Juniper MX104 Hardware Manual page 72

MX104 3D Universal Edge Router Hardware Guide
56
Secure each power cable lug to the terminal with the washers and screw (see
6.
Figure 18 on page 57). Apply 27.4 lb-in. (3.1 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 return (
b. Secure the negative DC source power cable lug to the input (
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 it is improperly threaded may damage the terminal.
CAUTION: The maximum torque rating of the terminal screws on the DC
power supply is 27.4 lb-in. (3.1 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 27.4 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 plastic cover over the terminals on the faceplate.
7.
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.
Repeat Step 2 through Step
10.
Observe the LED on the power supply. The LED blinks green as it transitions online. If
11.
the power supply is functioning normally, the LED lights green steadily.
If the LED is red or not lit, the power supply is not functioning normally. Repeat the
cabling procedures.
9 for the remaining power supply.
Copyright © 2014, Juniper Networks, Inc.
) terminal.
+
– ) terminal.