MDB is the abbreviation of MDB/ICP protocol (Multi-Drop Bus/Internal Communication Protocol). It is a set of protocols developed by the European Vending Machine Manufacturers Association for coordinating the communication between the main controller (VMC) of the vending system and multiple peripherals. The standard was first developed by Coinco under the designation of the American Coca-Cola Company. This standard was adopted by the NAMA organization in 1993; after being revised by NAMA, it was adopted by EVMMA in 1994. The second phase of the non-cash transaction standard was developed by Debitek on behalf of NAMA and adopted by NAMA in 1994; EVMMA adopted it in 1994 after adding some compatible instructions.
The MDB interface is actually a master-slave serial bus interface operating at a baud rate of 9600. The peripheral devices used (such as coin acceptors, bill acceptors, credit card readers, etc.) are all slaves of the main controller (vending machine controller-VMC). The communication method between all peripheral devices and VMC is consistent.
At present, the MDB communication protocol is mainly used in self-service vending machines. It can directly connect to peripherals such as banknote acceptors, coin acceptors, and non-cash credit card swipes that also support the MDB protocol to complete the payment transaction in the self-service vending process.
If you want to use these payment devices normally on the self-service vending machine, the vending machine system needs to support the MDB communication protocol. Our company has a motherboard with a complete MDB protocol solution based on the Android system and the Linux system. The coin acceptor, banknote acceptor, and card swipe can be directly connected to our Android/Linux motherboard, and there is no need to connect the MDB converter in the middle, which can save costs.
During use, the banknote acceptor, coin acceptor, and non-cash payment device with the MDB interface can be connected to the Android motherboard or Linux motherboard with the MDB interface. The motherboard is the core control motherboard of the self-service vending device, which completes the core functions of the self-service device such as screen display, MCU control board (for various motor controls), network connection (Ethernet, WiFi or 4G mobile network), so as to realize a reliable payment system for the vending machine.
