5 European directives and standards
Installation manual PMCprimo Drive2
Page
9
UL and cUL- Conformance
UL (cUL)-certified servo amplifiers (Underwriters Laboratories Inc.) fulfil the relevant U.S. and
Canadian standard (in this case UL 840 and UL 508C).
This standard describes the fulfillment by design of minimum requirements for electrically operated
power conversion equipment, such as frequency converters and servo amplifiers, which is intended
to eliminate the risk of fire, electric shock, or injury to persons, being caused by such equipment.
The technical conformance with the U.S. and Canadian standard is determined by an independent
UL (cUL) fire inspector through the type testing and regular check-ups.
Apart from the notes on installation and safety in the documentation, the customer does not have to
observe any other points in direct connection with the UL (cUL)-certification of the equipment.
UL 508C
UL 508C describes the fulfillment by design of minimum requirements for electrically operated
power conversion equipment, such as frequency converters and servo amplifiers, which is intended
to eliminate the risk of fire being caused by such equipment.
UL 840
UL 840 describes the fulfillment by design of air and insulation creepage spacings for electrical
equipment and printed circuit boards.
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