ABB DSMB-01C (64691929) Module – Genuine MasterBus 300 Communication Interface for Advant Controller

Description

The ABB DSMB-01C (manufacturer part number 64691929) is a dedicated serial communication interface module designed for ABB’s legacy Advant Controller and AC 800M distributed control systems. As part of the MasterBus 300 I/O family, the ABB DSMB-01C enables reliable point-to-point or multi-drop data exchange between the central controller and external devices such as operator terminals, printers, barcode scanners, legacy PLCs, or third-party instruments using standard RS-232 or RS-485 protocols. This module plays a pivotal role in hybrid automation environments where modern DCS platforms must coexist with older field equipment.

Positioned as a versatile gateway, the ABB DSMB-01C supports configurable baud rates, parity settings, and data formats, allowing seamless integration with both proprietary ABB protocols and open standards like Modbus RTU. It mounts directly into the MasterBus 300 backplane alongside other I/O modules, drawing power and communicating with the CPU via the deterministic system bus. Despite its age, the ABB DSMB-01C remains widely deployed in power plants, pulp & paper mills, and chemical facilities due to its rugged construction, long-term firmware stability, and ABB’s continued support for legacy Advant infrastructure. Its ability to maintain connectivity without requiring full system migration makes it an invaluable asset for lifecycle extension projects.

DSMB-01C 64691929 ABB

Technical Specifications

Main Features and Advantages

Dual-Interface Flexibility for Mixed Environments:
The ABB DSMB-01C provides both RS-232 and RS-485 ports on a single module, eliminating the need for external converters. This allows direct connection to local operator panels (via RS-232) while simultaneously supporting multi-drop field networks (via RS-485)—ideal for integrating barcode readers in warehouses or remote metering units in water treatment plants.

Native Support for MasterBus 300 and Open Protocols:
While optimized for ABB’s internal MasterBus 300 messaging, the ABB DSMB-01C can be configured as a Modbus RTU master or slave, enabling interoperability with non-ABB devices such as flow meters, analyzers, or legacy PLCs. This dual-mode capability reduces integration costs in brownfield upgrades.

Robust Design for Industrial Reliability:
Built with industrial-grade components and conformal coating, the ABB DSMB-01C withstands electrical noise, humidity, and temperature fluctuations common in plant environments. Its opto-isolated communication lines prevent ground loops and protect the controller from surges on field wiring.

Seamless Integration with Advant Ecosystem:
The ABB DSMB-01C requires no external power supply or configuration jumpers—parameters are set via ABB’s Composer or CB Tools software. Once installed in a MasterBus 300 rack, it appears as a standard I/O module in the control logic, simplifying programming and diagnostics.

Long-Term Availability and Support:
Despite being part of a legacy platform, the ABB DSMB-01C benefits from ABB’s industrial lifecycle policy, ensuring availability of genuine replacements and technical documentation for decades—critical for asset owners managing 20–30 year plant lifespans.

Application Field

The ABB DSMB-01C is commonly found in thermal power stations, where it connects the Advant Controller to auxiliary systems such as fuel handling PLCs, ash removal monitors, and local operator kiosks via RS-232. In these settings, the module’s reliability ensures uninterrupted data flow even during grid disturbances or electromagnetic transients from switchgear operations.

In pulp and paper mills, the ABB DSMB-01C interfaces with moisture sensors, reel diameter encoders, and quality lab instruments over RS-485 Modbus RTU, feeding real-time data into the main DCS for closed-loop basis weight control. Its multi-drop capability reduces cabling complexity across wide machine halls.

Water and wastewater facilities use the ABB DSMB-01C to communicate with remote pump station RTUs, chlorine dosing controllers, and SCADA gateways—often leveraging its RS-485 port for long-distance runs up to 1200 meters. Similarly, in mining conveyor systems, it links the central controller to belt scale integrators and metal detectors.

Across all these applications, the ABB DSMB-01C serves as a cost-effective, low-risk solution for maintaining connectivity in aging but functional ABB control systems, delaying the need for full platform replacement while preserving decades of operational knowledge embedded in existing logic.

DSMB-01C 64691929 ABB

Related Products

• CI801: MasterBus 300 communication interface for AC 800M—hosts modules likeDSMB-01C
• DSAI-130: Analog input module in the same MasterBus 300 family
• DSAO-120: Analog output module, often used alongsideDSMB-01C in hybrid I/O racks
• DSMC-02: Higher-performance serial module with dual RS-485 ports (successor in some applications)
• TB801: Terminal base forDSMB-01C with screw-type field connections
• ABB AC 800M CPU (e.g., PM864): Central controller that coordinates withDSMB-01C via CI801
• MasterView 330: Operator station historically connected viaDSMB-01C’s RS-232 port