Innova Inteltech: MDB IF5-A Interface

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Product code: IF5-A

For connecting a bill validator to master board of a coffee vending machine is necessary a MDB interface IF5 or IF5-A or other compatible interface.

Maximum input voltage 36V DC for interface IF5-A , typical MDB voltage 34V DC for vending machines.
This interface can be used with bill validators from Innovative like BV/NV series BV20,BV50,BV100,NV10/9/8/7 into a vending machine or a snack machine.
Examples of vending machines that use MDB protocol:
-Wittenborg 7100
-Saeco Rubinio 200
-Saeco Group 500
-Saeco Cristallo 400
-Saeco Atlante 700
-Crane Genesis B2C
-Crane Evolution B2C
-Necta Astro Es
-Necta Kikko Max
-G-Caffe Espresso
-Perla
-Perla Combi
-FAS 500

Short description of MDB IF5-A Interface prototype

Kort beskrivelse af MDB IF5-A prototype
Anschlußbox MDB IF5-A

Diese Anschlußbox ermöglicht den Hardwareanschluss der Notenleser NV7/8/9/10/200 BV20/50/100.

IF5-A interface is a new version of IF5 in terms of longer lifetime due to reliable optocouplers and limiting inrush current. With this interface a number of over 3000 transactions from bill validator to master can be made. It is using high speed optocouplers that allow data rate transfer up to 56 kbps, but MDB protocol is using a 9.6kbps.

Below is two pictures that show improvement over standard MDB interface. At the same baud rate the output signal from optocoupler is attenuated 50 % from total duty cycle. Our interface has at output 98 % from original signal.

Why is important to have the output signal unattenuated? Because the tick generator from baud rate read the pulse in the middle, and if is 0 in the input signal but at output is 0 instead of 1 we have an communication error. We know that electrical parameters in time is changing, creating an communication error dependent by probability.

Note: Signals from master to validator are inverted in accordance with MDB protocol

Yellow trace is the input signal identicaly for both configurations

Blue trace is the optocouplers output signal from standard interface
using TLP181 or TLP185

Blue trace is the optocouplers output signal from IF5-A interface

With IF5-A new optocoupler configuration , we assure that electrical parameters will not affect communication over time.

Block diagram
Blokdiagram

Interface connector pin details

Kontaktflade stik pin detaljer

Visual signals from module
Visuelle signaler fra modul

GB RED led -OFF state, indicates no input voltage available
DK -Slukket tilstand, viser tilgængelige input spænding
FR -Lumière rouge éteinte, indique qu'aucune tension d'entrée n'est pas disponible
IT -Stato OFF, indica nessuna tensione di ingresso disponibili
DE -AUS-Zustand zeigt keine vorhandene Eingangsspannung an
ESP -Estado OFF indica que no hay tensión de entrada disponible

GB -ON state, indicates available input voltage

DK -På stat, angiver tilgængelige indgangsspænding
FR -Lumière rouge sur indique la tension d'entrée disponible
IT -Stato ON, indica tensione d'ingresso disponibili
DE -ON-Zustand, zeigt die verfügbare Eingangsspannung an
ESP -Estado ON, indica la tensión de entrada disponible

GB YELLOW led : -OFF state, indicates damaged voltage regulator (LM2576)
DK -Slukket tilstand angiver beskadigede spændingsregulator
FR -Le voyant jaune indique un régulateur de tension endommagé
IT -Stato OFF, indica regolatore di tensione danneggiato
DE -AUS-Zustand, zeigt den beschädigten Spannungsregler an (LM2576)
ESP -OFF, indica el regulador de voltaje dañado

GB    -ON state, indicates output voltage from regulator (LM2576) before
   output protection
DK -På tilstand indikerer udgangsspænding fra regulatoren (LM2576)
   før udgangsbeskyttelse
FR -Le voyant jaune allumé indique la tension de sortie du régulateur (LM2576) avant la protection de sortie

IT -Stato ON, indica la tensione di uscita dal regolatore (LM2576) prima di protezione delle uscite
DE -ON-Zustand, zeigt die Ausgangsspannung des Reglers (LM2576) vor dem Ausgangsschutz an
ESP -ON, indica la tensión de salida del regulador (LM2576) antes de la protección de salida

GB GREEN led -OFF state - indicate damage from validator

- indicates no input voltage at validator

- triggered output protection to validator
DK - Slukket tilstand angiver ingen indgangsspænding på validator
FR - Le voyant vert éteint indique les dommages causés par le validateur ou la
protection de sortie déclenchée au validateur
IT - indicare i danni da validatore
DE -AUS-Zustand zeigt Schäden vom Validator an
ESP -El estado OFF indica el daño del validador

GB -ON state - indicate output voltage from module
DK - På tilstand indikerer udgangsspænding fra modul
FR -Led vert allumé indique la tension de sortie du module
IT -indicare tensione di uscita dal modulo
DE -ausgangsspannung vom Modul anzeigen
ESP -Estado ON - indica la tensión de salida del módulo

Summary of advantages:

-limiting inrush current drawn from master board (yellow trace is an standard interface without limiting ,
and the blue trace is our interface with limiting function)

-direct replacement of standard MDB interface IF5 , pin to pin compatible

-easy install in vending machine due to lateral IDC gold plated connectors

-new configuration of optocouplers(removed old optocouplers TLP181 with a new high speed baud
rate optocouplers) assures over 3000 cash transactions of the bill validator

-low input current drawn from the MDB bus data

-baud rate up to 56kbps

-warranty 6 months and replace with new interface product inside the warranty interval time

Limiting inrush current

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MDB IF5-A Interface