This board is a breakout board of a Digital Isolator chip from Silicon Labs. The main function of this chip is to isolate 2 circuits which each having their own voltage source, and at the same time help them to communicate.
The usage of this chip is to isolated each side so they won't affect each other with noise nor voltage surge.
Here is the schematic of the board.
Here is the component's datasheet for your reference :
Where to buy
If you are interested, this board is offered at marketplaces below :
- https://bit.ly/TP-PALTA (Tokopedia)
- https://bit.ly/SP-PALTA (Shopee)
- https://bit.ly/Tindie-PALTA (Tindie)