ABB BC810K02 CEX-bus Interconnection Unit
The ABB BC810K02 CEX-bus Interconnection Unit (3BSE031155R1) is a high-quality, reliable component designed for seamless communication and power distribution within industrial automation systems. Engineered by ABB, a global leader in automation and control solutions, this unit is built to deliver consistent performance in demanding industrial environments.
Powered by a nominal 24 V DC supply (variation between 19.2 V and 30 V DC), the ABB BC810K02 CEX-bus Interconnection Unit ensures stable operation with a typical power consumption of 50 mA (maximum 70 mA). Its low power dissipation of only 1.2 W contributes to energy efficiency and reduced operational costs, making it an excellent choice for facilities prioritizing sustainability.
The unit features a rugged construction with an IP20 protection rating in accordance with EN60529 and IEC 529 standards, offering reliable defense against dust and contact hazards. It operates efficiently in temperatures ranging from +5°C to +55°C and can be stored between -40°C and +70°C, ensuring long service life even under variable environmental conditions.
Measuring approximately 12.75 cm x 5.9 cm x 18.5 cm and weighing just 1.5 kg (shipping weight 2.5 kg), the ABB BC810K02 CEX-bus Interconnection Unit is compact yet robust. Its lightweight design simplifies installation and integration into existing control systems without compromising durability or reliability.
Applications for this interconnection unit span across multiple industries, including power generation, refining, petrochemicals, midstream and upstream oil & gas, manufacturing, and processing plants. It is particularly well-suited for environments requiring high-speed data exchange and reliable signal transmission between control devices.
With ABB’s commitment to innovation and quality, the ABB BC810K02 CEX-bus Interconnection Unit stands out as a dependable choice for engineers and maintenance teams looking to enhance the reliability and efficiency of their control networks.
Whether for a new system installation or as a replacement component, this interconnection unit ensures optimal connectivity, reduced downtime, and consistent operational performance across the plant’s automation backbone.
Compatibility with ABB Control Systems
The BC810K02 CEX-bus Interconnection Unit is used within ABB’s AC 800M series of controllers, compatible with processor modules including PM857, PM861A, PM862, and PM864A. The unit builds redundant CEX-bus communication links between controller and I/O, and the standard supply kit (3BSE031155R1) bundles two BC810 interconnection units, two TP857 baseplates, a TK851 interconnection cable, and two TB850 CEX-bus terminators, so a complete dual-link redundant path can be assembled from a single order.
Redundancy and Online Maintenance
Because the kit contains two interconnection units forming a dual-link redundant system, a fault on one CEX-bus link does not interrupt controller-to-I/O communication, and this redundancy is what allows online replacement of a CPU or backplane module without shutting down the process. This capability is particularly valued in continuous-process plants — refineries, gas plants, and power stations — where an unplanned controller outage carries a high production cost.
Technical Specifications
| Part number | 3BSE031155R1 (BC810K02) |
| Compatible controllers | ABB AC 800M: PM857, PM861A, PM862, PM864A |
| Nominal supply voltage | 24 V DC (19.2-30 V DC range) |
| Power consumption | Typical 50 mA / 1.2 W; maximum 70 mA at 24 V DC |
| Protection rating | IP20 (EN 60529 / IEC 529) |
| Operating temperature | +5°C to +55°C |
| Storage temperature | -40°C to +70°C |
| Relative humidity | 5% to 95%, non-condensing |
| Dimensions | Approx. 127.5 x 59 x 185 mm |
| Weight | Approx. 1.4-1.5 kg (kit with base) |
| Kit contents | 2x BC810, 2x TP857 baseplate, TK851 cable, 2x TB850 terminator |
Industrial Applications
The BC810K02 is deployed wherever an AC 800M-based automation system requires a redundant CEX-bus link between the controller and its I/O subsystem, including refinery process control, gas processing plant automation, power generation control rooms, petrochemical batch and continuous process units, and manufacturing plant SCADA/DCS integration. Because the CEX-bus carries the real-time data traffic between the controller and every connected I/O module, a failure at this link can affect the entire control loop for the modules downstream of it — which is precisely why ABB designed the redundant dual-BC810 architecture, and why plants standardize on the redundant kit rather than a single non-redundant unit for critical process areas.
Ordering and Verification
Before ordering a replacement BC810K02, confirm the controller model (PM857/PM861A/PM862/PM864A), the existing baseplate part number, and whether the installation uses the standard or Ex-rated BC810 variant (3BSE031154R1), since the Ex-rated unit is a distinct product for hazardous-area cabinets. Seven Star LLC checks these details against the customer’s system documentation or an existing nameplate photograph before confirming an order, avoiding a mismatch between the new interconnection unit and the installed AC 800M hardware, and we can arrange delivery to your site anywhere in Oman or the wider GCC region on a schedule that fits your planned maintenance window.
Related AC 800M Components
The BC810K02 is typically ordered alongside other AC 800M backplane and communication hardware — TP830/TP857 baseplates, TB806/TB840 series terminal blocks, and S800/S900 I/O modules — as part of a complete controller cabinet refresh or expansion. Seven Star LLC maintains sourcing relationships across the ABB Advant/AC 800M spares ecosystem, so a single RFQ for a BC810K02 replacement can be extended to cover the wider set of modules a maintenance team may need for the same cabinet.
Why Seven Star LLC
Seven Star LLC supplies genuine ABB BC810K02 CEX-bus Interconnection Units and related AC 800M spares to industrial customers across Oman and the wider GCC region. Because this component is a critical link in a redundant control system architecture, we verify the exact kit part number and controller compatibility against the customer’s installed AC 800M configuration before dispatch, and we can source the matching TP857 baseplates, TK851 cables, and TB850 terminators as a complete replacement set.
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