Water vending machine controller

The ESDI Model 050200A MultiPrice Water Vending Machine Controller is an electronic circuit board assembly that performs all of the functions necessary to control and operate a Three Product, Three Price, unsupervised bulk water vending machine. This controller interfaces with most coin acceptors, bill validators, card readers, and other payment devices utilizing the NAMA® Multi-Drop Bus (MDB) protocol. It also incorporates features and options that make it cost effective and easy to use.