The Modicon M238 range has been designed to do more, it's small but mighty! Offering users an economical controller that provides more memory, extra input options. Acting as one of the core components that operate a programmable logic controller, Schneider Electric analogue modules are a messenger between a processor and an I/O device (I/O stands for input/output). This Modicon M236 range of analog modules forms part of Schneider's Twido series of programmable controllers for standard applications comprising 10 to 100 I/O - plc.