Product Description  The RS232-MDB, Perfect for PC to MDB interfaces ( PC2MDB adapter ) It is an adapter to existing vending machines to allow the PC to control 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. 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. 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. RS232-MDB Adapter box RS232-MDB Adapter SDK Packaging & Shipping Paper box for parcking Fast expressdelivery