In this comprehensive MDB tutorial, we offer a simple explanation of what MDB is and how our products interact with it. So, what is MDB, and how does it work? What does the acronym mean? MDB stands for “Multi Drop Bus,” a connection technology used in vending machines for peripheral devices such as coin validators and banknote readers. This standard, initially developed by the NAMA, was adopted in Europe by the EVA and outlines the electrical interface, serial communication, and logical protocol.

Multi-Drop Bus and Compatibility

The bus used in MDB, though not modern, is still widely used. Its electrical signal operates as a “current loop,” communicating with 9 bits. Modern PCs or controllers cannot directly interface with this signal, and that’s why they need an MDB interface. With this type of interface, all MDB devices can be connected and addressed via a standard USB port.

Despite the availability of coin validators or credit card terminals with other protocols, using MDB remains beneficial. It is the international Western standard, consequently ensuring compatibility among devices from various manufacturers. Often, upgrading an existing vending machine requires the use of an MDB interface, and that’s why it is an essential technology in the vending industry.

Why Use the MDB Interface?

• Standardization: Firstly, because the MDB interface is an international standard. Consequently, this guarantees that devices from different manufacturers work seamlessly together.
• Upgrading: Moreover, because even with newer interfaces available, the MDB interface is often necessary for upgrading existing machines.
• Reliability: In addition to this, the MDB interface remains a trusted technology in the vending industry, supported by a long history of development and use.

If you still want to learn more about MDB, you can complement this reading with our comprehensive article about the transformative impact of the MDB technology in vending, which you can find at this link.