A system provides a digital multi-bit connection between two or more graphics adapters. The connector can include two spacers made of materials each with a different hot strength wherein the first spacer, fixed adjacent the casing, has a higher hot strength that the second spacer, which is fixed adjacent to the actuator. The critical data is retrieved upon the occurrence of a critical event. The electrode assembly includes an electrode having an active fixation arrangement such as a helical fixation element.