MedeaWiz Hydra H-9X28D User Manual page 33

MedeaWiz® Hydra™
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Wiring for 3x4 matrix keypad or up to 12 individual push buttons.
A 4x4 keypad wiring will be similar but using inputs 0-3 as C1-C4 and inputs 4-7 as R1-R4.
A 5x5 push button arrangement will use inputs 0-4 as C1-C5 and inputs 5-9 as R1-R5
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