4 pcs. 1ZB Keycaps on 3A Switches And 1 pc. of 1ZC on 3F Switches, MEC NAVIMEC
| Pin | Name | Type |
|---|---|---|
| L1 | L1 | bidirectional |
| L2 | L2 | bidirectional |
| L3 | L3 | bidirectional |
| L4 | L4 | bidirectional |
| R1 | R1 | bidirectional |
| R2 | R2 | bidirectional |
| R3 | R3 | bidirectional |
| R4 | R4 | bidirectional |
| C1 | C1 | bidirectional |
| C2 | C2 | bidirectional |
| C3 | C3 | bidirectional |
| C4 | C4 | bidirectional |
| U1 | U1 | bidirectional |
| U2 | U2 | bidirectional |
| U3 | U3 | bidirectional |
| U4 | U4 | bidirectional |
| D1 | D1 | bidirectional |
| D2 | D2 | bidirectional |
| D3 | D3 | bidirectional |
| D4 | D4 | bidirectional |
