ABB CI858 AC 800M Communication Interface Unit

Product Overview

Product Name: ABB CI858
Product Type: Communication Interface Module
System Compatibility: ABB 800xA Distributed Control System (DCS)

The ABB CI858 is a high-performance communication interface module designed for use in ABB’s 800xA DCS and related process control environments. It plays a vital role in enabling seamless, high-speed communication between controllers, I/O modules, field devices, and other systems, making it a cornerstone for modern industrial automation.

Key Functions

• Ethernet Communication:
  Provides Ethernet-based connectivity, enabling the AC 800M controller to communicate with external devices, networks, and systems for high-speed data exchange.

• ModuleBus Interface:
  Acts as the communication interface between the controller and local I/O modules via the internal ModuleBus, ensuring reliable data transfer within the same controller unit.

• Communication with I/O and Field Devices:
  Supports integration with a variety of components, including:

• Remote I/O Units: Such as the S800 I/O system for collecting sensor data and controlling actuators.

• Other Controllers/Systems: Facilitates peer-to-peer communication between controllers or integration with higher-level control layers.

• Field Devices: Communicates with smart field instruments when connected to a suitable industrial network.

• Redundancy Support:
  Can be deployed in redundant pairs to ensure uninterrupted communication. In the event of a module failure, the backup module takes over automatically—essential for critical applications demanding high availability.

• Diagnostics:
  Equipped with diagnostic features such as LED indicators for module status, network activity, and error states, simplifying troubleshooting and system monitoring.