16
1. Manual button A: 1
2. Manual button B: 2
3. Manual button C: 3
4. LED light: 4(+5V), 6(DGND)
5. Manual button D: 5
8P function port description
1. LOGO light: 1, 5(+S5V)
2. Oil level sensor: 2, 6(+S5V)
3. GND: 3, 7
4. Presser foot sensor: 4, 8(+S5V)