Arduino mega and bv20 interfacing

Currently I am working on a project based on vending machine but I have no idea how to connect bv20 with Arduino boards. Also I don't know that how bv20 is going to recognise different kind of bills. Please help me to solve this problem asap. I had seen many question on forum but I don't get any with proper connection and code which help to recognise different notes easily.

Thanks for your help in advance.

Link to the hardware?

This is the link for BV20 https://innovative-technology.com/products/products-main/128-bv20

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