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ABB CI867 (3BSE043661R1) is a compact, DIN-rail mounted communication interface module belonging to ABB’s 800-series, designed to extend connectivity for AC 800M controllers and 800xA DCS systems. It integrates a dedicated communication processor with 128 MB RAM / 256 MB Flash, enabling multi-protocol data handling and high-speed transmission up to 100 Mbps. The module provides dual Ethernet ports for network redundancy and load balancing, plus an RS485 interface for legacy Modbus RTU devices. Connecting to the controller via the CEX bus, it supports hot-swapping and redundant configurations to eliminate downtime during maintenance. Certified CE/UL, it operates reliably in harsh industrial environments with high vibration and electromagnetic interference.

The CI867 delivers robust Modbus TCP connectivity with the following capabilities:

Modbus TCP Master/Slave Operation: Supports Modbus function codes for reading/writing coils, discrete inputs, holding registers, and input registers. The controller can poll multiple slave devices or respond to requests from external masters.

Dual Ethernet Channels: Channel 1 supports 10/100 Mbit/s for primary communication; Channel 2 provides additional flexibility (typically 10 Mbit/s). Ports use standard RJ-45 connectors.

High Data Throughput: Independent of controller CPU load, enabling efficient exchange of large data volumes (up to thousands of signals per second depending on configuration).

Module Redundancy: Supports 1+1 redundancy configurations for increased availability in critical applications.

Hot Swap Capability: The module can be replaced during operation without shutting down the controller or other CEX bus modules.

Network Integration: Seamless connection to plant Ethernet networks, with support for standard IP addressing, routing, and integration into switched Ethernet infrastructures.

Diagnostics and Supervision: Detailed status information, including link status, communication errors, and Modbus exception codes, is available in the controller and System 800xA for troubleshooting and asset monitoring.

CEX Bus Compatibility: Mounts on the AC 800M CEX bus; up to 12 communication modules per controller (configuration-dependent).

These features simplify integration of Modbus TCP-compatible equipment while maintaining high performance and system reliability.

• Model: CI867 | Part No.: 3BSE043661R1

• Series: ABB AC 800M, 800xA DCS, Symphony Plus

• Type: Dual-Channel Ethernet Communication Interface Module

• Ethernet Ports: 2×RJ45 (Ch1: 100 Mbps full-duplex; Ch2: 10 Mbps half-duplex)

• Serial Interface: RS485 (Modbus RTU)

• Supported Protocols: Modbus TCP/IP, Modbus RTU, PROFINET IO, TCP/IP, OPC UA

• Processor: Dedicated communication processor

• Memory: 128 MB RAM, 256 MB Flash

• Redundancy: 1+1 parallel redundancy (network/module)

• Hot-Swappable: Yes (CEX bus, no system shutdown)

• Status Indicators: LED for link, activity, fault

• Power Supply: 24V DC ±20%, 5–10 W (backplane-powered)

• Operating Temp: -40°C to +70°C

• Isolation: 500V DC (communication/backplane)

• Protection Class: IP20

• Dimensions (W×H×D): 100 × 160 × 40 mm

• Weight: ~0.35 kg

• Lifecycle: Active / Widely used in new & legacy systems

• What is ABB CI867 3BSE043661R1?It is a dual-channel Ethernet communication interface module for ABB AC 800M/800xA systems, supporting Modbus TCP/RTU and PROFINET IO.
• What controllers is it compatible with?ABB AC 800M series controllers, 800xA DCS, and Symphony Plus platforms via the CEX bus.
• Does it support redundancy?Yes, it supports 1+1 module redundancy and dual Ethernet ports for network failover.
• Is it hot-swappable?Yes, designed for hot-swap via the CEX bus—replace modules without shutting down the system.
• What protocols does it support?Modbus TCP/IP, Modbus RTU (RS485), PROFINET IO, OPC UA, and standard TCP/IP.
• What is the Ethernet speed?Channel 1: 100 Mbps full-duplex; Channel 2: 10 Mbps half-duplex for redundant or secondary networks.

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