Doepfer USB64 Universal Midi and USB Controller Electronics Kit - Manual (Page 3)

USB64 User's Guide V1.3 Page 3
Electrical safety / EMC compatibility
USB64 is a so-called OEM product (OEM original equipment manufacturer) that cannot be
used independently but has to be combined with additional electrical or electronical equipment
to become a working device (e.g. potentiometers, switches, power supply, case/housing). The
manufacturer of USB64 does not know the final assembly of the complete device in which the
USB64 is used as a part of the complete device. The final responsibility with regard to
electrical safety and electromagnetic compatibility is up to the user who is assembling the
complete device.
Electronic basic knowledge is required to install USB64 and to connect the controls
resp. control voltages. If you are not sure whether your knowledge is sufficient please consult
an expert. We cannot take back modules that became defective because of wrong installation
or wrong connection of the controls or voltages.
Please pay attention to the following items:
The power supply used in combination with the USB64 has to be a closed type (in Germany a
power supply with VDE approval is required). Normally an AC adapter with plastic case is used.
It is not allowed to use open power supplies whith open mains voltage access (e.g. via mains
lead, pcb tracks, electronic parts).
On the USB64 preventing measures against electromagnetic radiation are taken (e.g. an
RF filter at the power supply input). But it is impossible to estimate to what extend the
components added by the user affect the EMC properties of the complete assembly.
Therefore the complete device has to be shielded against electromagnetic radiation
(incoming and outgoing). These demands are normally met by a closed metal case that covers
the complete assembly. The metal case should be connected to GND of the USB64.