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PLC analog I/O modules supply the values needed for precision control of a process including level, flow, and pressure data. Analog I/O signals come in ranges such as 0-20mA, 4-20mA and 0-10VDC. DirectLOGIC 405 PLC analog modules are available in 12 or 16-bit resolution current, voltage, and temperature models that support a wide range of input signals.