ABB describes AC 800M as a rail-mounted controller family made up of CPUs, communication modules, power-supply modules and accessories. Correct replacement therefore starts with the complete product number and the installed hardware, software, network and redundancy configuration.
Need an AC 800M compatibility review? Send the full model number, article number, quantity and clear label photographs before requesting a quotation.
ABB's hardware selector presents AC 800M as a modular family with CPU choices ranging from single controllers to redundant configurations. Communication interfaces extend the controller to Ethernet-based protocols, serial communication, ABB equipment and heritage systems. S800 I/O is a distributed, modular process I/O system that communicates over industry-standard fieldbus technology. For that reason, a physically similar module should not be treated as interchangeable until the full configuration has been checked.
AC 800M selection becomes clearer when the requirement is viewed through four connected areas: controller identity, architecture, communication and field I/O.
Record the complete label, including the K01 or K02 package suffix. ABB assigns different article numbers to different processor packages, so the family name alone is not a precise order reference.
Identify whether the cabinet uses one CPU or a primary and backup pair. In AC 800M, redundancy can include the CPU, CEX-Bus, communication interfaces and S800 I/O, together with the relevant baseplates and cables.
Match the communication interface to the installed protocol and required role. ABB identifies interfaces by protocol, master or slave function, line redundancy and module redundancy; connector appearance is not a compatibility test.
Treat the I/O module and Module Termination Unit as a matched assembly. Confirm the supported I/O, connection method, channel count, voltage class and field-wiring arrangement before replacement.
ABB processor packages may include CPUs, baseplates, terminators, interconnection cables and backup batteries. Confirm the exact K01 or K02 suffix, article number and required package contents before ordering.
Product image: ABB official hardware selector, PM862K02.
| Model | ABB Classification | Selection Point | Verify Before Ordering |
|---|---|---|---|
| PM857K02 | Redundant High Integrity processor kit | ABB lists CPU redundancy and High Integrity capability. | Safety configuration, SM812 and required certified software. |
| PM862K02 | Redundant processor kit | ABB lists redundant CPU support and built-in redundant Ethernet ports. | Article number, software version and complete kit contents. |
| PM866AK01 / PM866AK02 | Single / redundant processor packages | ABB lists K01 as non-redundant and K02 as redundant. | Exact suffix, article number and system configuration. |
| CI854B | PROFIBUS DP-V1 communication interface | ABB lists master operation, line redundancy and module redundancy. | Network role, firmware and redundancy design. |
| CI867A | Modbus TCP communication interface | ABB lists master/slave operation and module redundancy. | System version, Ethernet design and exact article number. |
| BC810K02 | CEX-Bus interconnection unit kit | ABB uses BC810 to divide the CEX-Bus into separate segments and improve availability. | Supported CPU, redundant arrangement and kit contents. |
Product links above are included only where an exact matching Stockoems product page was found. Unlinked models require availability confirmation.
Provide the full model and ABB article number, quantity, condition, destination and required date. Add clear label photographs, installed software version, processor configuration, communication protocol, I/O and MTU numbers, and any mandatory approval or documentation requirement.
Avoid ordering from the family name alone, omitting a K01/K02 suffix, assuming a similar communication interface supports the same protocol, overlooking controller software compatibility, or matching an S800 I/O module without checking its MTU and field wiring.
ABB lists PM866AK01 as a non-redundant package and PM866AK02 as a redundant package with different article numbers. Treat them as different configurations and verify the installed system before ordering.
Use the complete model, suffix and ABB article number from the label, then compare the installed baseplate, software version, network and redundancy configuration with the official hardware information.
Do not decide from appearance alone. ABB identifies CI854B as a PROFIBUS DP-V1 master with specified redundancy capabilities. The protocol, role, firmware and controller configuration must all match.
Use ABB's compatibility information for the exact I/O and MTU models. ABB notes that MTUs differ by connection, channels, voltage, mounting and supported I/O, and use mechanical keying to help ensure the correct module is installed.
Send the full model and article number, quantity, delivery destination, clear label photographs and the relevant system, redundancy, communication and documentation requirements.
Browse the Stockoems ABB product category to review available controllers, communication modules and related industrial automation parts. Always use the complete model and article number when requesting availability or compatibility confirmation.
A recent Stockoems warehouse and outbound view, showing ABB items prepared for inventory handling and shipment.
Send the model, ABB article number, quantity and label photographs. We will review the requested item before quotation.
