What the part is
The Mitsubishi FX3S-14MT/DS is a base-unit PLC in the FX3S line, specified as 8 inputs and 6 transistor sinking outputs. It files under PLCs and Accessories, sub-category Industrial Computer Board, inside the PLCs & HMIs tree.
Where this I/O count fits in the FX3S row
Against the FX3S-10MR/DS sibling, the FX3S-14MT/DS adds more points — 8 IN / 6 OUT versus a 10-point footprint — and swaps the output stage to transistor sinking rather than relay, which is the real fit question for any panel that was originally specified around the relay-output sibling. The 20-point FX3S-20MR/DS sits one rung up in the same family for buyers who need a relay-output path at higher I/O density.