Installing An Mx5, Mx10, Mx40, And Mx80 Dc Power Supply; Figure 65: Disconnecting The Dc Power Cables - Juniper MX10 Hardware Manual

Installing an MX5, MX10, MX40, and MX80 DC Power Supply

Copyright © 2017, Juniper Networks, Inc.

Figure 65: Disconnecting the DC Power Cables

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 install a DC power supply (see
Ensure that the voltage across the DC power source cable leads is 0 V and that there
1.
is no chance that the cable leads might become active during installation.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
2.
ESD points on the chassis.
Switch the DC circuit breaker on the DC power supply faceplate to the off (
3.
Using both hands, slide the power supply straight into the chassis until the power
4.
supply is fully seated in the chassis slot. The power supply faceplate should be flush
with any adjacent power supply faceplate or blank installed in the power supply slot.
Remove the clear plastic cover protecting the terminal on the faceplate.
5.
Remove the screws from the terminals.
6.
Secure each power cable lug to the terminal with the screw (see
7.
Apply between 5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm) of torque to screw. Do not
overtighten the nut. (Use a number 2 Phillips screwdriver.)
a. Secure the positive (+) DC source power cable lug to the
b. Secure the negative (–) DC source power cable lug to the
Chapter 20: Replacing Power System Components
Figure 62 on page 142):
) position.
O
Figure 63 on page 142).
(return) terminal.
RTN
(input) terminal.
–48V
145