The ABB CI853A is a high-reliability serial communication interface designed for the AC 800M controller within the System 800xA platform. It serves as a versatile bridge for integrating external devices, such as PLCs, motor drives, and specialized sensors, into the control architecture. By supporting both the industry-standard Modbus RTU and ABB’s proprietary COMLI protocols, the CI853A ensures seamless data exchange across diverse automation environments. Its rugged design, including G3-compliant corrosion protection, makes it suitable for demanding industrial applications in energy, manufacturing, and transportation infrastructure.
Technical Specifications
Manufacturer:ABB
Module Type:Serial Communication Interface (RS-232C / RS-485)
Multi-Protocol Versatility:Supports Modbus RTU for broad third-party device compatibility and COMLI for integration with legacy ABB systems.
Hot-Swap Capability:Engineered for high-availability systems, the module can be replaced while the controller is powered, significantly reducing maintenance-related downtime.
Extended Range Support:While standard serial links have distance limits, the CI853A can interface with fiber optic converters to extend communication lines up to several kilometers.
Master/Slave Flexibility:Can be configured as a network Master to poll field devices or as a Slave to provide data to higher-level supervisory systems.
Environmental Resilience:Featuring G3-rated conformal coating, the internal circuitry is protected against atmospheric contaminants and harsh industrial gases.
