Juniper MX240 - Figure 75: Connecting Power Cables to the DC Power Supply

CAUTION: The maximum torque rating of the terminal studs on the DC
power supply is 36 lb-in. (4.0 Nm). The terminal studs may be damaged
if excessive torque is applied. Use only a torque-controlled driver or socket
wrench to tighten nuts on the DC power supply terminal studs.
Figure 75: Connecting Power Cables to the DC Power Supply
5. Verify that the DC power cable is connected correctly, that it does not touch or block
access to router components, and that it does not drape where people could trip on
it.
6. Replace the clear plastic cover over the terminal studs on the faceplate.
7. Attach the power cable to the DC power source.
8. Turn on the dedicated customer site circuit breaker to the power supply.
9. Verify that the INPUT OK LED on the power supply is lit steadily.
10. On each of the DC power supplies, switch the DC circuit breaker to the center position
before moving it to the on (—) position.
NOTE: The circuit breaker may bounce back to the off (O) position if you
move the breaker too quickly.
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MX240 3D Universal Edge Router Hardware Guide