Analog current input

[obapec]

KC868-A16 have 4 channel analog input ports.
actually the circuit is same, if use for VOLTAGE or CURRENT, just replace two resistance for SWITCH.
for example, if you want CHA1 use for 4-20mA, you can replace R70 resistance with 0ohm, R72 resistance with 150ohm.
every analog input channel switch as the same way. so if you want 4 channel of 4-20mA, just replace with all resistance.

I have a question : how replace the resistance : change the cms resistor on the board ?
it's difficult to do it  without specific materials ?
So can we use 4-20mA sensor on the adc 0-5V with an exterior resistor ?
thanks