b. Insert the negative (–) source cable into the input terminal, which is labeled –48V.
11. Verify that the DC source power cabling cabling is correct, that the DC power cables
are not touching or blocking access to router components, and that they do not drape
where people could trip on them.
12. Turn on the DC power source so that voltage flows to the power supply.
13. Press the switch on the power supply faceplate to the ON ( | ) position.
NOTE: After powering on a power supply, wait at least 60 seconds before
turning it off.
14. If the M7I has only one power supply or the router is completely powered off when
you power on the power supply, the Routing Engine boots as the power supply
completes its startup sequence. If the Routing Engine finishes booting and you need
to power off the router again, see “Powering Off the M7i Router” on page 126.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
15. Check the LEDs on the power supply faceplate. When the power supply has powered
on successfully, the green OUTPUT OK LED lights steadily.
After a power supply is powered on, it can take up to 60 seconds for status
indicators—such as the output status LED on the power supply, the command display
output, 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.
Figure 63: Installing a DC Power Supply
See Also DC Power Electrical Safety Warnings for Juniper Networks Devices on page 256•
Copyright © 2019, Juniper Networks, Inc.174
M7i Multiservice Edge Router Hardware Guide
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