Juniper MX2020 Quick Start Manual page 49

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Figure 33: Three-Phase Delta AC Power Cord

NOTE:

The three-phase delta AC PDM terminal blocks will be flipped

depending on which slot the PDM gets plugged into.

CAUTION:

Wire label configuration is for Juniper Networks supplied cable

only. If you are using your own cable, make sure that you use the proper

connections.

To connect wires to the terminal block that serves three PSMs:

a. Insert the grounding wire into the grounding point labeled

b. Insert the wire labeled

c. Insert the wire labeled

d. Insert the wire labeled

WARNING:

To protect power supplies from input voltage that might be

caused by miswired PDMs, before reinstalling the metal cover to the wiring

compartment apply AC voltage to the PDM (with disengaged PSM) to

make sure that two LEDs on the PDM are lit green and that the AC voltage

between AC terminal blocks A1-B1, B1-C1, C1-A1, A2-B2, B2-C2, and C2-A2

for three-phase delta PDM is not more than 264VAC when measured with

a digital voltage meter (DVM). Then turn off the AC breaker, de-energizing

the PDM, and install the metal cover and engage all AC PSMs.

NOTE:

The color of each AC power wire might vary.

Connect Power to a Three-Phase Delta AC Power Distribution Module

into the input terminal labeled

GND

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