CI840A | PROFIBUS DP Slave Communication Interface

Product Model **CI840A**
Manufacturer ABB
Product Type PROFIBUS DP Slave Communication Interface
Input Voltage 24 VDC ±10%
Communication Protocol PROFIBUS DP-V1 (EN 50170)
Data Rate 9.6 kbps – 12 Mbps (auto-negotiating)
I/O Capacity Up to 244 bytes input/output (cyclic data)
Operating Temperature -25°C to +60°C
Certifications UL, CE, ATEX Zone 2, RoHS
Dimensions 155 x 129 x 56 mm (mounted on S800 I/O base)
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Description

Technical Specifications

Product Model **CI840A**
Manufacturer ABB
Product Type PROFIBUS DP Slave Communication Interface
Input Voltage 24 VDC ±10%
Communication Protocol PROFIBUS DP-V1 (EN 50170)
Data Rate 9.6 kbps – 12 Mbps (auto-negotiating)
I/O Capacity Up to 244 bytes input/output (cyclic data)
Operating Temperature -25°C to +60°C
Certifications UL, CE, ATEX Zone 2, RoHS
Dimensions 155 x 129 x 56 mm (mounted on S800 I/O base)

Key Features and Advantages

The **ABB CI840A** enables seamless integration of PROFIBUS DP devices into ABB’s 800xA control system. Its dual-port design supports line redundancy and daisy-chain topologies, with automatic baud rate detection. The module’s **FOUNDATION Fieldbus** compatibility allows hybrid network architectures, while integrated diagnostic LEDs (bus activity, error states) simplify troubleshooting. ABB’s **Control Builder** software provides configuration tools for GSD file management and data mapping.

Robust EMC protection (IEC 61326) ensures reliable operation in electrically noisy environments. The CI840A supports Class 1 DP master communication with 1 ms update times, ideal for real-time control. Hot-swappable design minimizes downtime during maintenance, and non-volatile memory retains configuration during power loss.

CI840A

Application Areas

Industrial automation networks integrating motor starters, HMIs, and sensors via PROFIBUS. Used in water treatment plants for valve control, automotive manufacturing for robotic cell integration, and oil/gas platforms for subsea device communication. Also deployed in batch processing systems requiring SIL 2 safety compliance.

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Installation and Configuration

**Installation**: Mount on S800 baseplate (SD821/SD822) using DIN rail. Terminate PROFIBUS networks with 220Ω resistors at both ends. Use shielded PROFIBUS cables (e.g., ABB 3KDW000190) and ground shields at one point. For Zone 2 installations, add IS barriers (e.g., MTL5044).

**Configuration**: Import GSD files into Control Builder. Assign PROFIBUS addresses via DIP switches (1-126). Validate parameter settings with **PROFIBUS DP Tester** software. Enable watchdog timers for fault detection.

Maintenance and Diagnostics

Monitor module health via 800xA System Status View. Perform annual bus termination checks using impedance meter (110-130Ω). Update firmware via CompactFlash card slot. Replace backup battery (CR2450) every 5 years to retain configuration. Use **ProfiTrace** for protocol analysis during communication faults.

Product Assurance

ABB’s **CI840A** undergoes 1,000-hour HALT testing (-40°C to +85°C). The 3-year warranty includes 24/7 global support through ABB’s **Automation Service Hub**. Compliance with NAMUR NE107 ensures standardized diagnostic alarms. Lifetime support guaranteed until 2035+ under ABB’s Long-Term Availability Program.

Note: For PROFIBUS DP-V2 (acyclic data) functionality, upgrade to CI840A V2.1 firmware. Always disconnect power before module replacement.

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