Bill Validators: MDB
Refurbished bill validators and acceptors configured for Multi-Drop Bus (MDB) communication. These units are cleaned, rebuilt with new belts, and calibrated for reliable U.S. currency acceptance in modern multi-price vending machines.
MDB is the standard interface used by most contemporary vending controllers. It allows the machine to communicate directly with the bill validator, coin changer, and other payment devices, supporting features such as multi-price vending, exact-change logic, and higher-denomination acceptance. These refurbished MDB validators give operators a practical way to maintain or upgrade machines that rely on this protocol.
What’s typically included
- MEI / Mars Series 2000 models (such as VN2312, VN2512, and VN2712)
- Coinco Mag Pro and Bill Pro units (including BP2BX and BP4BX)
- Select Coinco BA and Mag series validators with MDB capability
- Conlux / MEI CV models
- CPI Talos T7 and related MDB units
- Options for $1-only or multi-denomination acceptance ($1–$5 or $1–$20)
- Various faceplate styles (soda, snack, and others)
Applications
These validators fit MDB-equipped soda, snack, food, and other vending machines from manufacturers such as Dixie Narco, Vendo, Royal, Crane National, USI, and many others. They are commonly used as direct replacements when an existing MDB validator fails or when upgrading older equipment to support broader bill acceptance. MDB-only models such as the Coinco Bill Pro series simplify installation in machines that no longer require pulse or serial interfaces.
Confirm the exact model, denomination capability, faceplate style, and harness requirements before ordering. MDB harnesses and related parts are available separately. Most units ship quickly and carry the standard limited parts warranty.