Modify VM129 for 12 DC power supply

Hi, I bought the VM129 to be used with a k8055 in a home automation project, however the project will be powered by 12v DC and the vm129 is made for a 12 AC supply.

Is it possible to modify the board to accept a DC supply?

Could the board just be driven “backwards” by just putting 12v DC on the 12v power out connection? (with or without disconnecting the onboard AC/DC adaptor).