"The block diagram is typically used for a higher level, less detailed description aimed more at understanding the overall concepts and less at understanding the details of implementation. Contrast this with the schematic diagram and layout diagram used in the electrical engineering world, where the schematic diagram shows the details of each electrical component and the layout diagram shows the details of physical construction." [Block diagram. Wikipedia]
The 3D block diagram template for the ConceptDraw PRO diagramming and vector drawing software is included in the Block Diagrams solution from the area "What is a Diagram" of ConceptDraw Solution Park.