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Robustel R3000 LG User Guide
RT_UG_R3000 LG_v.1.0.4 19 Jul., 2018 109/133
4.1.2
Digital Input
4.1.3
RS-232
R3000 LG supports digital input with dry
contact. Please check the connector
interface of the gateway, you can easily
find a mark “V-” at one pin of the power
connector.
Note:
Do not connect In1/In2 directly and
do not slide the switch to the port marked
“GND” on the terminal block. Otherwise,
the DI cannot work properly.
R3000 LG supports one RS-232 for serial
data communication. Please refer to the
connection diagram at the right side.
Power Negative