Fisher-Rosemount CL6821X1-A6 Analog Input Card is an analog input module used in Fisher-Rosemount control systems to bring analog process signals into the controller. Alternate part number CL6821X1A6 is listed, and the description references firmware/software version P1.5.2. This card functions as the analog input interface within the system's I/O topology, enabling input from field devices for monitoring and control.
