MINI and MIX Series I/O modules/Modbus
version 1.3 www.gc5.pl Page 23 / 73
3 Local I/O
3.1 Universal Inputs connections
Connection of Universal Input to measure voltage 0 – 10V
Figure 18 Connection of UI to measure 0-10 VDC for MIX38 and MIX38-IP
Connection of Universal Input to measure current 0 – 20 mA
Current measurement is realized by voltage measurement and 200 Ω resistance. According
to the Ohm’s law the current is directly proportional to the voltage and the resistance as the
constant of proportionality.
According to the Ohm’s low equation for 20 mA current with 200 Ω resistance the output
voltage is 4 V. It means that the voltage 4 V on the Universal Input corresponds to 20 mA
current.
The result is expressed in millivolts.
Figure 19 Connection of UI to measure 0-20 mA for MIX38 and MIX38-IP
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