Overview

The ABB CI840 / CI840A is a Fieldbus Communication Interface (FCI) Module for ABB’s System 800xA and S800 I/O platform. It acts as a communication gateway between AC 800M controllers and S800 I/O units, enabling fast, reliable, and fault-tolerant data exchange.

The module supports redundant applications, making it suitable for mission-critical systems where downtime is unacceptable. Advanced features include Hot Configuration in Run (HCIR), HART pass-through, and supervision information gathering, enhancing flexibility, diagnostics, and system integration.

Technical Data

Typical Applications

• Power generation: Communication between turbine/excitation controllers and distributed I/O.

• Process industries: Connecting AC 800M controllers with sensors and actuators in chemical, oil & gas, and pharmaceutical plants.

• Water treatment facilities: Supervising pumps, mixers, and monitoring equipment via distributed I/O.

• Manufacturing automation: Ensuring seamless communication between controllers and robotic or machine systems.

• Infrastructure systems: Supporting building automation and utility monitoring networks.

Example:
In a refinery, the CI840 module ensures stable communication between AC 800M controllers and remote I/O stations, allowing operators to monitor thousands of signals with high reliability.

FAQ

Q1: What is the ABB CI840 used for?
It is a communication interface module connecting AC 800M controllers to the S800 I/O system.

Q2: Does it support redundancy?
Yes, the CI840 is designed for redundant applications to ensure high availability.

Q3: What advanced functions does it provide?
Hot Configuration in Run (HCIR), HART pass-through, and supervision information gathering.

Q4: Which ABB systems are compatible?
System 800xA, AC 800M controllers, and S800 I/O modules.

Q5: How is it installed?
It is DIN-rail mounted with a mechanical latch for quick installation.