Juniper MX480 - Replacing an MX480 DC Power Supply Cable; Disconnecting an MX480 DC Power Supply Cable

4. Verify that the power cord does not block the air exhaust and access to router
components, or drape where people could trip on it.
5. Attach the power cord to the AC power source, and switch on the dedicated customer
site circuit breaker for the power supply. Follow the ESD and connection instructions
for your site.
6. Switch the AC input switch on the each power supply to the on (—) position and
observethe status LEDs on the power supply faceplate. If the powersupply is correctly
installed and functioning normally, the AC OK and DC OK LEDs light steadily, and the
PS FAIL LED is not lit.
See Also Preventing Electrostatic Discharge Damage to an MX480 Router on page 484•
• Replacing an MX480 AC Power Supply on page 367
• Disconnecting an MX480 AC Power Supply Cord on page 376
• AC Electrical Specifications for the MX480 Router on page 139
Related
Documentation
Preventing Electrostatic Discharge Damage to an MX480 Router on page 484•
• Replacing an MX480 AC Power Supply on page 367
• AC Electrical Specifications for the MX480 Router on page 139
Replacing an MX480 DC Power Supply Cable
1.
Disconnecting an MX480 DC Power Supply Cable on page 377
2.
Connecting an MX480 DC Power Supply Cable on page 378
Disconnecting an MX480 DC Power Supply Cable
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the off position, and tape the switch handle of the circuit breaker
in the off position.
To disconnect a power cable for a DC power supply:
1. Switch off the dedicated customer site circuit breaker for the power supply being
removed. Follow your site's procedures for ESD.
2. Make sure that the voltage across the DC power source cable leads is 0 V and that
there is no chance that the cables might become active during the removal process.
377Copyright © 2017, Juniper Networks, Inc.
Chapter 26: Replacing Power System Components