Connecting An Mx240 Dc Power Supply Cable - Juniper MX240 Hardware Manual

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Connecting an MX240 DC Power Supply Cable

Copyright © 2017, Juniper Networks, Inc.
Route the power cord appropriately. Verify that the power cord does not block the air
4.
exhaust and access to router components, or drape where people could trip on it.
Switch the AC input switch on the each power supply to the on (
5.
the status LEDs on the power supply faceplate. If the power supply is correctly installed
and functioning normally, the
LED is not lit.
Disconnecting an MX240 AC Power Supply Cord on page 338
Preventing Electrostatic Discharge Damage to an MX240 Router on page 444
AC Power Cord Specifications for the MX240 Router on page 140
MX240 AC Power Electrical Safety Guidelines and Warnings
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 connect a power cable for a DC power supply:
Locate a replacement power cable that meets the specifications.
1.
Verify that a licensed electrician has attached a cable lug to the replacement power
2.
cable.
Verify that the
3. INPUT OK
Secure the power cable lug to the terminal studs, first with the flat washer, then with
4.
the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each
nut (see Figure 75 on page
torque-controlled driver or socket wrench.)
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you are tightening the nuts. Ensure that each nut
is properly threaded onto the terminal stud. The nut should be able to spin
freely with your fingers when it is first placed onto the terminal stud.
Applying installation torque to the nut when improperly threaded may
result in damage to the terminal stud.
Chapter 17: Connecting the MX240 Router to Power
and LEDs light steadily, and the
AC OK DC OK
LED is off.
208). Do not overtighten the nut. (Use a 7/16-in. [11 mm]
| ) position and observe
PS FAIL
207