Most industrial panel are set up very alike, Transformer at the top left corner, PLC and Power supplies in the center, and Input/Output terminal blocks and intrinsic barriers at the bottom. It's very good practice to not run signal wires in Parallel with voltage carrying wires because of possible induced voltage, crisscrossing is fine though and of-course shielded signal wires and lower voltage lines don't apply to this. Doing this though is unfortunately not always possible. Key to a nice panel is proper color coding and proper use of wiring duct.