Juniper MX5 Hardware Manual page 121

Copyright © 2019, Juniper Networks, Inc.
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
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you are tightening the screws. Ensure that each
screw is properly threaded into the terminal. Applying installation torque
to the screw when improperly threaded may result in damage to the
terminal.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the
terminal studs on each power supply.
NOTE: For information about connecting to DC power sources, see
MX10, MX40, and MX80 Routers DC Power Specifications" on page
Replace the clear plastic cover over the terminals on the faceplate.
8.
Verify that the power cabling is correct, that the cables are not touching or blocking
9.
access to router components, and that they do not drape where people could trip on
them.
On each of the DC power supplies, switch the DC circuit breaker to the center position
10.
before moving it to the on ( ) position.
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Chapter 4: Maintaining Components
Figure 55 on page 122).
(return) terminal.
RTN
(input) terminal.
–48V
and to indicate
(+) (–)
"MX5,
39.
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