Mitsubishi Electric FX3S-20MR/DS Programmable Logic Controller

The Mitsubishi Electric FX3S-20MR/DS is a compact 20-point PLC designed for reliable logic control in small machines and packaging lines, featuring 12 24 VDC sink/source inputs and 8 relay outputs powered by a 24 VDC supply. It stores programs in EEPROM with 4,000–16,000 steps and offers on-board USB and RS-422 communications, all in a DIN-rail mountable enclosure measuring 75 × 90 × 49 mm and weighing about 0.34 kg, with a typical power draw of 7 W. The base unit is non-expandable for I/O (up to 30 I/O max) and delivers a fast LD instruction cycle time of approximately 0.21 µs, operating from 0°C to 55°C. Common applications include packaging machines, conveyors, small assembly equipment, material handling, pump control, and other standalone automation tasks where space-saving, cost-effective control is required.