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While this one-to-one, logical-to-physical model works well for a simple design, it cannot support all of the design requirements needed by the electronic product designer today. The components you place on the schematic sheet are logical components, each a conceptual entity that represents the actual component that is ultimately mounted on the assembled PCB.

This distinction is important, as it underlies some of the most powerful features in Altium Designer. In Altium Designer there are two types of components, logical components, and physical components. Understanding Logical and Physical Components This article take a closer look at how you define and manage variants in Altium Designer 14.3. This type of variant is referred to as a Fabrication Variant.Īlong with the introduction of support for alternate parts, the Variant Management user interface has been updated and simplified. This type of variation requires 2 overlay screens to be produced, resulting in 2, different bare boards. There is also support for variations to component overlay information on the PCB, for example changing a components comment. Variants that use any of these types of variations are all referred to as Assembly Variants, as they only impact on the assembly process - all variants share the same fabricated bare board. Using variants, you can define any number of variations of the base design, configuring each component to be: fitted not fitted fitted with modified component parameters, such as the component's value or, with the release of Altium Designer 14.3, you can completely replace a component with an alternate part. The ability to create variations of the same base design is a real strength of Altium Designer, and a tremendous productivity booster for designers.