KBox A-103 – User Guide, Rev. 3.0
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Additional safety instructions for DC power supply circuits
To guarantee safe operation of devices with DC power supply voltages larger than 60 volts DC or a power
consumption larger than 240 VA, please observe that:
the device is set up, installed and operated in a room or enclosure marked with “RESTRICTED ACCESS”, if
there are no safety messages on product as safety signs and labels on the device itself.
no cables or parts without insulation in electrical circuits with dangerous voltage or power should be
touched directly or indirectly
a reliable protective earthing connection is provided
a suitable, easily accessible disconnecting device is used in the application (e.g. overcurrent protective
device), if the device itself is not disconnectable
a disconnect device, if provided in or as part of the equipment, shall disconnect both poles simultaneously
interconnecting power circuits of different devices cause no electrical hazards
A sufficient dimensioning of the power cable wires must be selected – according to the maximum electrical
specifications on the product label – as stipulated by EN60950-1 or VDE0100 or EN60204 or UL508 regulations.
The devices do not generally fulfill the requirements for "centralized DC power systems“ (UL 60950-1, Annex
NAB; D2) and therefore may not be connected to such devices!
