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Copyright © Innovative Technology Ltd 2018 Doc: NV9 Range User Manual
Version: 1.0
Page 40 of 63
6.6 MDB
6.6.1 General Description
MDB (Multi-Drop Bus) is used in the vending industry and is now an open standard
in the NAMA (National Automatic Merchandising Association) so that all vending and
peripheral equipment communicates identically. MDB uses a master-slave model
where the VMC (Vending Mechanism Controller) is the master that can communicate
with up to 32 slaves (e.g. banknote validator or coin acceptor). Please contact
support@innovative-technology.com for further information.
6.6.2 IF5 Interface
An NV9USB+ running MDB can use an IF5, an external interface box, which
regulates the power supply and opto-isolates the communication lines. Typically
vending machine’s power supply higher voltage than the maximum for the NV9USB+
of 12v +/- 10%. The IF5 drops this higher voltage down to the required level.
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