ABB CI840A 3BSE041882R1 PROFIBUS DP Communication Interface Module

The ABB CI840A 3BSE041882R1 is a PROFIBUS DP master communication interface module for ABB AC 800M DCS systems. It connects the AC800M controller to PROFIBUS DP field peripherals, realizes cyclic real‑time I/O data transmission, and supports interconnection with remote I/O, variable‑frequency drives and field‑bus intelligent instruments in process automation plants.

This S800 I/O rack‑mounted module supports hot‑swap and hardware communication diagnosis, with reliable anti‑interference performance for industrial field environments. Original production has been discontinued. It is widely supplied as aftermarket spare parts for chemical, power and pulp‑paper DCS control cabinet maintenance and fieldbus network renovation projects.

Main Specifications

1. Brand:ABB; Model:CI840A, Part No:3BSE041882R1; Type:PROFIBUS DP Master Communication Module
2. Applicable Platform:ABB AC 800M controller, S800 I/O station chassis
3. Fieldbus Protocol:PROFIBUS DP V0/V1, operates as bus master station
4. Connection Capacity:Supports connection to multiple PROFIBUS DP slave devices on one bus segment
5. Diagnostic Function:Bus communication status monitoring, slave station fault detection and module self‑diagnosis
6. Installation:Plug‑in hot‑swap installation inside S800 I/O rack with matching base terminal unit
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Act as PROFIBUS DP master station for AC800M DCS system to communicate with distributed field‑bus slave devices.
2. Complete cyclic real‑time exchange of input and output data between controller and PROFIBUS DP drives, remote I/O and sensors.
3. Support acyclic parameter read‑write access for commissioning, parameter configuration and device diagnosis of field equipment.
4. Detect bus interruption, slave station offline and module hardware faults, and upload alarm information to the DCS controller.
5. Allow hot‑swap replacement without powering down the S800 I/O station, reducing system maintenance downtime.
6. Serve as the key PROFIBUS fieldbus gateway hardware for ABB AC800M distributed control racks.

Application Scenarios

1. Chemical plants, power plants, pulp and paper mills and other continuous process industrial automation sites.
2. Spare communication module replacement and routine maintenance of existing ABB AC800M DCS control cabinets.
3. Technical renovation and fieldbus networking upgrade of aging S800 I/O distributed control systems.
4. On‑site troubleshooting and replacement of faulty PROFIBUS interface modules on continuous process production units.
5. Spare‑parts stocking for system integrators and DCS process‑control automation maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete ABB S800 series fieldbus communication hardware.

FAQ

1. Q:Which control system is CI840A 3BSE041882R1 suitable for?
   A:It is designed for ABB AC 800M controller and S800 I/O station, not compatible with other ABB DCS platforms.
2. Q:Does CI840A support PROFIBUS slave mode?
   A:It works as PROFIBUS DP master module, it cannot be configured for slave station operation mode.

3. Q:Is this PROFIBUS communication module still in original production?
   A:ABB original manufacturing has been discontinued, only tested surplus and refurbished spare units are available.