ABB DAPI100 3AST000929R109

Description

Product Overview
The ABB DAPI100 3AST000929R109 is a distributed automation panel interface module designed for ABB’s AC 800M and AC 870P control systems. This high-integrity communication interface unit serves as the bridge between process controllers and remote I/O clusters in mission-critical industrial automation environments. The ABB DAPI100 3AST000929R109 enables seamless data exchange across fiber-optic and copper network infrastructures while maintaining deterministic response times required for closed-loop control applications.

Technical Specifications
The ABB DAPI100 3AST000929R109 operates on a 24 VDC power supply with 8 W typical consumption and features dual redundant communication ports supporting PROFIBUS DP and ABB proprietary S100 I/O protocols. The module provides galvanically isolated RS485 interfaces with software-selectable termination and bias resistors. Transmission speeds are configurable up to 12 Mbps with automatic baud rate detection. The ABB DAPI100 3AST000929R109 incorporates 16 MB of onboard buffer memory for process data and supports up to 244 bytes of cyclic data per slave. Housed in a compact IP20 enclosure measuring 120 mm x 75 mm x 65 mm, the unit mounts on standard 35 mm DIN rail and operates from -25°C to +70°C ambient temperature.

Key Features and Advantages

• Redundant Communication: The ABB DAPI100 3AST000929R109 supports media redundancy protocols with <10 ms switchover time, ensuring uninterrupted process control during network path failures.

• Protocol Conversion: Translates between PROFIBUS DP and ABB S100 I/O bus without external gateway hardware or additional programming.

• Integrated Web Server: Built-in diagnostics accessible via standard web browser for remote status monitoring and fault logging.

• Time Synchronization: Supports SNTP and IRIG-B for precise time-stamping of process events across distributed systems.

• Failsafe Operation: Configurable output states upon communication loss prevent dangerous actuator conditions during network interruptions.

Application Areas
The ABB DAPI100 3AST000929R109 is extensively deployed in pulp and paper mill distributed control upgrades, where it interfaces legacy S100 I/O racks with modern AC 800M controllers. A Scandinavian chemical plant recently installed 45 ABB DAPI100 3AST000929R109 units to migrate their batch reactor control from MOD 300 to 800xA without replacing existing field terminations. The module is also widely specified in water treatment facilities requiring PROFIBUS connectivity to variable frequency drives and analytical instruments while maintaining ABB controller compatibility.

Competitive Comparison
Versus the Siemens ET 200SP Interface Module IM 155-6 PN and Rockwell 1734-AENT, the ABB DAPI100 3AST000929R109 uniquely supports both PROFIBUS master and slave operating modes, providing exceptional flexibility for mixed-vendor system architectures. Unlike generic protocol converters, this ABB authentic module preserves full diagnostic visibility of connected I/O devices within the 800xA engineering environment. The ABB DAPI100 3AST000929R109 also offers superior environmental specifications compared to standard commercial-grade Ethernet interfaces, with extended temperature range and conformal coating options for harsh industrial atmospheres.

Selection Guidelines and Precautions

• Verify controller compatibility: The ABB DAPI100 3AST000929R109 requires AC 800M firmware version 5.1 or later for full functionality.

• Confirm that the ABB DAPI100 3AST000929R109 part number includes the correct suffix for your regional variant; export-controlled versions may have restricted communication features.

• Always terminate unused PROFIBUS ports with supplied terminating resistors to maintain signal integrity on active segments.

• The ABB DAPI100 3AST000929R109 must be configured using Control Builder M Professional; standard PROFIBUS configuration tools cannot access ABB-specific parameters.

• Order the ABB DAPI100 3AST000929R109 with corresponding TB807 or TB820 termination bases when integrating with legacy S100 I/O systems.

• Ensure that total bus segment length does not exceed PROFIBUS specifications for the selected baud rate to prevent communication timeouts.

1756-M13 AB
1746-IB16 AB
1746-IB8 AB
1746-NO4I AB
1756-A7 AB