Description
The ABB DSAI146 3BSE007949R1 is a high-precision analog input module designed for ABB’s AC 800M distributed control system (DCS), serving as a critical interface for acquiring continuous process signals in industrial automation. As part of the S800 I/O Series, the DSAI146 3BSE007949R1 is engineered to convert analog signals from sensors (e.g., temperature, pressure, flow) into digital data for real-time control and monitoring. With 8 isolated channels supporting multiple signal types (4–20 mA, 0–10 V, thermocouples, RTDs), this module is ideal for harsh environments in oil & gas, chemical processing, and power generation, where reliable and accurate signal acquisition is non-negotiable.
Featuring galvanic isolation (500 V rms) and advanced noise filtering, the DSAI146 3BSE007949R1 ensures signal integrity in high-EMI environments, such as near large motors or high-voltage equipment. Its hot-swappable design allows maintenance without system shutdown, while front-panel LED indicators provide instant feedback on channel status and power health. The module integrates seamlessly with ABB’s 800xA software platform, enabling engineers to configure signal scaling, alarm thresholds, and diagnostic parameters via a unified interface. Positioned as a robust and flexible solution, the DSAI146 3BSE007949R1 enhances process accuracy, reduces downtime, and supports predictive maintenance through real-time data analytics.
| Parameter Name |
Parameter Value |
| Product Model |
DSAI146 3BSE007949R1 |
| Manufacturer |
ABB |
| Product Type |
Analog Input Module (DCS I/O) |
| Channels |
8 isolated channels (universal input) |
| Signal Types |
4–20 mA, 0–20 mA, 0–5 V, 0–10 V, TC (J/K/T/E), RTD (Pt100/200/500/1000) |
| Isolation |
500 V rms (channel-to-earth) |
| Resolution |
16-bit (analog), 0.1% accuracy |
| Update Rate |
<200 ms (per channel) |
| Power Supply |
24 V DC (via backplane, 80 mA typical) |
| Operating Temperature |
-25°C to +60°C |
| Dimensions (W×H×D) |
36 mm × 100 mm × 110 mm |
| Mounting Method |
DIN rail (AC 800M S800 I/O rack) |
| Certification |
CE, UL, IEC 61131-2, RoHS |
| Diagnostic Features |
Channel fault detection, sensor 断线 (open circuit) monitoring |
The DSAI146 3BSE007949R1 eliminates the need for multiple specialized modules by supporting a wide range of analog signals. For example, in a chemical plant, it can simultaneously acquire 4–20 mA signals from flow meters, 0–10 V signals from pH transmitters, and RTD signals from reactor temperature sensors, all within a single unit. This versatility reduces hardware costs and simplifies inventory management, as a single module can address diverse process monitoring needs.
Galvanic isolation and built-in EMC filtering protect against interference from motors, inverters, and other industrial equipment, ensuring accurate readings in noisy environments like steel mills. The module’s self-diagnostic functions continuously monitor for sensor faults (e.g., open circuits, out-of-range signals), with real-time alerts via the 800xA system. In a power plant, this feature can detect a failing thermocouple in a steam turbine before it causes an inaccurate control response, preventing potential safety incidents or equipment damage.
The module’s hot-swappable capability allows technicians to replace faulty units without powering down the system, critical for 24/7 operations like pharmaceutical production or water treatment plants. Its compact 36 mm width optimizes space in control panels, while the S800 I/O backplane enables seamless integration with other modules (e.g., digital inputs, communication interfaces) for scalable DCS configurations. Engineers can quickly reconfigure channels via ABB’s Control Builder M software, adapting to process changes without hardware modifications.
The ABB DSAI146 3BSE007949R1 is essential in industries requiring precise analog signal monitoring:
- Oil and Gas: Measures pressure, temperature, and level in upstream wellheads, midstream pipelines, and downstream refineries. In an offshore platform, the module’s rugged design withstands salt spray and vibration while acquiring analog signals from subsea flow meters and valve positioners.
- Chemical and Petrochemical: Monitors critical process variables in reactors, distillation columns, and blending systems. For instance, it can track 4–20 mA signals from gas chromatographs to ensure product quality in a polymer production line.
- Power Generation: Supports analog monitoring in thermal, hydro, and renewable energy plants. In a wind farm, the module measures RTD signals from gearbox temperature sensors and 0–10 V signals from pitch angle encoders, enabling real-time health assessment of turbines.
- Water and Wastewater: Monitors pH, conductivity, and 液位 (liquid level) in treatment plants. Its noise immunity ensures reliable readings in pump stations, even amid high-energy motor operations.
- ABB DSAO141 3BSE008001R1: A 4-channel analog output module, complementary to the DSAI146 for closed-loop control applications.
- ABB DSAI130 3BSE004867R1: A lower-cost variant with 8 channels (4–20 mA only), suitable for basic analog monitoring.
- ABB PM866AK01: An AC 800M control module, processing data from the DSAI146 and executing control logic.
- ABB TB521: A terminal block for secure field wiring, compatible with the DSAI146’s analog inputs, ensuring reliable connections in high-vibration environments.
- ABB CI522 3BSE008615R1: A Profibus DP interface module, enhancing the DSAI146’s connectivity in hybrid fieldbus networks.
Pre-installation preparation: Mount the DSAI146 3BSE007949R1 in an AC 800M S800 I/O rack, ensuring proper grounding and ventilation. Use shielded twisted-pair cables for field connections, terminating sensor signals to the TB521 terminal block with specified torque (2.5 N·m). Configure signal types, scaling, and alarm limits via Control Builder M, verifying compatibility with sensors (e.g., calibrating RTD channels for Pt100 sensors).
Maintenance recommendations: Inspect the module’s LED indicators monthly to confirm channel status and power supply health. In dusty environments (e.g., cement plants), clean ventilation slots quarterly with compressed air. Test hot-swappable functionality annually to ensure rapid module replacement capability. Update firmware via the AC 800M’s firmware manager to incorporate bug fixes or new sensor compatibility. For thermocouple channels, check wire connections annually for oxidation or loose terminations, which can cause measurement errors.
ABB stands behind the DSAI146 3BSE007949R1 with a 3-year warranty, covering defects in materials and workmanship. ABB’s global technical support team provides 24/7 assistance for configuration, troubleshooting, and remote diagnostics, ensuring minimal disruption to operations. The module’s compliance with international standards (IEC, UL) and rigorous testing (e.g., 10,000-cycle signal integrity tests) guarantees long-term reliability. With its combination of precision, durability, and ease of use, the DSAI146 3BSE007949R1 remains a trusted choice for analog input solutions in thousands of industrial applications worldwide.
Shanxi Xinyeda International Trading Co., Ltd. is your trusted partner, we provide and other automation spare parts sales and technical support. Please visit our website www.xydcontrol.com or contact us and we will be happy to serve you.
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