midplane Description; Mx2000 Three-Phase Delta Ac Power Distribution Module Description - Juniper MX2020 Hardware Manual

MX2020 DC Power Requirements | 193
Maintaining the Power Supply Modules on the MX2000 Line of Routers | 418
Troubleshooting the MX2000 Router Power System | 686

MX2020 Power Midplane Description

The MX2020 power subsystem consists of a power midplane (PMP). This midplane is used to connect
power from the PDM feeds (AC or DC) to the input of the PSMs (AC or DC) as well as the output from
the PSMs to the FRUs (MPCs, CB-REs, SFBs, and Fan Trays). The power midplane plugs into the signal
backplane. The PSMs and PDMs get plugged into the power midplane.
RELATED DOCUMENTATION
MX2020 Universal Edge Router Overview | 3
MX2020 Chassis Description | 6
MX2020 Modular Port Concentrator (MPC) Description | 76
MX2000 Switch Fabric Board (SFB) Overview | 63
MX2000 Host Subsystem CB-RE Description | 49
MX2000 Modular Interface Card (MIC) Description | 65
MX2020 Backplane Description | 12

MX2000 Three-Phase Delta AC Power Distribution Module Description

Each three-phase delta AC power distribution module (PDM) weighs approximately 12 lb (5.44 kg). A metal
wiring compartment contains two AC terminal blocks and ground labeled GND. One AC terminal block
consists of three input terminals that serves six power supply modules (PSMs) and the second terminal
block serves three PSMs. The terminal block on the left is labeled A1, B1, and C1 (bottom to top). The
second terminal block on the right is labeled A2, B2, and C2 (bottom to top). The PDMs are located at the
rear of the chassis in slots PDM0/Input0 through PDM1/Input1, (bottom to top). LEDs provide the status
of the PDM. Figure 35 on page 97
NOTE: The three-phase delta AC PDM terminal blocks will be flipped depending on which slot
the PDM gets plugged into.
shows the three-phase delta AC PDM.
96