IP Substation - Additional DAK keys

The IP substation board supports input for digits 0 - 9, 10 DAK-keys, as well as M- and C-key. The inputs are available on soldering pads on the substation PCB.

Inputs for DAK's, M-key and C-key:
DAK 1:  N115 + N112
DAK 2:  N115 + N113
DAK 3:  N115 + N114
DAK 4:  N105 + N110
DAK 5:  N105 + N111
DAK 6:  N105 + N112
DAK 7:  N105 + N113
DAK 8:  N105 + N114
DAK 9:  N105 + N115
DAK 10: N106 + N110
-------------------
M-key:  N115 + N111
C-key:  N115 + N110

KEY0 = N110
KEY1 = N111
KEY2 = N112
KEY3 = N113
KEY4 = N114
KEY5 = N115
KEY6 = N105
KEY7 = N106
KEY8 = N107