This Modbus RTU slave chip provides a reliable solution for converting 4-20mA analog signals into digital data. It maps the current input to a 0-100% range in a standard Modbus register.
Native Modbus RTU support for easy PLC communication.
High-precision conversion from 4mA (0%) to 20mA (100%).
Reduced footprint for compact industrial PCB designs.
Efficient data scaling performed internally by the chip hardware.
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This high-performance integrated circuit simplifies the integration of analog sensors into digital networks. It functions as a Modbus RTU slave, allowing any industrial PLC or controller to read analog values with high resolution. The chip converts the standard 4-20mA current loop into a digital value ranging from 0% to 100% within a specific Modbus register.
Precision is critical in industrial environments. Consequently, this chip features advanced signal processing to ensure that your 4-20mA signal remains accurate during the conversion process. The internal logic handles the complex scaling automatically. Therefore, the system identifies 4mA as the 0% baseline and 20mA as the 100% full-scale value without requiring external calibration software.
Integration is straightforward because the chip supports the standard Modbus RTU protocol. Designers can pair this component with our RS485 transceiver modules to create a complete industrial interface. By using this chip, you reduce development time and ensure compatibility with existing SCADA systems. The robust architecture makes it an ideal choice for monitoring pressure, temperature, or flow sensors in demanding applications.
How does the chip represent the 4-20mA input? The chip maps the current loop input to a digital Modbus register. A 4mA input corresponds to 0%, while a 20mA input corresponds to 100%. This linear scaling allows for immediate data interpretation by your controller.
What protocol does this integrated circuit use? This component acts as a Modbus RTU slave. It communicates via a serial interface, making it compatible with most industrial automation hardware and software.
Does this 4-20mA to Modbus chip require external calibration? No, the chip comes factory-calibrated to recognize the standard 4-20mA range. It automatically handles the conversion to a percentage-based register, which simplifies your firmware development.
Can I use this chip with long cable runs? Yes, since the 4-20mA current loop is highly resistant to electrical noise, you can place the sensors far from the chip. The chip then converts the signal locally for digital transmission.
Download a Modbus RTU Master Software: qModMaster
