PLCs (analog units) are used for processing analog temperature, pressure, audio and other input and converting digital input into analog output. In analog-to-digital conversion, error is minimized by using a machine that streamlines quantization. PLCs (analog units) are capable of high-speed measurement and instant conversion. Numerous models are available with a wide range of functions, including disconnection detection, averaging and peak hold functions. The range of unit widths available starts from 12 mm to enable space-saving installation in any place. Current and voltage input types are supported, and some models are capable of configuring up to 16 channels for each input type. Models with detachable terminals have an advantage in terms of maintainability.