Start by wiring in the power connector and the MIDI Section

Power and MIDI wiring

Then wire up the TRIGGER outputs and (optional) LED indicators

TRIGGER and Status LED wiring

SDS Hi-Hat

From PCB Revision 1.4 onwards the MIDI-Retrofit 16 includes an additional circuit designed to work with the SDS Hi-Hat module.

The circuit has an input from the SDS HiHat control output and, in response to MIDI ‘Modulation’ Control (0xB1) messages, modulates the SDS Hi-Hat signal which is then presented at the [SDS-HiHat] output.

HiHat wiring