Connecting Power to a T640 Router with Three-Input 240-A DC Power Supplies
1.
Setting the Input Mode Switch on a Three-Input 240-A DC Power Supply on page 24
2.
Replacing the Cable Restraint on a Three-Input 240-A DC Power Supply
(Optional) on page 25
3.
Connecting the DC Power Cables on page 27
Setting the Input Mode Switch on a Three-Input 240-A DC Power Supply
NOTE: Do not set the input mode switch if the power supply is installed in
the chassis. If the power supply is already installed, you must disconnect all
cables and remove the power supply before setting the input mode switch.
To set the input mode switch (see Figure 11 on page 25):
1. Using a screwdriver, loosen the captive screw holding the metal cover over the input
mode switch (see Figure 11 on page 25).
2. Rotate the metal cover away from the input mode switch to expose the switch.
3. Check the setting of the input mode switch. Use a flashlight, if necessary. In 2-INPUT
mode, the switch must be positioned all the way to the right.
4. If the input mode switch is not set correctly, use a sharp, nonconductive object to slide
the switch all the way to the right to set the power supply to 2-INPUT mode.
CAUTION: Do not use a pencil, because fragments can break off and cause
damage to the power supply.
5. Rotate the metal cover over the input mode switch, and use a screwdriver to tighten
the captive screw.
Copyright © 2015, Juniper Networks, Inc.24
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