Vending machine controller II

Description development / required specifications

Development of a universal Vending Machine Controller.

24 digital inputs at 24V DC
14 digital relay outputs (max. 24V DC)
Expandable with internal I/O printed circuit board: 16 digital inputs and 10 digital relay outputs
Expandable with optional external card (analogue I/O, communication, etc.)
192 KByte Flash Eprom programme memory
Memory: 32 Kbyte expandable to 2 Mbyte with battery back-up
Real-Time Clock
LCD display interface: connection for a 2x20 or 4x20 text display
LED display interface: connection of a numeric LED display (max. 4 digits)
RS232 port with full handshaking (for the modem) or RS485 (selectable)
RS232 port with full handshaking (external modem) or inbuilt GSM/GPRS modem
MDB-compatible port
Optional TCP/IP stack and e-mail
OEM printed circuit board
24V DC power supply
Easily programmable in C