Looking at the button example configuration for the DIN module:
http://www.ucapps.de/mbhp/mbhp_dinx4_32buttons.pdf
I notice that there is a ground for 2 * 16 groups of input. Is it possible for all 32 inputs to share the same ground rail? Indeed can a chain of din modules share the same ground?
The reason I ask is that the (61 note) organ keyboards I am planning to midifi have a single ground rail which I would like to avoid cutting.
Thanks,
James