Step 7: Powering On the T640 Router
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Powering On the DC-Powered Router on page 39
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Powering On the AC-Powered Router on page 41
Powering On the DC-Powered Router
To power on the router:
1. Verify that the power supplies are fully inserted in the chassis and that the captive
screws on their faceplates are tightened.
2. Verify that the DC power cables are connected to the appropriate terminal —the
positive (+) source cable to the return terminal (labeled RTN) and the negative (–)
source cable to the input terminal (labeled -48V).
3. Verify that an external management device is connected to one of the Routing Engine
ports on the CIP (AUXILIARY or CONSOLE).
NOTE: The management Ethernet port will not be functional until you
have completed the initial configuration.
4. Turn on the power to the external management device.
5. Switch on the customer site circuit breakers to provide power to the DC power source
cable leads.
6. For a three-input 240-A DC power supply and six-input DC power supply, verify that
the INPUT PRESENT LED is lit steadily, indicating that the power supply is receiving
power.
NOTE: The two-input 160-A power supply does not have an INPUT
PRESENT LED.
7. For two-input 160-A DC power supplies, three-input 240-A DC power supplies, or
four-input 240-A DC power supplies, switch the circuit breakers on one of the power
supplies to the on position (|).
For six-input power supplies, switch the power switch on one of the power supplies
to the ON position (—). The DC OK LED blinks momentarily, then lights steadily.
NOTE: The Routing Engine boots as the power supply completes its startup
sequence.
8. For a two-input 160-A DC power supply, three-input 240-A DC power supply, or
four-input 240-A DC power supply, verify that the CB ON LED is lit steadily.
39Copyright © 2015, Juniper Networks, Inc.
Step 7: Powering On the T640 Router
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