What it is
The Mitsubishi FX5-4DA is a 4-channel analog output module for the FX5 PLC platform that drives proportional valves, variable-speed drives and instrument loops from the controller's tag space.
Where it lives in the panel
It is an FX5-series I/O brain for analog output, plugged onto the FX5 base in the same DIN-rail row as other FX5 slices and pulling power from the FX5 backplane.