NEXCOM NViS 3620 - Manual (Page 79)

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Appendix D: Signal Connection of MCU DI/DO
NViS3620/3720 series User Manual
The figure below shows how to connect an external input source to one of
the output channel.
Digital Output
MCU-DI1
MCU-DI2
MCU-DO1
MCU-DO2
DB9-FEMALE-90-5.08mm
5
9
4
8
3
7
2
6
1
Internal External
External Power
External Resistor
DO
Register
Port
1 OPEN
0 GND
Event Button
2 1
Pin Definition
1 Event Input
2 GND