Features: 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% New_x000D_ Item Type: MDB?PC USB Converter_x000D_ Material: ABS Plastic_x000D_ Color: As Pictures Shown_x000D_ Start Bit: 1_x000D_ Data Bits: 8_x000D_ Stop Bit: 1_x000D_ Between Bytes: 1 Ms_x000D_ Response (Maximum): 50 Ms_x000D_ Master Polling Time: 150-300 Ms_x000D_ IU Waits for the Main Polling Time Before Rejecting Ba (Maximum): 3 Seconds_x000D_ Minimum Voltage: 20 VDC_x000D_ Nominal Voltage: 24-34V DC (or 24-30VAC)_x000D_ Maximum Voltage: 39V DC_x000D_ Idle Current Consumption: