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ABB 3BSE022457R1 CI840

1. Product Identification

• Manufacturer: ABB
• Product ID: 3BSE022457R1
• Type Designation: CI840
• Product Name: CI840 PROFIBUS Communication Interface
• System Family: ABB System 800xA / S800 I/O
• Product Type: Field Communication Interface (FCI) module
• Main Function: PROFIBUS DP-V1 communication interface for S800 I/O systems

2. Functional Description

The ABB CI840 (3BSE022457R1) is a communication interface module used in ABB S800 I/O systems. It provides communication between the S800 I/O modules and higher-level controllers (such as AC 800M controllers) through a PROFIBUS DP-V1 fieldbus network. It is designed for 1+1 redundant operation, improving system availability in critical process applications.

The CI840 performs:

• I/O module communication management
• PROFIBUS DP-V1 fieldbus communication
• I/O module supervision
• Configuration handling
• Signal processing
• ModuleBus management
• HART pass-through support (system dependent)

3. Technical Specifications

4. Redundancy Configuration

The CI840 is designed for high-availability installations:

• Supports redundant communication architecture
• Typically used with:
  • TU846 — for redundant I/O configuration
  • TU847 — for non-redundant I/O configuration

A redundant setup allows continued operation if one communication interface fails, which is important for:

• Power plants
• Oil & gas facilities
• Chemical processing
• Large continuous production systems

5. Main Features

PROFIBUS DP-V1 Connectivity

• Provides reliable fieldbus communication between controllers and remote I/O.
• Supports industrial process automation requirements.

High Availability Design

• Supports redundant CI840 configurations.
• Suitable for critical control systems requiring minimal downtime.

S800 I/O Integration

• Works as the communication bridge for S800 I/O modules.
• Handles ModuleBus communication and I/O supervision.

Industrial Environment Support

Typical certifications and environmental capabilities include:

• Industrial temperature operation
• EMC compliance
• Hazardous-area approvals depending on system configuration

6. Structural Composition

The CI840 module generally consists of:

• PROFIBUS communication interface circuitry
• Processor/controller electronics
• ModuleBus interface
• 24 V DC power input section
• Status LEDs for diagnostics
• Connection interface to termination unit (TU846/TU847)

7. Typical Applications

ABB CI840 modules are commonly used in:

• Power generation plants
• Oil and gas processing
• Chemical plants
• Water treatment facilities
• Mining and metals industries
• Manufacturing automation systems

Typical system architecture:

AC 800M Controller / 800xA System
⬇
PROFIBUS DP-V1 Network
⬇
CI840 Communication Interface
⬇
S800 I/O Modules
⬇
Field Sensors & Actuators

8. Related ABB Components

9. Advantages

• High system availability through redundancy
• Reliable PROFIBUS DP-V1 communication
• Easy integration into ABB System 800xA
• Suitable for large distributed control systems
• Proven industrial automation platform

Conclusion

The ABB 3BSE022457R1 CI840 is a redundant PROFIBUS DP-V1 communication interface module for the ABB S800 I/O family. It provides the communication link between ABB controllers and distributed I/O modules, offering reliable operation and redundancy for demanding industrial automation environments.