No, the DFC is not combat-only. It can include combat actions but can even be awarded to civilians, e.g. Charles Lindbergh, Wiley Post, Jacqueline Cochran, Roscoe Turner, Amelia Earhart, Glenn H. Curtiss, and Eugene Ely.
The Distinguished Service Cross is the Army's second highest award for gallantry in combat (equivalent to the Navy, Air Force, and Coast Guard Crosses).