Can only a card reader be installed in a MDB vending machine?

In many cases, a vending machine that uses MDB can be set up to use only a credit card / NFC reader. It depends on the software and in some cases how the board is programmed. You can test if it will only work with a credit card / NFC reader if you have an active telemeter. The second option is to contact the manufacturer of the machine and ask about the limitations of their software.

Cigarette machines need the coin changer to remain in place.

Known card reader only applications work when a kit is installed.

It is possible to install only a credit card / NFC reader in a soda vending machine wired for a single price changer.

It is possible to install only a credit card / NFC reader in an American Changer with a legacy board, Universal Board, Super Universal board, Flex, and Flex 2 board.

It is possible to install only a credit card /NFC reader in a Rowe dollar bill changer.