Replacing An M120 Dc Power Supply Cable - Juniper M120 Hardware Manual

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Replacing an M120 DC Power Supply Cable

Copyright © 2010, Juniper Networks, Inc.
Carefully pull the AC power cords through the cable restraint until you have the desired
11.
amount of slack in the power cord.
Tighten the cable restraint retainer screw to hold the power cords in place.
12.
Insert the power cord plugs into an AC power source receptacle. Verify that the power
13.
cord does not block access to router components or drape where people could trip
on it.
NOTE: Each AC power supply has two AC appliance inlets. Each power
supply must be connected to a dedicated AC power feed. For 100-120
VAC, both inlets are used. For 200-240 VAC, only the top inlet is used. For
information about site power preparations, see "M120 Router Power
Requirements" on page 237. For information about connecting the router
to power and ground, see "Connecting Power to an AC-Powered M120
Router" on page 89.
Switch the power switch on the power supply faceplate to the on position (
14.
that the status LED on the power supply faceplate blinks, then lights steadily
approximately one minute after you switch on the power switch.
M120 AC Power Supply Description on page 29
Maintaining the M120 Power Supplies on page 115
Electrical Specifications for the M120 AC Power Supply on page 230
To replace a power cable for a DC power supply:
Locate a replacement power cable that meets the specifications defined in "M120 DC
1.
Power, Connection, and Cable Specifications" on page 234.
CAUTION: A licensed electrician must attach a cable lug to the power
cable that you supply. A cable with an incorrectly attached lug can damage
the router (for example, by causing a short circuit).
Make sure that the voltage across the DC power source cable leads is 0 V and that
2.
there is no chance that the cables might become active during the removal process.
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 the power supply faceplate.
Chapter 14: Replacing M120 Hardware Components
(+) and
). Verify
|
(–) to indicate
183