Feature: 1. This converter box is used for connecting MDB coin receivers, bill receivers and card readers. 2. You can also use for Android motherboard or any other motherboard with RS232 or USB port. 3. You can use the additional USB to RS232 transfer case to create a virtual COM port on your PC or for Android board. 4. Supports MDB, coin receiver, bill receiver, cash interface (10H and 60H) and USD interface (40H). 5. The MDB‑PC USB converter allows the PC to control the coin acceptor, the change dispenser, the smart card reader, the magnetic card, the credit card reader, the bill acceptor and the bill verification. 6. Complies with all NAMA MDB specifications and is compatible with any vending equipment that complies with MDB. 7. A MDB‑PC USB converter can connect up to eight (8) MDB compatible devices. The hardware interface comes with cables, user guide and user agreement. 8. The interface adapter is designed to convert the MDB protocol of the vending machine to the RS‑232 serial protocol, and the USB interface is directly plugged into the computer for use. 9. The adapter is used as a slave of the main control system. The main device can be any control system that supports RS‑232 serial communication, such as a PC. 10. This adapter is designed to convert MDB bill acceptor (BA) and MDB coin changer (CC) protocols to RS‑232 serial protocol. IU is used as a slave of the master control system. Specification: Conditon: 100% Brand New Item Type: MDB‑PC USB Converter Material: ABS Plastic Color: As Pictures ShownStart Bit: 1 Data Bits: 8 Stop Bit: 1 Between Bytes: 1 Ms Response (Maximum): 50 Ms Master Polling Time: 150-300 Ms IU Waits for the Main Polling Time Before Rejecting Ba (Maximum): 3 Seconds Minimum Voltage: 20 VDC Nominal Voltage: 24-34V DC (or 24-30VAC) Maximum Voltage: 39V DC Idle Current Consumption: <0.05A Cable: Standard Computer Serial Cable, Standard MDB Cable. Package List: 1 x MDB‑PC USB Converter1 x Manual