M7I Ac Power Supply - Juniper M7I Hardware Manual

M7i Multiservice Edge Router Hardware Guide
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M7i AC Power Supply

22
mechanism. The enable pin disables the voltage at the output connector if the power
supply is not turned off before removal.
Power supplies are hot-removable and hot-insertable, as described in "M7I
Field-Replaceable Units (FRUs)" on page 85. To avoid electrical injury, carefully follow
the instructions in "Replacing an M7i AC Power Supply" on page 106 and "Replacing a DC
Power Supply" on page 111.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on. After powering on a power supply, wait at least 60 seconds
before turning it off.
If 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, first issue the CLI
see .
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.
M7i AC Power Supply on page 22
M7i DC Power Supply on page 23
Removing an M7i AC Power Supply on page 107
Troubleshooting the M7i Power System When the LED on One M7i Power Supply Is Off
on page 81
An AC-powered router has one or two load-sharing AC power supplies, located at the
bottom rear of the chassis, as shown in Figure 2 on page 6. For information about power
supply redundancy and replaceability, see "M7i Power System Description" on page 21.
Figure 14 on page 23 shows the power supply.
request system halt command. For more information,
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