The ornamental design for “a controller for an electronic fence”, as shown and described.
FIG. 1 is a perspective view of the controller for an electronic fence according to the present invention;
FIG. 2 is a front view of the controller for an electronic fence according to the present invention;
FIG. 3 is a rear view of the controller for an electronic fence according to the present invention;
FIG. 4 is a left side view of the controller for an electronic fence according to the present invention;
FIG. 5 is a right side view of the controller for an electronic fence according to the present invention;
FIG. 6 is a plane view of the controller for an electronic fence according to the present invention; and
FIG. 7 is a bottom view of the controller for an electronic fence according to the present invention; and,
FIG. 8 is a perspective view of the controller for an electronic fence with the cover open to show portions of the design not visible in the other views.
The broken lines shown in the drawings are for illustrative purposes only and forms no part of the claimed design.