I'm fairly certain (though have not verified) that the ONLY interface available on the LA120 family is serial. The LA180 uses a much more system-friendly LP[v]11 or LS11 interface. That may be the difference...target market, etc. RS-232 and 20mA current loop. I saw nothing about parallel in the docs. -Dave -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects