STMicroelectronics X-NUCLEO-OUT03A1 Expansion Board is an industrial digital output expansion board for STM32 Nucleo. This board provides a powerful and flexible environment for the evaluation of the driving and diagnostic capabilities of the IPS2050H module. The X-NUCLEO-OUT03A1 interfaces with the microcontroller on the STM32 Nucleo via 5kV optocouplers driven by GPIO pins, Arduino UNO R3, and ST morpho connectors. This expansion board can be connected to either a NUCLEO-F401RE or NUCLEO-G431RB development board. It is also possible to evaluate a system composed of up to four stacked X-NUCLEO-OUT03A1 expansion boards.