Introduction
The ABB CI856 (3BSE026055R3) is a communication interface that enables S100 I/O connectivity in AC 800M controllers. This guide covers its core specifications, compatibility, installation, and performance optimization. Engineers and system integrators will find practical advice for deploying this module in industrial automation systems.
Core Specifications
The CI856 connects to the CEX-Bus via a base plate (TP856) and supports up to five S100 I/O racks, each holding up to 20 I/O boards. It uses a Miniribbon (36-pin) connector and consumes a typical 24 V current of 120 mA. The module operates in temperatures from 0 to +55 °C and stores from -40 to +70 °C, with IP20 protection per EN60529 and IEC 529. Its dimensions are 59 mm wide, 185 mm high, and 127.5 mm deep, weighing 700 g including the base.
Compatibility and Integration
The CI856 works as a master device using ABB's S100 I/O communication protocol. It integrates with HI Controllers and supports hot swap functionality. The module does not require an external power source as it draws power from the processor unit via the CEX-Bus. Up to 12 units can be connected on the CEX bus, and the code locking device prevents mounting incompatible components.
Installation and Configuration
Mount the CI856 on a DIN rail using the TP856 base plate, which houses a ribbon connector for bus extender boards in S100 I/O racks. Ensure the operating environment stays within 0 to +55 °C and meets G3 corrosion protection per ISA 71.04. The module is CE-marked and complies with EU, UAE, and CN RoHS, as well as WEEE Directive 2012/19/EU. No additional wiring is needed beyond the CEX-Bus connection.
Performance Optimization
The CI856 allows reuse of existing I/O installations, including terminations and field wiring from ABB Master and Advant OCS systems. This reduces migration costs and downtime. Hot swap functionality enables board replacement without system shutdown, improving uptime. For best performance, limit the number of connected I/O racks to five and ensure proper ventilation around the module.
Frequently Asked Questions
How do I select the right CI856 for my application?
Consider the number of I/O points needed: the CI856 supports up to five racks with 20 boards each. Verify that your existing I/O installation uses ABB Master or Advant OCS systems to maximize reuse. Ensure the operating temperature stays within 0 to +55 °C and that the environment meets G3 corrosion standards.
What are the mounting requirements for the CI856?
Mount the module on a DIN rail using the TP856 base plate. The module dimensions are 59 mm wide, 185 mm high, and 127.5 mm deep. Allow adequate space for cable connections and airflow. The IP20 rating means it is suitable for clean, dry indoor environments.
Can the CI856 be integrated with existing systems?
Yes, the CI856 is designed to reuse existing I/O installations from ABB Master and Advant OCS systems. It connects to the CEX-Bus and supports up to five S100 I/O racks. The hot swap feature allows integration without system downtime.
What maintenance does the CI856 require?
Routine maintenance includes checking the CEX-Bus connection and ensuring the operating temperature stays within 0 to +55 °C. Inspect the module for dust or corrosion, especially in environments with G3-level contaminants. The hot swap capability simplifies board replacement when needed.
Support and Resources
Technical documentation for the CI856 includes manuals, wiring diagrams, and application notes. CtrlTechDaily offers support via phone and email. Visit www.ctrltechdaily.com for more resources and to discuss your specific automation needs.
