ABB 3BDH000395R0001 Retrofit-Ready PROFIBUS DP Module

ABB 3BDH000395R0001 Retrofit-Ready PROFIBUS DP Module for AC 800M Control Systems

The ABB 3BDH000395R0001 is a PROFIBUS DP master communication module engineered for the ABB AC 800M controller platform. Designed as a direct retrofit replacement for the discontinued CI854AK01, this module enables industrial facilities to modernize aging DCS and PLC architectures without redesigning the control cabinet or rewriting core program logic. Whether you are managing a phased upgrade of an S800 I/O network, migrating from legacy fieldbus topologies, or restoring a critical production line after an unplanned failure, the 3BDH000395R0001 delivers verified electrical and protocol compatibility with minimal commissioning overhead.

This module slots directly into the AC 800M controller rack, occupying the same backplane position as the CI854AK01 it replaces. Terminal wiring assignments, PROFIBUS DP segment addressing, and GSD file references remain consistent, which means your existing field device configurations — including Siemens ET 200S remote I/O stations, ABB S800 I/O modules, and third-party PROFIBUS slaves — can be retained without modification. The module supports PROFIBUS DP-V0 and DP-V1 services, preserving cyclic data exchange and acyclic parameter access that many legacy HMI screens and SCADA systems depend on.

Before installation, engineers should verify the power budget of the PM861AK01 or PM864AK01 processor module currently installed in the rack. The 3BDH000395R0001 draws its supply from the backplane, and adding or swapping communication modules can affect the total current draw on the AC 800M power supply unit. If the existing PM8xx processor is operating near its rated load, consider auditing the rack configuration before proceeding. In multi-rack installations connected via CEX-Bus or optical ModuleBus, the module address assignment must be confirmed in the Control Builder M engineering tool to avoid address conflicts with other CI854 or CI855 modules on the same controller node.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful retrofit begins with a thorough audit of the existing control architecture. In most AC 800M installations, the PROFIBUS DP network managed by the CI854AK01 connects to a mix of S800 I/O modules — such as AI810, AO810, DI810, and DO810 — mounted on TB820V2 ModuleBus Modem termination units. These field I/O modules communicate over the optical ModuleBus and do not require reconfiguration when the master communication module is swapped, provided the module address in Control Builder M is preserved.

For control cabinets that also house a CI855 Ethernet communication module or a CI857 IEC 61850 module alongside the CI854AK01, the rack slot layout must be documented before removal. The 3BDH000395R0001 must be inserted into the same slot to maintain the hardware configuration file integrity. If the slot position changes, the Control Builder M project file must be updated and a full download to the PM8xx processor will be required, which constitutes a planned restart of the controller.

In systems where the PROFIBUS DP segment also carries communication to a third-party HMI — such as a panel running ABB CP600 or a SCADA server using OPC DA — the DP slave address table and GSD file assignments should be exported and archived before the swap. After installing the 3BDH000395R0001, re-import the GSD files and verify that all slave addresses are correctly mapped. The SA811 signal conditioner units and any TP830 PROFIBUS termination panels in the segment should be inspected for correct bus termination, as impedance mismatches can cause intermittent communication faults that are difficult to diagnose after the module swap.

Power supply integrity is another critical checkpoint. The SB821 or SB822 power supply modules feeding the AC 800M rack should be load-tested before the retrofit to confirm they can sustain the full rack current draw. If the installation includes a redundant controller configuration using two PM864AK01 processors and multiple communication modules, the power budget calculation must account for both active and standby module loads.

Downtime Control During System Migration

Minimizing unplanned downtime is the primary concern in any live production environment. For the 3BDH000395R0001 retrofit, the recommended approach is to perform a controlled shutdown during a scheduled maintenance window rather than a hot-swap, as the AC 800M platform requires the controller to be in STOP mode before removing or inserting communication modules in most rack configurations.

Before initiating the shutdown, export the full Control Builder M project, including the hardware configuration, application program, and all function block library references. Store this backup on an offline engineering workstation and verify the backup integrity by opening the project file. This ensures that if the commissioning process encounters an unexpected issue, the original program logic can be restored without data loss.

During the module swap, label all PROFIBUS DP cable connections at the DB9 connector before disconnection. After installing the 3BDH000395R0001, reconnect the cables in the same order and verify bus termination at both ends of the PROFIBUS segment. Power up the rack and allow the PM8xx processor to complete its self-test sequence before initiating a download from Control Builder M. Monitor the PROFIBUS diagnostic LEDs on the new module during the first scan cycle to confirm that all slave devices — including remote S800 I/O stations and any third-party DP slaves — are communicating correctly.

Once the PROFIBUS network is confirmed healthy, switch the controller to RUN mode and verify HMI screen data refresh, alarm status, and analog signal values against pre-shutdown reference readings. This validation step typically takes 15 to 30 minutes for a standard AC 800M node and is the final checkpoint before returning the system to full production operation. All units supplied by SMARTNEXMSK are pre-tested prior to shipment and covered by a 12-month warranty, reducing the risk of module-related failures during the commissioning phase.

Retrofit Support FAQ

Q: Is the 3BDH000395R0001 a direct drop-in replacement for the CI854AK01?
A: Yes. The 3BDH000395R0001 is the current ABB part number for the CI854AK01 PROFIBUS DP master module for the AC 800M platform. It occupies the same rack slot, uses the same DB9 PROFIBUS connector, and is configured using the same Control Builder M hardware library. No wiring changes are required in the majority of retrofit scenarios.

Q: Do I need to update my Control Builder M project after the swap?
A: In most cases, if the module is installed in the same rack slot and the hardware configuration file already references the CI854AK01 or its equivalent, no project update is required. However, if the slot position changes or the firmware version of the new module differs significantly, a hardware configuration update and full download may be necessary. Always compare the module firmware version in the Control Builder M hardware catalog before proceeding.

Q: What pre-shipment testing is performed on this module?
A: Every 3BDH000395R0001 unit supplied by SMARTNEXMSK undergoes functional verification prior to dispatch, including power-on self-test, PROFIBUS DP communication initialization, and backplane interface check. Units are shipped with original packaging and documentation where available. A 12-month warranty is provided from the date of shipment, covering manufacturing defects and functional failures under normal operating conditions.

Q: Can this module be used in a redundant AC 800M controller configuration?
A: The 3BDH000395R0001 supports standard AC 800M rack configurations. For redundant controller setups using paired PM864AK01 processors, consult the ABB AC 800M Hardware Configuration and Installation manual to confirm the supported communication module combinations for your specific redundancy architecture. Contact our technical team at [email protected] for application-specific guidance.

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