The Schneider Electric TM221ME16T is a compact programmable logic controller (PLC) from the Modicon M221 series (Logic Controller). It is an all-in-one controller that integrates the CPU, a fixed number of I/O points, communication ports, and power supply into a single, space-saving device. Designed for basic to medium-complexity machine automation, it offers a cost-effective and easy-to-install solution.