Description
- Model Number: CI840A
- Part Number: 3BSE041882R1
- Protocol: PROFIBUS DP-V1
- Redundancy: Supports Dual Redundancy (Line and Module)
- Interface: S800 I/O System
- Transmission Speed: Up to 12 Mbit/s
- Power Supply: 24 V DC (19.2 – 30 V)
- Power Consumption: 100 mA typical
- Max I/O Modules: Up to 12 modules per cluster
- Isolation: Galvanic isolation between fieldbus and logic
The CI840A 3BSE041882R1 is a high-performance PROFIBUS DP-V1 communication interface designed for the ABB S800 I/O system. This module acts as the primary gateway between a PROFIBUS master controller and the decentralized S800 I/O modules, providing efficient data exchange and comprehensive diagnostics. Engineered for high-availability environments, the CI840A supports full module redundancy, allowing two interfaces to be mounted on a single redundant baseplate to ensure continuous system operation even in the event of a hardware or network failure.
Comparison with Similar Models
The CI840A is a critical component within the S800 family, distinguished by its redundancy and protocol features:
- CI840A vs. CI801: The CI801 is a basic PROFIBUS interface that does not support module redundancy. The CI840A is the “Enhanced” version, specifically designed for mission-critical applications where redundant communication paths are required to prevent process downtime.
- CI840A vs. CI840 (Legacy): The “A” suffix in the CI840A denotes an updated hardware revision. While functionally compatible with the older CI840, the 3BSE041882R1 version features improved electronic components and better thermal management, making it more reliable for long-term use in high-density rack configurations.
- CI840A vs. CI830: The CI830 is an older S800 interface that primarily supports the PROFIBUS DP-V0 standard. The CI840A utilizes the DP-V1 standard, which allows for more complex acyclic communication, enabling advanced device parameterization and detailed diagnostic reporting directly through the fieldbus network.
