Product Description The RS232-MDB, Perfect for PC to MDB interfaces ( PC2MDB adapter ),working together will bill acceptor and coin validator. It is an adapter to existing vending machines to allow the PC to work as the cashless payment device to the vending machine. RS232-MDB allows the PC to act as a slave cashless payment device for existing vending machine controllers (VMC). It allows the PC to act as a cashless device and add credit(s) to the vending machine. The RS232-MDB interfaces any MDB vending device to the PC via the serial port. By default it acts as device type 10 (cashless device). It has the switch on the box to select the working address as 10H or 60H. Bill acceptor address is 30H This describes the Interface Protocol for the RS232-MDB Hardware circuit. The RS232-MDB interfaces any MDB vending device (6-pin molex/5pin MTA) to the PC via the serial port (DB-9) Future support may include Universal Serial Bus. The RS232-MDB protocol is compatible with standard RS-232 Protocol. Wafer also provide the best after-sales service for RS232-MDB adapter box.You can add our online service skype for before-sales and after-sales service. and we also provide the SDK for your easy development. Then you can connect the RS232-MDB cashless payment device together with the bill acceptor to existing vending machine. You can send the easy command list,then can communicate with the vending machine to add the credit. and your computer would start to work with the Our RS232-MDB adapter box to act as the cashless payment device to vending machine. We are the Chinese agent of the ITL bill acceptor RS232-MDB Adapter box  (Bill acceptor) RS232-MDB Adapter SDK (Bill acceptor) Packaging & Shipping Paper box for parcking Fast expressdelivery Company Information We are the sole distributor of WAFER bill acceptor,bill validator, NV9,NV11 bill acceptor We can customize the bill acceptor,coin acceptor, cashless payment device