ABB CI857K01 | Replacement for Legacy AC 800M Comms

Description

Product Introduction

PROFINET is the protocol that broke the fieldbus argument, and the CI857K01 is where ABB’s AC 800M joins it. This module sits in the I/O rack and speaks PROFINET IO to remote I/O and field devices — the assembly number 3BSE018144R1 is what your maintenance records reference. Single slot, backplane connection, no external gateway.

What matters here is firmware rev, not the faceplate. The AC 800M controller and the CI857K01 communicate across a software boundary, and mismatched firmware shows up as configuration errors or missing devices — not clean faults. Compare it to the Profibus CI810B interface and the difference is protocol generation and device support. Verify the assembly number and firmware against your Control Builder project before commissioning.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions

Can I swap this module with the rack powered?
No. Kill rack power, confirm zero voltage, then pull the module. AC 800M I/O modules are not hot-swap rated. A live pull can fault the PROFINET segment and every device on it.

How do I confirm the firmware matches my project?
Check the module firmware version in Control Builder against your project documentation and controller rev. Mismatches show up as configuration errors or missing devices, not clean fault codes. Consult OEM tech support if the rev differs.

What does the bench test cover?
Inbound: OEM packing trace, anti-counterfeit verification, visual inspection. Live: power-on self-test, AC 800M backplane handshake, PROFINET device simulation, and insulation resistance above 10MΩ. Units ship with a QC Passed tag and anti-static sealing. Verified functional — not a blanket fail-proof guarantee.

The controller can’t see a PROFINET device — module or network?
Check cable and switch configuration first. Verify the device name and IP settings match what Control Builder expects — PROFINET device naming is strict, and a mismatch produces exactly this symptom. To be frank, most “dead CI857K01” calls trace to device naming or switch settings.

Will my existing Control Builder configuration load into this module?
Same revision, typically yes. Across revisions, verify the Control Builder version and review any flagged device configuration differences. Consult OEM tech support if the configuration fails to load.

What’s the lead time on surplus stock?
Usually 2–5 business days after QC release, depending on batch. Ask for the test report and lot trace. For AC 800M comms modules, firmware rev and project compatibility matter more than the price sheet.

What’s the return policy if the firmware doesn’t match?
Depends on the seller. Get the window, restocking fee, and exchange-only terms in writing. Most suppliers of surplus ABB modules offer exchange, not refund. Confirm the assembly number and firmware rev against your project before ordering.