Juniper MX5 Hardware Manual page 123

Copyright © 2019, Juniper Networks, Inc.
Disconnecting an MX5, MX10, MX40, and MX80 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:
Switch off the dedicated customer site circuit breaker for the power supply being
1.
removed. Follow your site's procedures for ESD.
Make sure that the voltage across the DC power source cable leads is 0 V and that
2.
there is no chance that the cables might become active during the removal process.
Verify that the status LED on the power supply is not lit.
3.
Remove the power cable from the external DC power source.
4.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
5.
ESD points on the chassis.
Move the DC circuit breaker on the DC power supply faceplate to the off (
6.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
7.
Remove the screw from each of the terminals. (Use a number 2 Phillips screwdriver.)
8.
Remove the cable lugs from the terminals.
9.
Carefully move the power cables out of the way.
10.
Chapter 4: Maintaining Components
O ) position.
123