Appendix A: Gpio Connection; Digital Input; Digital Output - Nexcom VMC 3020 User Manual

Appendix A: GPIO Connection

a a: g
PPendIx

Digital Input

The figure below shows how to connect an external output source to one
of the input channel.
Internal
External Power
5
9
MCU-DO2
MCU-DI2 4
8
MCU-DO1
3
MCU-DI1
7
2
6
1
DB9-FEMALE-90-5.08mm
Copyright © 2016 NEXCOM International Co., Ltd. All Rights Reserved.
C
PIo onneCtIon
External
External Resistor
External DI
Port
Switch Register
ON (Short) GND 0
OFF (Open) HIGH 1

Digital Output

The figure below shows how to connect an external input source to one of
the output channel.
Internal
5
MCU-DO2 9
4
MCU-DI2
MCU-DO1 8
3
MCU-DI1
7
2
6
1
DB9-FEMALE-90-5.08mm
70
External
External Power
External Resistor
DO
Port
Register
1 OPEN
0 GND
VMC 3020 User Manual