3
Definitions / Symbols
EN
Class II equipment. Protection
against electric shock
Serial number
For indoor use only
The device is protected against
solid foreign objects of 12.5 mm
diameter and greater such as a
finger.
Indication of connector polarity
The device is protected against
solid foreign objects of 12.5 mm
diameter and greater such as a
finger, and against vertically falling
water drops which may cause
issues during a normal operation.
Alternating current
To indicate generally elevated,
potentially hazardous, levels of
nonionizing radiation, or to
indicate equipment or systems
e.g. in the medical electrical area
that include RF transmitters or
that intentionally apply RF
electromagnetic energy for
diagnosis or treatment.
Direct current
Efficiency Level of power supply
IP20
IP21
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