Products Description
ABB CI858 3BSE018135R1 PROFIBUS‑DP Communication Interface Module

Technical Specifications
Model: CI858
Part Number: 3BSE018135R1
Brand: ABB
Product Type: PROFIBUS‑DP fieldbus communication interface module
Matching System: ABB AC800M Controller, 800xA DCS System
Power Supply: Rack backplane 24VDC
Communication Interface: PROFIBUS‑DP fieldbus port
Transmission Rate: Up to 12 Mbps
Protocol: PROFIBUS‑DP
Installation Method: Rack slot mounting, hot‑swap supported
Operating Temperature: 5℃ ~ +55℃, non‑condensing
Protection Class: IP20
Weight: 0.24kg
Dimension: 72mm ×85mm ×32mm
Compatible System: Power plant DCS, petrochemical, papermaking process control cabinet
Core Function: PROFIBUS‑DP dedicated communication module for AC800M DCS system. It realizes high‑speed data interaction between DCS controller and PROFIBUS‑DP slave devices such as remote I/O, drives and field instruments, completes fieldbus data reading‑writing and protocol processing, ensures stable field‑bus communication for industrial control system.

Product Details
The CI858 3BSE018135R1 is PROFIBUS‑DP fieldbus communication interface module for ABB AC800M and 800xA DCS control system.
This module connects to ModuleBus backplane bus of AC800M rack, acts as PROFIBUS‑DP master station, and can connect large quantities of PROFIBUS‑DP slave devices including frequency converters, remote I/O modules and on‑site measuring instruments.
It supports hot‑swap function, module can be replaced online without shutting down the control system. Front‑panel LED indicators display power supply, bus status and fault alarm information for quick on‑site troubleshooting. Built‑in bus diagnosis function can detect bus short‑circuit, slave station dropout and communication abnormality, and upload fault information to DCS controller.
Compact structure saves cabinet installation space. Conformal coated circuit board improves anti‑interference capability, adapts to complex electromagnetic environment of industrial workshops.
Widely used in renovation and maintenance projects of power plant, petrochemical and papermaking DCS system.
It is important spare hardware for PROFIBUS‑DP fieldbus debugging and defective CI858 module replacement.