Description
ABB BC810K02 3BSE031155R1 CEX-Bus Interconnection Unit
Product Introduction
When an AC 800M installation uses multiple communication interfaces and availability matters, simply extending the CEX-Bus is not always enough. ABB BC810K02 provides the interconnection hardware needed to divide the CEX-Bus into separate segments while supporting redundant communication-interface arrangements. ABB identifies it as a CEX-Bus Interconnection Unit for the AC 800M controller family, with support for online CPU replacement and hot-swapping.
The ABB BC810K02 package is supplied as a complete hardware kit rather than a single BC810 board: two BC810 interconnection units, two TP857 baseplates, one 1-meter TK851 interconnection cable, and two TB850 terminators are included. The assembly uses a 24 VDC external supply and is intended for AC 800M architectures where CEX-Bus segmentation and controller availability are part of the design.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | BC810K02 |
| ABB Article Number | 3BSE031155R1 |
| Manufacturer | ABB |
| System | AC 800M |
| Product Type | CEX-Bus Interconnection Unit kit |
| Bus | CEX-Bus |
| Redundancy | Supported |
| High Integrity | Yes |
| Hot Swap | Supported |
| Supply Voltage | 24 VDC nominal |
| Supply Voltage Range | 19.2–30 VDC |
| Current Consumption | 50 mA typical / 70 mA maximum |
| Typical Power Dissipation | 1.2 W |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -40 to +70 °C |
| Relative Humidity | 5–95%, non-condensing |
| Protection Rating | IP20 |
| Width | 59 mm |
| Height | 185 mm |
| Depth | 127.5 mm |
| Package Weight | Approximately 1.5 kg |
| Installation | DIN-rail based AC 800M hardware |
| Hazardous Location | cULus Class 1, Zone 2 / AEx nA IIC T4 / Ex nA IIC T4Gc X |
| Marine Certifications | ABS, BV, DNV, LR, CCS |
| Kit Contents | 2 × BC810, 2 × TP857, 1 × TK851, 2 × TB850 |
ABB’s current hardware selector lists the 24 VDC input range, 50 mA typical/70 mA maximum consumption, IP20 rating, environmental limits, dimensions, redundancy, and hot-swap capability.
Major Features and Advantages
CEX-Bus Segmentation
The primary purpose of the BC810 is to improve the availability architecture of the AC 800M CEX-Bus. ABB describes the CEX-Bus as the expansion bus used to extend the controller’s onboard communication capability with communication interface units. The BC810 allows the bus to be divided into separate physical segments.
This distinction matters during system design. The BC810K02 is not itself a CPU and should not be specified as a replacement for a PM8xx processor. Its job is associated with the infrastructure around the processor and CEX-Bus communication interfaces.
BC810K02
Redundant Communication Interface Support
BC810K02 is designed for systems where redundant communication interfaces are required. ABB identifies redundancy as a general feature and describes the use of two interlinked BC810 units together with a primary/backup CPU pair. In this arrangement, the hardware forms part of the architecture that allows CPU baseplate replacement without disturbing CEX traffic.
That makes the part particularly relevant to AC 800M installations where maintenance activities must be planned around process availability rather than simply around hardware replacement.
Online CPU Replacement
One of the more important practical features is support for online replacement of the CPU baseplate in the applicable redundant architecture. ABB specifically notes that, with two interlinked units and a primary/backup CPU pair, the CPU baseplate can be replaced without disturbing CEX traffic.
There is an important qualification: this does not mean that every replacement can be performed without process impact. ABB notes that replacing the itself stops traffic to the connected CEX segment. Engineers should therefore distinguish between online CPU replacement capability and replacement of the CEX-Bus interconnection hardware itself.
Complete Installation Kit
is useful from a procurement standpoint because ABB defines the package contents clearly. The kit contains two interconnection units, two TP857 baseplates, a TK851 1-meter interconnection cable, and two TB850 CEX-Bus terminators.
That is worth checking before placing a maintenance order. Ordering a bare when the project specification calls for the kit can leave required baseplates, cable, or termination hardware missing from the installation package.
External 24 VDC Supply
The uses an external 24 VDC supply, with ABB specifying a 19.2–30 VDC operating range. Typical current consumption is 50 mA, with a maximum of 70 mA at 24 VDC.
For panel design, the current figure should not be confused with the total power budget of the associated AC 800M controller, communication interfaces, or field I/O. Those loads must be calculated separately.
Application Scenarios & Field Pain Points
- AC 800M redundant controller systems: is applicable where redundant CPU and communication-interface architectures require CEX-Bus interconnection and segmentation.
- Communication-interface redundancy: It can be used where multiple CEX-Bus communication interfaces need a higher-availability architecture. ABB specifically identifies support for redundant communication interfaces.
- Maintenance-sensitive process plants: Online CPU replacement capability can be valuable during planned maintenance because the applicable redundant architecture can preserve CEX traffic while the CPU baseplate is replaced.
- AC 800M modernization projects: During a controller replacement or cabinet refurbishment, should be checked against the existing PM8xx processor type, CEX-Bus arrangement, baseplates, terminators, and redundancy scheme rather than treated as a generic communication accessory.
Field note: One common procurement mistake is specifying “” when the project actually requires / 3BSE031155R1. The latter is a defined kit containing multiple installation components. Confirm the bill of materials before ordering.
Compatible / Related Products
- ABB PM857 — AC 800M processor supported by the architecture.
- ABB PM861A — AC 800M CPU supported with .
- ABB PM862 — AC 800M processor compatible with .
- ABB PM863 — AC 800M processor compatible with .
- ABB PM866 / PM866A — AC 800M processor families listed by ABB for use.
- ABB PM867 — AC 800M processor supported by .
- ABB PM891 — high-performance AC 800M processor; ABB notes that is required separately for hot replacement of the PM891 processor in the relevant redundant configuration.
- TP857 — 60 mm-wide baseplate included in the kit.
- TK851 — 1-meter interconnection cable included in the kit.
- TB850 — CEX-Bus terminator, two units included with .
Compatibility should be checked against the exact AC 800M hardware revision and installed CEX-Bus architecture before substitution.
Engineer’s Guide: Field Pitfalls to Avoid
1. Do not confuse with
The bare and the are not the same procurement unit. contains two units plus TP857 baseplates, TK851 cable, and TB850 terminators.
2. Do not treat it as a standard communication protocol module
is infrastructure for the CEX-Bus. It is not a PROFIBUS, Modbus, Ethernet, or EtherNet/IP interface by itself. The actual external communication function depends on the communication-interface units connected to the CEX-Bus.
3. Check the redundancy architecture
The online CPU replacement feature depends on the applicable redundant architecture, including two interlinked units and a primary/backup CPU arrangement. It should not be interpreted as an unconditional hot-replacement capability for every AC 800M installation.
4. Remember that replacement can interrupt CEX traffic
ABB explicitly distinguishes CPU baseplate replacement from replacement. Replacing the itself stops traffic to the connected CEX segment. Maintenance planning should account for that difference.
5. Verify the complete kit before accepting delivery
For a order, verify the presence and identification of the two units, two TP857 baseplates, TK851 cable, and two TB850 terminators. Missing termination or interconnection hardware can turn an apparently complete spare into an incomplete installation package.
FAQ
Is ABB a CPU module?
No. is a CEX-Bus Interconnection Unit kit for the AC 800M controller family. Its function is associated with CEX-Bus segmentation, redundancy, and availability rather than processor execution.
What is included in ?
ABB specifies two interconnection units, two baseplates, one interconnection cable with a 1-meter length, and two CEX-Bus terminators.
What processors can be used with ?
ABB lists PM857, PM861A, PM862, PM863, PM866, PM866A, PM867, and PM891 among the compatible AC 800M processors. The current ABB data sheet also lists PM864A and PM865 in its compatibility information.
Does support hot swapping?
Yes. ABB identifies hot swap as a supported performance feature. The relevant redundant architecture also supports online CPU replacement without disturbing CEX traffic. This should not be interpreted as permission to replace the itself without interrupting the connected CEX segment.
What power supply does require?
The specified external supply is 24 VDC nominal, with an operating range of 19.2–30 VDC. ABB specifies approximately 50 mA typical and 70 mA maximum current consumption at 24 VDC.
What should procurement verify before ordering a replacement?
Confirm the complete order code / 3BSE031155R1, the required kit contents, the installed AC 800M processor type, the CEX-Bus topology, and whether the application uses redundant communication interfaces. For used or surplus inventory, verify the actual contents and physical condition rather than assuming every listing contains the original factory kit.
Is suitable for a legacy AC 800M system?
It can be, provided the existing controller architecture and hardware revisions match the supported configuration. ABB continues to document within its AC 800M hardware information, but exact compatibility should be checked against the installed processor, CEX-Bus configuration, baseplates, and communication-interface units before making a field substitution.
Procurement Takeaway
ABB is an AC 800M CEX-Bus availability component, not a general-purpose communication module. Its value is in providing the physical and electrical infrastructure for segmented and redundant CEX-Bus architectures, including the applicable online CPU replacement arrangement. The exact kit contents are important: two units, two baseplates, cable, and two terminators.
For replacement procurement, match and 3BSE031155R1 against the existing bill of materials and cabinet architecture. Do not substitute a bare simply because the model name appears similar.
