ABB CI873K01 3BSE058899R1 | Ethernet/IP Module | AC 800M DCS

Description

ABB CI873K01 3BSE058899R1 Ethernet/IP Communication Interface

Key Technical Specifications

ABB’s hardware documentation specifies CI873 as an Ethernet unit using EtherNet/IP, with 10/100Base-TX communication, RJ45 connection, and CEX-Bus power consumption of 160 mA typical at 24 VDC. The package includes the CI873 communication interface and TP867 baseplate.

Product Introduction

The is an EtherNet/IP communication interface for the AC 800M controller platform used with ABB System 800xA. It provides the communication path between the controller environment and external EtherNet/IP equipment, allowing compatible field devices and automation equipment to exchange control and diagnostic data through an industrial Ethernet network. ABB categorizes CI873 specifically as an EtherNet/IP Communication Interface, not as a processor or conventional I/O module.

The package consists of the CI873 communication interface and a TP867 baseplate. The CI873 uses 10/100Base-TX Ethernet and an RJ45 connection, while the module receives its operating power through the AC 800M CEX-Bus. This makes the unit particularly relevant to plants maintaining AC 800M controllers where EtherNet/IP connectivity is part of the existing control architecture.

CI873K01 3BSE058899R1

Application Scenarios & Field Pitfalls — The Engineer’s Perspective

Engineering Pain Point

When an AC 800M system loses communication with an EtherNet/IP device, the is only one part of the communication path. The controller configuration, CEX-Bus, TP867 baseplate, Ethernet cabling, device configuration, network topology, and EtherNet/IP connection parameters all need to be considered before declaring the interface defective.

Typical Applications

• AC 800M EtherNet/IP integration — Connects compatible EtherNet/IP equipment to an ABB controller.
• System 800xA control systems — Used as part of the AC 800M communication architecture.
• Remote device communication — Supports communication with compatible external Ethernet-based automation equipment.
• DeviceNet integration through LD 800DN — ABB lists the LD 800DN EtherNet/IP-to-DeviceNet linking device specifically for use with .
• Legacy DCS maintenance — Provides replacement hardware for installed AC 800M systems using the architecture.

Technical Pitfalls

1. Verify the part number before purchasing.
   This is the biggest issue with this listing. ABB’s catalog identifies as 3BSE056899R1, while your supplied number is 3BSE058899R1. Do not silently treat those two numbers as interchangeable. Verify the number printed on the physical label and, preferably, the ABB material list for the target controller.
2. Do not confuse with CI873A.
   ABB later introduced CI873A/CI873AK01 variants with different software-version compatibility. ABB’s newer System 800xA catalog specifies CI873AK01 for particular 800xA and Compact Control Builder releases.
3. It is not an AC 800M CPU.
   is a communication interface. Processor functions remain with the AC 800M controller. Several reseller pages incorrectly describe as a controller/CPU or assign it unrelated Modbus/PROFIBUS functions.
4. Do not assume Modbus TCP from the Ethernet connector.
   The OEM classification is specifically EtherNet/IP. An RJ45 physical interface does not mean every Ethernet protocol is supported by the module.
5. Check the CEX-Bus architecture.
   receives power and communicates with the controller system through the CEX-Bus. A communication fault may therefore originate in the CEX-Bus arrangement rather than the Ethernet cable itself.
6. Check the TP867 baseplate.
   The K01 package includes the and . When sourcing a complete package, confirm whether the required baseplate is included; when replacing only the module, verify the existing baseplate and connector condition.
7. Configuration compatibility matters.
   EtherNet/IP device definitions, controller configuration, firmware/software versions, and network settings should be checked before commissioning a replacement. A module that establishes a physical Ethernet link is not necessarily a drop-in application replacement.

Related Products

• ABB CI873A — Later hardware generation; software and system-version compatibility must be checked.
• ABB CI873AK01 — Newer K01 package designation associated with CI873A and .
• ABB LD 800DN — EtherNet/IP-to-DeviceNet linking device specifically listed for .
• ABB CI868K01 — IEC 61850 communication interface using ; different protocol and application.
• ABB CI871K01 — PROFINET IO interface; different industrial Ethernet protocol.
• ABB CI860K01 — FOUNDATION Fieldbus HSE interface; different fieldbus architecture.
• ABB CI869K01 — Advant Fieldbus 100 interface; intended for a different ABB legacy communication architecture.

Procurement Note

For this specific request, I recommend recording the item as:

ABB — EtherNet/IP Communication Interface — verify supplied P/N 3BSE058899R1 against the hardware label.

The ABB documentation I found identifies the standard package as 3BSE056899R1, not 3BSE058899R1. That difference is significant enough that I would not approve a replacement solely from the model number. Check the physical label, controller project documentation, hardware revision, installed 800xA/Control Builder version, and whether the existing installation uses the original or a later CI873A generation.

For used or refurbished inventory, inspect the RJ45 connector, CEX-Bus connector, module housing, status LEDs, interface, and label. Functional testing should verify controller recognition, EtherNet/IP network link, device connection, cyclic data exchange, and diagnostic behavior rather than relying on a simple power-on test.