Supplies - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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Connecting DC Power to a T640 Router with Two-Input 160-A DC Power Supplies
144
AC-powered router:
Phillips (+) screwdriver, number 2 to access the metal AC wiring compartment
1/4-in. slotted screwdriver or 5/32-in (4-mm) Allen wrench to attach the ground
wire and input terminal wires of the AC power cord.
NOTE: The terminal connections have either slotted screws or hex screws.
Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in
(4-mm) Allen wrench for the 5/16-in hex screws.
Electrostatic discharge (ESD) grounding wrist strap
Connecting DC Power to a T640 Router with Two-Input 160-A DC Power Supplies on
page 144
Connecting DC Power to a T640 Router with Three-input 240-A DC Power Supplies
(2-INPUT Mode) on page 146
Connecting DC Power to a T640 Router with Four-Input 240-A DC Power Supplies on
page 148
Connecting DC Power to the T640 Router (Six 60-A Inputs to Six-Input DC Power
Supplies) on page 150
Connecting DC Power to the T640 Router (Five 60-A Inputs to Six-Input DC Power
Supplies) on page 154
Connecting DC Power to the T640 Router (Four 60-A Inputs to Six-Input DC Power
Supplies) on page 158
Connecting AC Power to a T640 Router with Three-Phase Wye AC Power Supplies on
page 165
Connecting AC Power to a T640 Router with Three-Phase Delta AC Power Supplies
on page 163
T640 General Electrical Safety Guidelines and Electrical Codes on page 404
To connect the DC source power cables to each power supply in the T640 router:
Switch off the dedicated customer site circuit breakers. Follow the instructions for
1.
your site. Ensure that the voltage across the DC power source cable leads is 0 V and
that there is no chance that the cable leads might become active during installation.
Switch the circuit breakers on the power supply faceplate to the off position (
2.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
3.
Remove the nut and washer from each power terminal stud. If no washers and nuts
4.
are already installed, they should be in the accessory box.
O
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