Products Description
ABB CI855K01 3BSE018106R1 MasterBus300 Communication Interface Module

Technical Specifications
Model: CI855K01
Part Number: 3BSE018106R1
Brand: ABB
Product Type: MasterBus300 inter‑system communication interface module
Matching System: ABB AC800M Controller, 800xA DCS System
Power Supply: CEX‑Bus backplane 24VDC
Communication Interface: Dual RJ45 Ethernet ports
Protocol: MasterBus 300
Transmission Rate: 10 Mbit/s, 200 datasets per second
Installation Method: Rack slot mounting, hot‑swap supported
Operating Temperature: 0℃ ~ +55℃, non‑condensing
Protection Class: IP20
Weight: 0.70kg
Dimension: 59mm ×185mm ×127.5mm
Compatible System: Power plant DCS, chemical, papermaking legacy system transformation project
Core Function: Dedicated MasterBus300 communication module for AC800M DCS system. It serves as inter‑system gateway, realizes high‑speed data interconnection between AC800M and Advant Controller 400, MasterPiece200 series old controllers, completes cross‑system data exchange and interlock signal transmission, supports hybrid operation and system migration of new and old DCS equipment.

Product Details
The CI855K01 3BSE018106R1 is MasterBus300 inter‑system communication interface module for ABB AC800M and 800xA DCS control system。
This module connects to the CEX‑Bus backplane of AC800M rack, equipped with dual RJ45 Ethernet interfaces, adopts ABB proprietary MasterBus300 protocol. It is mainly used for data interaction between new AC800M controller and legacy Advant series controllers, realizes cross‑controller data sharing and safety interlock signal transmission, supports hybrid running of new and old control systems, and provides reliable technical support for system step‑by‑step migration reconstructionABB Group。
It supports hot‑swap function, modules can be replaced online without DCS system shutdown. Front‑panel LED indicators display power supply, network link and fault alarm information for quick on‑site troubleshooting. Built‑in communication diagnosis function can detect network interruption and data transmission abnormality, and upload fault information to DCS controller.
Conformal coated circuit board enhances anti‑interference performance, adapts to complex electromagnetic environment of industrial site. It occupies two rack slot positions, and is installed in standard AC800M rack.
Widely used in renovation and maintenance projects of power, chemical and papermaking industries for upgrading legacy Advant DCS systems.
It is important spare hardware for cross‑system communication loop debugging and defective CI855K01 module replacement.