Doepfer CTM64 Contact to Midi Interface (main board) - Manual (Page 2)

page 2 CTM64 Version 4 - User's Guide
Electrical safety / EMC compatibility
CTM64 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. keyboard, switches, buttons, potentiometers, power supply, case/housing). The
manufacturer of CTM64 does not know the final assembly of the complete device in which the CTM64
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.
Please pay attention to the following items:
The power supply used in combination with the CTM64 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 with open mains voltage access (e.g. via mains lead, pcb
tracks, electronic parts).
On the CTM64 electronics preventing measures against electromagnetic radiation are met (RF
filters at the power supply input and the MIDI lines). 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 CTM64.
Warranty
• The 64 contact connectors (JP1, JP2, JP3, JP4) and the common connector for contacts (JP6) are
allowed to be connected only to free contacts but not to voltages !
• Applying any voltage (including GND or +5V) to the 64 contact connectors (JP1, JP2, JP3, JP4) will
destroy the circuit.
• Applying any negative voltage (< 0V) or positive voltage above +5V (> +5V) to the common
connector for contacts (JP6) will destroy the circuit !
• Applying any negative voltage (< 0V) or positive voltage above +5V (> +5V) to the potentiometer
connectors (ST1, ST2, ST3, ST4) will destroy the circuit !
• Applying any negative voltage (< 0V) or positive voltage above +5V (> +5V) to the sustain socket
(BU4) will destroy the circuit !
• Applying any negative voltage (< 0V) or positive voltage above +5V (> +5V) to the jumper pin header
(JP5) will destroy the circuit !
• Do not solder directly to any of the pin headers but use female connectors to make the connections
between the CTM64 and your application. We offer a suitable cable set that contains all required
connectors and cables.
• Carry out all connections in the off-state of the CTM64 (i.e. without power supply) !
• The CTM64 electronics is an electrostatic sensitive device. Avoid any electrostatic charges !
• Avoid short cuts !
• Ignoring any of these items will cause warranty loss !
• Return of the CTM64 within the 2 weeks return time limit (valid only in Germany) is only possible if
all these items have been met. Return of used cable sets is not possible.