The ornamental design for a terminalblock, as shown and described.
FIG. 1 is a front, top, and right side perspective view of a terminal block showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a front, top, and right side perspective view wherein a clip thereof is removed;
FIG. 9 is a front view wherein the clip thereof is removed; and,
FIG. 10 is a right side view wherein the clip thereof is removed.
The dashed broken lines in the figures show portions of the terminal block that form no part of the claimed design. The dot-dashed broken lines shown in FIGS. 1, 2, 8, and 9 represent boundaries that form no part of the claimed design.