The Omron CQM1-CPU21 Programmable Logic Controller is a rack-mounted CPU unit in the CQM1 family, built to execute control programs, manage input/output operations, and coordinate automated machine processes in industrial environments. With a program capacity of approximately 3.2K steps and about 2K words of data memory, it operates via cyclic scan and provides a dedicated peripheral port for local communications. I/O capacity is expandable through CQM1 I/O modules, and power is supplied by the base unit; the operating temperature range is 0°C to 55°C, supporting use in typical industrial environments. Common applications include packaging machines, conveyor systems, assembly lines, and other small-scale production equipment where dependable PLC control is required; it is widely used in material handling, food processing equipment, and production lines. Common replacements include Omron CQM1H-CPU11, CQM1H-CPU21, and CJ1M-CPU11.
