Keysight PXIe Chassis Family User Guide 53
Power Supply Capacity Power Supply Operation
To recover from an over-current fault, first eliminate the cause of the
over-current. Then either reset the chassis (press the power button for at least
five (5) seconds) or restart the chassis by cycling power.
Short Circuit Protection
A short circuit condition on any voltage rail will shut down the PPM.
To recover from an over-current fault, first eliminate the cause of the
over-current. Then either reset the chassis (press the power button for at least
five (5) seconds) or restart the chassis by cycling power.
Internal Fuses
Each PPM connects directly to AC power line and is protected by an internal
fuse. These fuses are not customer-replaceable. Contact Keysight if you suspect
a fuse is blown.
Internal Fans
Each PPM contains small internal fans that run constantly when the AC power
line is connected. These small internal fans run even when the chassis is
powered off. In a quite environment, the fans can be heard as a very faint noise.
These fans are not visible. The fan speed is automatic and cannot be adjusted.
Front Panel Power LED
The chassis front panel Power LED is on if all voltage rails are within assigned
limits. It flashes if one or more voltage rails are outside of their specified
upper/lower voltage limits.
Additionally, in the M9010A chassis only, one additional event may cause the
front panel Power LED to flash but will not trigger an alarm. This happens if the
input current is between 8 A and 8.5 A.
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