Description; Figure 19: Three-Phase Wye Ac Power Distribution Module - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
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MX2020 Three-Phase Wye AC Power Distribution Module Description
Each three-phase wye AC PDM weighs approximately 8.0 lb (3.62 kg). A metal wiring
compartment contains two AC terminal blocks and ground labeled
block consists of three input terminals that serves six PSMs and the second terminal
block serves three PSMs. The terminal block on the far left is labeled
(bottom to top). The second terminal block is labeled
The PDMs are located at the rear of the chassis in slots
to top). LEDs provide the status of the PDM.
wye AC PDM.
NOTE: The three-phase wye AC PDM terminal blocks will be flipped
depending on which slot the PDM gets plugged into.

Figure 19: Three-Phase Wye AC Power Distribution Module

Figure 20 on page 45 shows the three-phase wye AC PDM connections.
NOTE: The three-phase wye AC PDM must be installed and secured in the
chassis before connecting the power input cables. If the PDM must be
removed, both input power cables must be uninstalled and removed from
the PDM before the PDM can be removed from the chassis. The MX2020
chassis is not sensitive to phase rotation sequence—either CW or CCW will
operate correctly.
GND
A1
, , , and
A2 B2 C2 N2
through
PDM0
Figure 19 on page 44 shows the three-phase
Copyright © 2013, Juniper Networks, Inc.
. One AC terminal
, B1 , C1 , and N1
(bottom to top).
, (bottom
PDM3