• The LM149 comes in 12v and 24v versions. 
  •  The DC is 12-24 volt. 
  • The LM149 with the adapter board are for gate openers powered by battery. The LM149 without the adapter board, which will say 24v, is for house powered gate openers. 
  •  You will only need to convert AC (alternating current) into DC 
  • AC is power from your house, and DC is batteries. 
  • The board just allows the lock to work for gate openers powered by battery. It is a requirement. Otherwise, it won't function properly 
  •  You can plug the 120 into the gate opener, but not into the board. 
  • The customer can decide if they want the power to be AC or DC.