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Key Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 3BSE020520R1 |
| Module Type | CI810B AF 100 fieldbus communication interface |
| Protocol | AF 100 (Advant Fieldbus 100) |
| Channel Count | 2 × twisted-pair modem channels |
| Controller Family | AC 800M / System 800xA CEX-Bus slot |
| Included Accessories | TB807 bus terminal 3BSE008538R1; power connector 3BSC840098R1 |
| Base System Software | Version 1.5 |
| Exchange Number | EXC3BSE020520R1 |
| Typical Application | Dataset communication to Advant Controller 450 / MasterPiece 200 |
| Condition | New surplus / verified used (availability varies) |
Product Introduction
Legacy AF 100 networks do not die quietly. They keep running in power plants, pulp mills, and old process units long after the original documentation has disappeared. The ABB CI810B 3BSE020520R1 is one of those modules that only becomes important when the plant needs to talk to an existing Advant Controller 450, MasterPiece 200, or an older AC 450 segment that still depends on AF 100 dataset communication.It is not a general-purpose Ethernet card. It is a dual AF 100 twisted-pair modem interface for the AC 800M CEX-Bus. Engineers reach for it when a migration is partial, when an old controller must stay online, or when a spare AF 100 interface fails during a turnaround. The card usually ships with the TB807 bus terminal and the 3BSC840098R1 power connector, and many units carry base system software version 1.5. That matters, because firmware mismatches on legacy ABB communication modules can create subtle dataset timeouts rather than clean failures.
Quality SOP & Tech Pitfalls
The Lab Report (SOP):
- Visual inspection: verify CI810B label, 3BSE020520R1 part number, and serial number.
- Counterfeit check: compare PCB finish, connector quality, and label font against known originals.
- Accessory verification: confirm TB807 3BSE008538R1 and 3BSC840098R1 power connector are present.
- Insulation check: measure power terminal to chassis with a Fluke 115 or equivalent.
- Live rack test: seat the module in a compatible AC 800M CEX-Bus slot and verify power and bus recognition.
- Firmware logging: record base system software version (commonly 1.5) and any visible revision marks.
- Anti-static packing with photo documentation before dispatch.
The Engineer’s Warning (Pitfalls):
Do not confuse CI810B with CI869, CI855, CI856, or any other AC 800M communication module. They are not interchangeable. CI810B is specifically an AF 100 interface. I have seen a replacement ordered as “AF 100 card” arrive as a different CI8xx module because nobody checked the full 3BSE number. The module fit the slot, powered up, and did nothing useful.Also check the accessories. The TB807 bus terminal and the power connector are easy to lose during previous outages. If the terminal block does not match the original wiring, you will spend hours re-mapping AF 100 station addresses instead of swapping the card.
Installation & Configuration Guide
- Pre-Installation: Follow site lockout/tagout rules. Photograph the existing CI810B label, CEX-Bus slot position, TB807 terminal wiring, AF 100 cable tags, and LED status. ⚠️
- Removal: Label each AF 100 twisted-pair cable. Remove the TB807 terminal block carefully. Release the module retaining mechanism and withdraw the CI810B from the CEX-Bus slot.
- Installation: Verify the part number 3BSE020520R1 and confirm the TB807 terminal matches the original. Seat the CI810B firmly in the same CEX-Bus slot. Reconnect AF 100 cables exactly as labeled.
- Power-On & Testing: Restore 24 V DC rack power. Check module LEDs. Verify that the AC 800M controller recognizes the CI810B. Test AF 100 dataset communication with the remote Advant/AC 450 node. Do not change station addresses or cable pairs unless the original configuration is documented.
Compatible Replacement Models
| Compatibility | Model / Option | Notes |
|---|---|---|
| ✅ Drop-in Replacement | CI810B 3BSE020520R1 | Same module, same accessories. |
| ⚠️ System-Level Alternative | CI869K01 | Used for Advant Fieldbus 100 dataset communication in some AC 800M applications; not a direct pin-for-pin substitute without configuration review. |
| ⚠️ Related Legacy Interface | CI855K01 | MasterBus 300 interface for AC 450 / MP 200; different protocol, not a replacement for AF 100. |
| ❌ Not Compatible | CI854, CI867, CI871, CI873 | Profibus, Modbus TCP, PROFINET, and EtherNet/IP modules do not replace AF 100. |
Frequently Asked Questions (FAQ)
Is CI810B 3BSE020520R1 the same as CI869?
No. CI810B is an AF 100 twisted-pair modem interface. CI869 is a different Advant Fieldbus 100 communication module. They may serve similar migration purposes, but they are not direct drop-in replacements.Can I use this module for Ethernet communication?
No. CI810B handles AF 100 over twisted pair. It is not an Ethernet, Modbus TCP, or PROFINET card.Does it include the TB807 terminal block?
It should, but verify before shipping. Many used units arrive without the correct terminal block or power connector.What firmware version should I expect?
Many listings show base system software version 1.5. Confirm the actual version on the label or test report before accepting the unit.Is this module still available new?
Some suppliers still list factory-sealed stock, but availability varies. Most units in circulation are new surplus or verified used.Can I hot-swap it?
AC 800M supports online replacement for several CEX-Bus modules, but AF 100 communication loss can affect inter-controller data. Treat it as a planned change unless the site has proven hot-swap procedures.What should I send before ordering?
Send a photo of the existing module label, the TB807 terminal wiring, the CEX-Bus slot number, and the remote device it communicates with. That prevents the wrong “AF 100 card” from arriving.
