Power Supply
This module is designed to run from a plus and minus 12V supply. These should be adequately
regulated. The current consumption is about 20 mA per rail.
The power header is labelled PSU on the circuit board and is a standard 10 pin Doepfer style
power supply connection. This is a 2 x 5 0.1” header and will fit 0.1” flat ribbon IDC sockets.
The board should have been fitted with a box polarised header. This stops the cable from
being plugged into the module the wrong way around.
The -12V connection follows the convention set by Doepfer and is at the bottom corner of the
main circuit board. The -12V connection is usually depicted by a red stripe on the cable. Thus
the red stripe should be fitted so that it goes to the bottom of the module.
Do not connect your VCA module to your modular's power buss without switching your
whole modular off first.
The issue 2 Oakley Classic VCA does have reverse polarity protection up to a point. It
achieves protection by shorting out the power supply if the power is reversed. The power
supply should switch off when this happens thus protecting both the module and the power
supply. If you connect the Oakley VCA to your modular and the modular will then not boot
up properly the chances are that you have reversed the cable. Quickly switch off the modular
and check the cable polarity.
The old issue 1 Classic VCA features no power supply protection. Take extra care in ensuring
that the -12V supply connects to the bottom of the header. Failure to do so will damage the
module.
4
