the vcon system card should only be connected to and operated in selv (safety extra low voltage) computers. the vcon system card should only be connected to computers that have a limited power source according to section 2.11 of the en 60950 safety standard or to a computer that has a fire enclosure according to paragraph 4.4.6-4.4.8 of the en 60950 safety standard. after being connected to the computer, only the external connectors should be accessible to users.

    the vcon desktop system card must only be used in a computer that has a screw-down cover or lid. as unsafe voltages (tnv) exist on the card, disconnect the isdn line from the card whenever the cover or lid of the computer is removed.

    there must be an air gap of at least 2mm. between the vcon desktop system card and other components in the computer.