Juniper MX240 Hardware Manual page 392

Figure 138: 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.
Observe the status LEDs on the power supply faceplate. If the power supply is correctly installed and
functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily.
SEE ALSO
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