Mitsubishi Electric FX1S-14MR-ES/UL PLC Module

The Mitsubishi Electric FX1S-14MR-ES/UL is a compact MELSEC FX1S base-unit PLC designed for small-scale industrial automation, delivering reliable logic control with built-in digital I/O and relay outputs. It provides 8 digital inputs (24 VDC sink or source) and 6 relay outputs (2 A typical per point), all powered from 100–240 VAC, with a program capacity of about 2000 steps and an RS-422 programming port for ladder-logic control. Mounting options include DIN rail or panel mounting, and the unit measures roughly 90 × 60 × 75 mm while operating from 0°C to 55°C. This legacy, discontinued model is commonly used in machine panels, OEM equipment, and standalone automation for packaging machines, small conveyors, HVAC systems, pump control, and basic assembly equipment; common replacements include the FX3G-14MR/ES (newer generation upgrade), the FX3S-14MR/ES (cost-effective modern alternative), and the FX1N-14MR-ES/UL (higher capability within the older series).