Keysight A Series User Manual page 823

Safety Considerations
AC/DC Adapter Markings
Keysight N9927-90020 User's Guide
Korean Certification (KC) mark. It includes the marking's identifier code.
GOST, Russia's safety and EMC mark.
AC (Alternating Current).
Direct current (DC) equipment
CAUTION, risk of danger, refer to safety information in manual.
DC connector polarity
Ingress Protection Code
Operating instructions should be considered when operating the device.
U.S. Energy efficiency rating
Eurasian Conformity Mark indicating conformance to all technical regulations of
the Eurasian Customs Union.
UL component mark. Recognized in Canada and the United States.
Operation for indoors only.
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