Juniper MX204 Hardware Manual page 88

MX204 3D Universal Edge Router Hardware Guide
102
Secure each power cable lug to the terminal with the screw (see
6.
Apply between 5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm) of torque to the screw. Do not
overtighten the screw (use a socket nut driver).
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 can 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.
Replace the clear plastic cover over the terminals on the faceplate.
7.
Verify that the power cabling is correct, that the cables do not touch or block access
8.
to router components, and that they do not drape where people could trip on them.
Attach the power cable to the DC power source, and switch on the dedicated
9.
customer-site circuit breaker. Follow the instructions for your site.
NOTE: If more than one power supply is being installed, turn on all power
supply modules at the same time.
Observe the status LED on the power supply faceplate. If the power supply is correctly
10.
installed and functioning normally, the status LED lights green steadily.
Figure 51 on page
(return) terminal.
RTN
–48V (input) terminal.
and to indicate
(+) (–)
Copyright © 2018, Juniper Networks, Inc.
103).