ABB BC810 AC 800M CEX-Bus Interconnection Unit

Description

Product Introduction & Engineering Value

When an AC 800M controller is expanded with multiple communication modules, the CEX-Bus quickly becomes a critical part of overall system availability. The ABB BC810 is designed to divide the CEX-Bus into separate segments, reducing the impact of a communication fault and supporting high-availability controller configurations.

Rather than adding new process functions, the BC810 strengthens the communication infrastructure inside the controller cabinet. It is commonly installed in redundant System 800xA and AC 800M architectures where uninterrupted communication between CPUs and interface modules is a primary design objective.

Technical Specifications

Field Application & The “Trench” Experience

During a planned shutdown at a combined-cycle power station, engineers upgraded the communication network by adding redundant Ethernet interface modules to an existing AC 800M controller. Without CEX-Bus segmentation, replacing a CPU baseplate would interrupt every communication module connected to the bus.

Installing a pair of BC810 units separated the communication paths into independent CEX-Bus segments. During later maintenance, the standby CPU baseplate was replaced online while process communication remained available to the redundant network interfaces. That avoided an additional production outage and shortened the maintenance window.

Typical applications include:

• Boiler turbine coordinated control using redundant AC 800M controllers
• Continuous pulp digester process automation requiring redundant communication paths
• Petrochemical safety-related process control with multiple fieldbus interface modules

BC810

Transparency SOP: QA & Testing

Before shipment, every undergoes documented inspection procedures:

1. Verify ABB part number and hardware revision.
2. Inspect the TP857 connector interface and CEX-Bus contacts for mechanical wear.
3. Perform power-up verification using a compatible AC 800M controller.
4. Confirm CEX-Bus communication integrity under diagnostic testing.
5. Inspect housing, terminals, and mounting hardware.
6. Package the unit in anti-static materials with protective cushioning.

For refurbished inventory, functional verification is completed before the unit is approved for shipment.

The Veteran’s Tech Trap Guide

⚠️ Don’t confuse with a communication interface module.

The does not provide Ethernet, PROFIBUS, or Modbus connectivity. Its job is to organize and improve the availability of the internal CEX-Bus, which communication interface modules use.

⚠️ Verify controller compatibility first.

Although the supports many AC 800M processor models, compatibility depends on the specific CPU generation and system configuration. Always confirm the processor model before ordering.

PRO TIP:

If you’re planning redundant CPU maintenance, verify that the complete assembly—including the TP857 baseplate, TK851 interconnection cable, and CEX-Bus terminators—is installed correctly. Missing accessories are a common cause of commissioning delays.

⚠️ Replacing the affects the entire connected CEX segment.

Unlike replacing certain communication modules, removing a temporarily stops traffic on its connected CEX-Bus segment. Schedule replacement during an approved maintenance window.

Dynamic FAQ

Q1. What is the primary purpose of the ABB ?

The divides the AC 800M CEX-Bus into separate segments, increasing communication availability and supporting redundant communication interface architectures.

Q2. Can the be installed in a non-redundant controller?

Yes. Although it is commonly used in redundant systems, it can also be used where CEX-Bus segmentation is required for communication expansion.

Q3. Is the supplied with accessories?

Complete kits may include the TP857 baseplate, TK851 interconnection cable, and TB850 CEX-Bus terminators. Verify the package contents before ordering, especially if purchasing a replacement assembly.

Q4. Are New Surplus units genuine ABB products?

Yes. New Surplus inventory consists of unused original ABB hardware stored under controlled warehouse conditions. Each unit undergoes identity verification and visual inspection before shipment.

Q5. Does replacing a require application software changes?

No. Since the functions as a CEX-Bus interconnection unit rather than a controller or communication protocol module, replacing it normally does not require application logic changes. Hardware compatibility and system configuration should still be verified before commissioning.

Q6. Is warranty coverage available?

Yes. Both New Surplus and professionally refurbished units are available with warranty coverage. Warranty duration depends on the supplied condition and is confirmed in the quotation.