ABB DSAI130DK01 3BSE020828R1 Isolated Temperature Input Module
The ABB DSAI130DK01 with order code 3BSE020828R1 is a single-channel, isolated RTD temperature input module from the ABB S800 I/O series, designed for integration into Freelance and AC 800M Distributed Control Systems. This module is specifically engineered to interface with Resistance Temperature Detectors, providing high-precision, direct temperature measurement for a single, critical point. The DK suffix indicates configuration for RTD input, while the 01 suffix specifies the particular variant including RTD type and wiring configuration.
Technical Specifications
The DSAI130DK01 is a single-channel isolated input module, with channel-to-system isolation crucial for rejecting electrical noise and preventing ground loops that could impact low-resistance RTD measurements. The input type is RTD, with the DK01 suffix typically specifying Pt100 sensor type with 100 ohms at 0 degrees Celsius, but may also support Pt1000, Ni100, or other sensor types. The wiring configuration is typically 3-wire connection for standard industrial Pt100 applications, which allows for lead resistance compensation. The module also supports 2-wire or 4-wire connections depending on configuration requirements.
Measurement Principles
The DSAI130DK01 employs a constant current source excitation and precision voltage measurement to calculate resistance and temperature. The measurement range is defined by the RTD type, with Pt100 supporting a range of -200 degrees Celsius to +850 degrees Celsius, configurable in software. The module achieves high accuracy, typically within ±0.1 degrees Celsius or better at reference conditions, depending on RTD type and wiring configuration. The excitation current is a low constant current of approximately 0.5 mA or 1 mA to minimize self-heating of the RTD sensor, ensuring measurement accuracy over the full temperature range.
Design and Isolation
The DSAI130DK01 exemplifies the S800 series' focus on high-accuracy, single-channel measurement for critical loops. The module features channel-to-system isolation, which is essential for rejecting electrical noise that could impact the low-resistance measurement of RTDs. The DSAI130DK01 is mounted on a dedicated S800 terminal base unit specifically designed to support the 2-wire, 3-wire, or 4-wire connection required for RTDs, with features for lead resistance compensation particularly important for 3-wire connections. This design makes the module the preferred choice for applications where temperature is a key process or safety variable requiring the highest measurement integrity.
System Integration
The DSAI130DK01 integrates into the ABB S800 I/O system architecture, communicating with the system controller via the S800 backplane. The module converts the small resistance change of the RTD sensor into a high-resolution digital temperature value for the control system. The single-channel design ensures that each temperature measurement point has dedicated signal conditioning and isolation, preventing cross-channel interference and providing maximum measurement integrity for critical temperature loops. The module is compatible with Freelance and AC 800M DCS families, providing a standardized solution for high-precision temperature measurement.
Applications
The ABB DSAI130DK01 3BSE020828R1 is deployed in process control applications requiring high-precision temperature measurement for critical loops. Typical applications include chemical reactors where temperature is a key process variable for reaction control, furnaces and ovens requiring precise temperature regulation for product quality, and heat exchangers where temperature measurement is essential for thermal efficiency. The module is also used in power generation for turbine inlet temperature monitoring, pharmaceutical manufacturing for bioreactor temperature control, and food processing for pasteurization and sterilization applications where measurement integrity is paramount.
