29© by N&W GLOBAL VENDING SpA 02-2007 266 00PAYMENT SYSTEM EXPANSION BOARDThis board (see fig. 29) is supplied with the installation kitof “change giver” or “cashless” payment systems.It must be connected to the control board using the specialconnector.According to the communication protocol used by thepayment system, the 2 minidips will have to be set to OFF(Executive) or to ON (MDB).PUSH-BUTTON BOARDThis board controls the alphanumeric display, the selec-tion buttons and the programming button (see fig. 30).It supports the coin mechanism connectors as well as theprinter port.Fig. 291 - Power supply (MDB - BDV)2 - To the the payment system (with special cable)3 - To the control board4 - Payment system configuration minidipsOFF = Executive / BDVON = MDBFig. 301 - To the front validator2 - Not used3 - To machine board4 - Signals: free vend - jug facilities5 - To display board6 - Display contrast adjusting trimmer7 - Programming button8 - Wash button9 - RS232 port10 - To the programmer11 - Display board