Juniper MX2010 Hardware Manual page 125

NOTE: The three-phase wye AC PDM terminal blocks will be flipped depending on which slot
the PDM gets plugged into.
Figure 35: Three-Phase Wye AC Power Distribution Module
Figure 36 on page 104 shows the three-phase wye AC PDM connections.
CAUTION:
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 MX Series chassis is not sensitive to phase rotation
sequence—either CW or CCW will operate correctly.
The three-phase wye AC PDM must be installed and secured in the chassis
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