Communication Module CI840A-EA ABB Unit for Fieldbus Integration Control System primarily 4−20 mA current and

primarily 4−20 mA current and various DC voltage ranges

5% to 45% above 55°C (131°F) (non-condensing)

24 miles) between baseplates

Advanced Functionality: Address indexing

Communication Module CI840A-EA ABB Unit for Fieldbus Integration Control System primarily 4−20 mA current andOverview The ABB CI840A EA is part of the S800 I O family, a modular and distributed I O system used in ABBs System 800xA architecture. This module acts as a Fieldbus Communication Interface (FCI), enabling reliable and flexible data exchange between I O modules and parent controllers or PLCs. Designed for redundant applications, the CI840A EA supports hot configuration in run, allowing system updates without interrupting operations. It also handles