STMicroelectronics X-NUCLEO-OUT05A1 Expansion Board is used to evaluate the driving and diagnostic capabilities of the IPS1025H. The IPS1025H is a single high-side smart power solid state relay, in a digital output module connected to 2.5A industrial loads. The X-NUCLEO-OUT05A1 interfaces with the microcontroller on the STM32 Nucleo via 5 kV optocouplers driven by GPIO pins and Arduino R3 connectors. The expansion board can be connected to either a NUCLEO-F401RE or a NUCLEO-G431RB development board.