Features 1This converter is used for connecting MDB coin receivers, bill receivers and card readers. 2You can not only just use the RS232 port of the computer but you can also use for Android motherboard or any other motherboard with RS232 or USB port. 3If you only have a USB port, you can use the additional USB to RS232 transfer case to create a virtual COM port on your PC or Android board. 4Supports MDB, coin receiver, bill receiver, cash interface (10H and 60H) and USD interface (40H). 5Allows 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. 6Complies with all NAMA MDB specifications and is compatible with any vending equipment that complies with MDB. The hardware interface comes with cables, user guide and user agreement. 7A single MDB to RS232 converter can connect up to eight (8) MDB compatible devices. 8The interface adapter is designed to convert the MDB protocol of the vending machine to the RS232 serial protocol. 9The adapter is used as a slave of the main control system. The main device can be any control system that supports RS232 serial communication, such as a PC. 10This adapter is designed to convert MDB bill acceptor (BA) and MDB coin changer protocols to RS232 serial protocol. IU is used as a slave of the master control system. Specification Conditon: Item Type: MDB to RS232 Converter Material: ABS Plastic Color: As Pictures Shown Start Bit: 1 Data Bits: 8 Stop Bit: 1 Between Bytes: 1 Ms Response (Maximum): 50 Ms Master Polling Time: 150-300 Milliseconds IU Waits for the Main Polling Time Before Rejecting BA and coin changer (Maximum): 3 Seconds Minimum Voltage: 20V DC Nominal Voltage: 24-34V DC (or 24-30V AC) Maximum Voltage: 39V DC Idle Current Consumption: