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4.6 Modbus Protocol for GPIO&ADC Acquisition
4.6.1 The Way of Cable Connection.
Analog input
a. Single-cable: Connect the analog output of the sensor to the analog
input(ADC) of F-IM100
directly. b. Double-cable: Connect the positive of analog output of the sensor to
the analog input(ADC)
of F-IM100, and connect the ground wire to GND(PIN2) of F-IM100.
Digital input
a. Low level input
:
Connect the input of contact switch to GND of F-IM100 and
connect the output
of contact switch to the digital output of F-IM100(IO1/IO2).
b. High level input
:
Connect 3.3V voltage output to IO1/IO2, and connect the
ground wire to
GND of F-IM100.