ABB CI801 3BSE022366R1 Retrofit-Ready PROFIBUS DP-V1 Master for AC 800M Control Systems
The ABB CI801 (3BSE022366R1) is a PROFIBUS DP-V1 Master communication module designed for the AC 800M controller platform — one of ABB’s most widely deployed distributed control system (DCS) architectures in process industries. As legacy AC 800M installations age and original CI801 units reach end-of-life, plant engineers and system integrators increasingly require verified retrofit-ready replacements that preserve existing PROFIBUS network topology, field device addressing, and control program logic without requiring a full system redesign.
This listing supplies the CI801 3BSE022366R1 as a direct retrofit replacement, tested for compatibility with the AC 800M controller family, including the PM861, PM864, and PM865 processor modules. The module slots into the standard AC 800M S800 I/O backplane and communicates via the internal ModuleBus, requiring no additional hardware adapters. Each unit ships with a 12-month warranty and undergoes pre-shipment functional verification.
Upgrade Compatibility Table
| Parameter | CI801 3BSE022366R1 | Notes / Retrofit Guidance |
|---|---|---|
| Communication Protocol | PROFIBUS DP-V1 (Master Class 1 & 2) | Compatible with all DP-V0 and DP-V1 slave devices on existing network |
| Controller Platform | ABB AC 800M (PM861 / PM864 / PM865) | Verify processor firmware version ≥ 5.1 for full DP-V1 acyclic services |
| Backplane Interface | ModuleBus (internal AC 800M bus) | Installs in any free module slot on the AC 800M rack; no external cabling required |
| PROFIBUS Baud Rate | 9.6 kbps – 12 Mbps (auto-detect) | Match to existing network baud rate; no reconfiguration of slave devices needed |
| Max Slave Devices | Up to 125 DP slaves per segment | Verify GSD files for all connected slaves are loaded in Control Builder M |
| Power Supply | Powered via AC 800M backplane (5 VDC / 24 VDC) | No separate PSU required; confirm rack power budget with SD821 or SD822 power supply |
| Terminal / Connector | DB9 female (PROFIBUS standard) | Existing PROFIBUS cable connectors are directly reusable; check termination resistors at segment ends |
| Replacement for | CI801, CI830, CI840 (with configuration adjustment) | CI830 (PROFIBUS DP-V0 only) users must update GSD references in Control Builder M |
| Programming Tool | ABB Control Builder M (CBM) | Import existing .xpj project; re-download application after hardware replacement |
| Commissioning | Online download supported | Warm restart possible if processor remains powered; cold restart required for new module address assignment |
| Warranty | 12 Months | Covers manufacturing defects; includes pre-shipment functional test report on request |
Retrofit Planning for Existing Automation Systems
Replacing a CI801 3BSE022366R1 in an operating plant requires careful pre-work to avoid unplanned downtime and protect the integrity of the existing control program. Before removing the failed or end-of-life module, engineers should document the current PROFIBUS network configuration using Control Builder M, noting each slave station address, GSD file version, and cyclic I/O byte mapping. This configuration data is stored in the AC 800M project file and will be re-downloaded to the new CI801 after installation.
The AC 800M rack typically houses the CI801 alongside other communication and I/O modules. In a standard control cabinet, the rack may also contain an CI854 (IEC 61850 / LON communication module), a CI857 (Ethernet fieldbus module), or an CI858 (DNP3 communication module) serving parallel communication channels. These modules are unaffected by the CI801 replacement and remain online during the swap if the processor is not restarted. The SD821 or SD822 power supply module feeding the rack should be checked to confirm available current headroom before inserting the replacement CI801, as adding a new module changes the rack’s total power draw.
On the field side, the PROFIBUS DP segment connected to the CI801 typically includes remote I/O stations such as the S800 I/O modules (AI810, AO810, DI810, DO810) mounted on TB820 ModuleBus terminators, as well as third-party DP slaves such as variable frequency drives, valve positioners, and smart transmitters. None of these field devices require reconfiguration when the CI801 is replaced with an identical 3BSE022366R1 unit, provided the new module is assigned the same PROFIBUS master address in Control Builder M.
For plants migrating from an older CI830 PROFIBUS DP-V0 master to the CI801 DP-V1 master, the upgrade path involves updating the GSD file references for each slave in the Control Builder M project to enable acyclic DP-V1 parameter access. This unlocks advanced diagnostics and online parameter changes for intelligent field devices without interrupting cyclic process data exchange. The CI801 also supports Class 2 master functions, allowing a laptop running a PROFIBUS commissioning tool to connect simultaneously to the network for live diagnostics without interfering with the CI801’s Class 1 cyclic communication.
HMI screens connected to the AC 800M via OPC DA or OPC UA (through the AC 800M OPC Server) do not require updates after the CI801 replacement, as the process variable tags remain unchanged in the controller database. However, if the plant uses an ABB 800xA System (System 800xA), the Aspect Object for the CI801 hardware unit should be updated in the 800xA Engineering Workplace to reflect the new module serial number for asset management records.
Downtime Control During System Migration
Minimizing production interruption during a CI801 replacement is achievable with proper preparation. The recommended approach is a hot-swap procedure where the AC 800M processor (PM861, PM864, or PM865) remains powered and in RUN mode while the CI801 is physically replaced. During the brief period between module removal and insertion, the PROFIBUS slaves will detect a loss of the master token and enter a safe state — typically holding last output values or switching to a fail-safe output defined in each slave’s local configuration. The duration of this interruption is typically under 30 seconds for an experienced technician performing a pre-planned swap.
To protect the original control program logic, the full AC 800M project should be backed up from Control Builder M before any hardware work begins. The backup includes the application program, hardware configuration, PROFIBUS GSD assignments, and all function block parameters. After the new CI801 is seated and the rack bus connection is established, Control Builder M will detect the new module and prompt for a hardware configuration download. A warm download (online change) is preferred to avoid interrupting the processor’s execution of other application tasks running on parallel communication modules.
For critical processes where even a 30-second interruption is unacceptable, a parallel migration strategy is recommended: install a second AC 800M rack with a new CI801 and shadow the PROFIBUS network in listen-only mode before cutting over. This approach requires a PROFIBUS repeater or optical link module (OLM) to bridge the two segments temporarily. Once the new CI801 is verified to receive correct process data, the cutover can be executed during a planned maintenance window with the field devices already confirmed operational on the new master.
Retrofit Support FAQ
Q1: Is the CI801 3BSE022366R1 a direct drop-in replacement for a failed CI801 unit?
Yes. The CI801 3BSE022366R1 is the standard ABB part number for this module. A replacement unit with the same part number installs in the same rack slot, uses the same DB9 PROFIBUS connector, and accepts the same Control Builder M hardware configuration download without any wiring or software changes. The only required step is re-downloading the hardware configuration from Control Builder M after insertion.
Q2: Can the CI801 replace a CI830 or CI840 module in an existing AC 800M system?
The CI801 can replace a CI830 (PROFIBUS DP-V0 master) with a Control Builder M project update to reassign the communication module type and reload GSD files. Replacing a CI840 (PROFIBUS DP-V1 slave) requires a different migration path, as the CI840 operates as a slave rather than a master. Contact our technical team to confirm the correct replacement strategy for your specific hardware configuration.
Q3: What commissioning steps are required after installing the replacement CI801?
After physical installation, open the existing AC 800M project in Control Builder M, navigate to the hardware configuration, confirm the CI801 is detected in the correct slot, and perform a hardware configuration download. Verify that all PROFIBUS slave stations appear online in the PROFIBUS diagnostic view. Check cyclic I/O data for each slave station and confirm process values match field readings. For DP-V1 slaves, test acyclic parameter read/write access using the Control Builder M online tools. Total commissioning time for an experienced engineer is typically 1–2 hours.
Q4: What does the 12-month warranty cover, and is a pre-shipment test report available?
The 12-month warranty covers all manufacturing defects and functional failures under normal operating conditions. Each CI801 3BSE022366R1 unit undergoes pre-shipment functional testing including PROFIBUS communication verification, backplane interface check, and firmware version confirmation. A test report is available on request at the time of order. Warranty claims are processed with a replacement unit dispatched within 5 business days of fault confirmation.
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