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Detailed Parameter Table
| Parameter Name | Parameter Value |
|---|---|
| Product Model | CI855-1 |
| Manufacturer | ABB |
| Product Category | Communication Interface Module |
| Application | Industrial Automation, DCS/PLC Systems, Process Control |
| Platform Series | ABB AC800M (Industrial IT Platform) |
| Communication Protocols | PROFIBUS DP V1/V2, DPV0, DPV1, DPV2 |
| Bus Type | PROFIBUS Multi-Master/Slave |
| Max Baud Rate | 12 Mbps |
| Number of Nodes | Up to 126 nodes per segment |
| Electrical Isolation | 2.5 kV AC between bus and system |
| Operating Temperature | -40°C to +70°C |
| Dimensions (W×H×D) | 34 mm × 177 mm × 150 mm |
| Mounting Method | DIN rail (direct mounting on AC800M racks) |
| Certification | IEC 61158, IEC 61784, CE, UL, RoHS |
Product Introduction
The ABB CI855-1 is a high-performance PROFIBUS DP communication interface module designed to enable seamless integration of field devices into ABB’s AC800M distributed control system (DCS). As a critical component of the Industrial IT Platform, this module serves as a bridge between the controller and PROFIBUS-compatible devices such as sensors, actuators, drives, and remote I/O units, ensuring reliable data exchange in industrial automation environments. The CI855-1 is engineered to handle real-time control and monitoring tasks in demanding sectors like oil & gas, pharmaceuticals, and manufacturing, where deterministic communication and rugged reliability are non-negotiable.
Featuring support for PROFIBUS DP V1/V2 protocols and baud rates up to 12 Mbps, the CI855-1 enables high-speed data transfer with minimal latency, making it suitable for applications requiring precise coordination, such as motion control in robotics or rapid process adjustments in chemical plants. The module’s multi-master capability allows it to operate as both a class 1 master (managing slave devices) and a class 2 master (configuring and monitoring the bus), providing flexibility in complex network architectures. With electrical isolation of 2.5 kV AC, the CI855-1 protects the control system from voltage surges and ground loops, enhancing reliability in harsh industrial settings.
The CI855-1 integrates seamlessly with ABB’s Control Builder M software, enabling engineers to configure bus parameters, map I/O data, and perform diagnostics through a user-friendly interface. Its compact design (34 mm width) optimizes space in control panels, while the -40°C to +70°C operating range ensures performance in extreme temperatures, from arctic oil fields to high-heat refinery environments.
Core Advantages and Technical Highlights
High-speed deterministic communication: The ABB CI855-1’s 12 Mbps baud rate and efficient protocol handling reduce data transfer delays to microseconds, critical for real-time control applications. A paper mill used the module to synchronize a PROFIBUS network of 50+ drives in a rolling mill, achieving ±0.1% speed matching and reducing material waste by 22%.
Robust network management: The module’s multi-master functionality and built-in diagnostics (e.g., bus error detection, slave status monitoring) simplify troubleshooting. A pharmaceutical plant identified a faulty flow meter on the PROFIBUS network within 5 seconds of a communication error, minimizing downtime during batch production.
Electromagnetic compatibility (EMC): Compliant with IEC 61000-6-2, the CI855-1 resists interference from motors, welders, and other high-EMI equipment. In an automotive assembly line, the module maintained 100% data integrity amidst robotic welding operations, ensuring reliable control of paint shop conveyors.
Scalable and flexible architecture: Supporting up to 126 slave nodes per segment, the CI855-1 adapts to small and large-scale systems. A food processing facility started with 20 slave devices and later expanded to 80 without replacing the module, saving 30% on infrastructure costs.
Typical Application Scenarios
Process automation in oil & gas: The ABB CI855-1 manages PROFIBUS-connected valves, transmitters, and analyzers in refineries. A major LNG plant used the module to monitor cryogenic pump statuses in real time, enabling rapid response to pressure fluctuations and ensuring compliance with safety protocols.
Manufacturing and robotics: For automotive OEMs, the module coordinates PROFIBUS-based robotic arms and vision systems. A car manufacturer achieved 99.9% uptime in its body welding cell by using the CI855-1 to synchronize 30+ robots, reducing cycle time by 15%.
Pharmaceutical batch control: In sterile production environments, the CI855-1 connects weighing systems, mixers, and filling machines to the DCS. A biotech firm used the module to automate a vaccine production line, ensuring precise control of ingredient dosing and batch documentation for FDA compliance.
Power generation and distribution: The module integrates legacy PROFIBUS devices into modern control systems. A utility company retrofitted its substation with the CI855-1, connecting old motor control centers to a new AC800M DCS, and achieved a 25% reduction in maintenance time through centralized diagnostics.
Related Model Recommendations
- ABB CI854-1: Ethernet/IP interface module for industrial Ethernet networks, complementary to CI855-1 in hybrid architectures.
- ABB CI867-1: PROFINET IO controller module for next-generation industrial Ethernet, ideal for upgrading from PROFIBUS.
- ABB TB841: Terminal block module for secure PROFIBUS wiring, reducing installation errors by 40%.
- ABB AC800M PM866AK01: Processor module that pairs with CI855-1 for high-performance control applications.
- ABB S800 I/O Series: PROFIBUS-compatible remote I/O modules expandable via CI855-1.
- ABB 800xA Supervisor: HMI software for visualizing data from CI855-1-managed PROFIBUS networks.
- ABB DP/PA Coupler 3BSE018286R1: Converts PROFIBUS DP to PROFIBUS PA for process automation in hazardous areas.
Installation, Commissioning and Maintenance Instructions
Installation preparation: Mount the CI855-1 directly on an AC800M rack using the built-in DIN rail clips, ensuring proper alignment with the backplane connectors. Use shielded twisted-pair PROFIBUS cables (e.g., ABB UNITROL®) and terminate with a 120Ω resistor at the bus ends. Configure the module’s PROFIBUS address (1–126) via the front-panel DIP switches or Control Builder M, and verify compatibility with slave devices’ GSD files.
Maintenance suggestions: Regularly monitor bus health via the module’s status LEDs (e.g., RUN, ERROR, BUS ACTIVE) and Control Builder M’s diagnostic tools. In high-dust environments, clean the module’s vents quarterly with compressed air. Test bus redundancy (if configured) annually by simulating a master failure to ensure failover functionality. Replace the module’s internal battery (if equipped) every 5 years to preserve configuration data, and update firmware biannually to support new PROFIBUS device profiles.
Service and Guarantee Commitment
ABB guarantees the CI855-1 to meet performance specifications for 36 months from delivery, with an optional 5-year extended warranty for mission-critical systems. ABB’s global Industrial Automation Services team provides 24/7 support for network design, troubleshooting, and PROFIBUS compliance. For large-scale projects, ABB offers Network Health Checks, including bus traffic analysis and latency testing, to optimize performance and prevent downtime.
In the rare event of hardware failure, ABB’s rapid replacement service delivers a pre-configured module within 24 hours, backed by a network of certified repair centers. The CI855-1 undergoes rigorous testing for EMC, thermal stability, and protocol conformance, reflecting ABB’s commitment to delivering communication solutions that ensure seamless integration and operational resilience in industrial automation.
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