Figure 188: Installing A Four-Input 240-A Dc Power Supply - Juniper T640 Hardware Manual

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Replace the clear plastic cover over the terminal studs on the faceplate.
15.
Switch on the customer site circuit breakers to provide voltage to the DC power source
16.
cables.
Verify that the INPUT PRESENT
17.
indicating that the inputs are receiving power.
Switch the circuit breakers on the power supply to the
18.
NOTE: After a power supply is powered on, it can take up to 60 seconds
for status indicators—such as the LEDs on the power supply, the command
output displays, and messages on the LED display on the craft interface—to
indicate that the power supply is functioning normally. Ignore error
indicators that appear during the first 60 seconds.
Verify that the LEDs on the power supply faceplate are lit steadily, indicating
19. CB ON
that the circuit breakers are on.
Verify that the LED on the power supply faceplate is lit steadily, indicating that
20. DC OK
the power supply is correctly installed and is functioning properly. The
blinks momentarily, then lights steadily.

Figure 188: Installing a Four-Input 240-A DC Power Supply

T640 Power System Description on page 95
T640 Four-Input 240-A DC Power Supply Description on page 102
T640 Four-Input 240-A DC Power Supply LEDs on page 103
Troubleshooting the T640 Power System on page 476
LEDs on the power supply faceplate are lit steadily,
ON
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position ( | ).
LED
DC OK