The PLC-K633-04IV Analog Input/Output Module was designed to do the job of both the PLC-K631 and PLC-K632 series all on one module. The PLC-K633-04IV is equipped with 2 analog inputs and 2 analog outputs. The PLC-K633-04IV performs a 12-bit conversion on the inputs for high-resolution measurement and can be configured to read voltages or currents of different ranges. The current ranges of the analog inputs are 0-20 mA or 4-20 mA, and the voltage ranges of the analog outputs are 1-5 VDC or 0-10 VDC. The analog outputs have a 12-bit output resolution allowing the user to increment in 976uV or 3.9uA steps. The current ranges of the analog outputs are; 0-20 mA or 4-20 mA. The voltage ranges of the analog outputs are 1-5 VDC or 0-10 VDC. The K633 series has an accuracy of +/- 0.5% to ensure a precise reading.