Juniper ACX2000 Quick Start Manual page 13

Copyright © 2016, Juniper Networks, Inc.
The cable with very large resistance (indicating an open circuit) to chassis ground
is .
–48V
The cable with very low resistance (indicating a closed circuit) to chassis ground is
RTN .
Remove the screws and flat washers from the terminals.
4.
Secure each power cable lug to the terminal with the flat washers and screw (see
5.
Figure 8 on page 14). Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque
to each screw. Do not overtighten the screw. (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: The maximum torque rating of the terminal screws on the DC
power supply is 9 lb-in. (1.02 Nm). The terminal screws may be damaged
if excessive torque is applied. Use only a torque-controlled driver to tighten
screws on the DC power supply terminals. Use an appropriately-sized
driver, with a maximum torque capacity of 9 lb-in. or less. Ensure that the
driver is undamaged and properly calibrated and that you have been
trained in its use. You may wish to use a driver that is designed to prevent
overtorque when the preset torque level is achieved.
Replace the clear plastic cover over the terminals on the faceplate.
6.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
7.
the strap to an approved site ESD grounding point. See the instructions for your site.
Connect each DC power cable to the appropriate external DC power source.
8.
NOTE: For information about connecting to external DC power sources,
see the instructions for your site.
Switch on the external circuit breakers to provide voltage to the DC power source
9.
cable leads. Observe the system LED on front of the router. If the DC power cable is
correctly installed and functioning normally, the system LED lights green steadily. If
the status LED indicates that the power supply is not functioning normally, repeat the
installation and cabling procedures.
Connect Power Cables
RTN (return) terminal.
(input) terminal.
–48V
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