momentary contact closure
GPI/O Pinout
Pin
Function
Pin
Function
Pin 1
+5VDC
Pin 9
+5VDC
Pin 2
GPI 1
Pin 10
GPO 1
Pin 3
GPI 2
Pin 11
GPO 2
Pin 4
GPI 3
Pin 12
GPO 3
Pin 5
GPI 4
Pin 13
GPO 4
Pin 6
GPI 5
Pin 14
GPO 5
Pin 7
Ground
Pin 15
Status OK
Pin 8
Ground
Figure 5-6 - GPIO pinout