About this Video

• Video Title: PTA9B01: cheap Modbus temperature sensor, when you need one more temperature of cover long distance
• Channel: Csongor Varga
• Speakers: Csongor Varga
• Duration: 00:07:42

Introduction

This video reviews a low-cost Modbus temperature sensor, the PTA9B01. The speaker highlights its usefulness in industrial automation applications where an additional temperature measurement is needed, especially over long distances, without the expense of additional analog input cards.

Key Takeaways

• Affordable Temperature Measurement: The PTA9B01 offers a cost-effective solution for measuring temperature, particularly when compared to the expense of expanding existing PLC analog input capabilities.
• Long-Distance Applicability: Suitable for measuring temperatures at locations distant from the main control system due to its Modbus communication. While using a PT100 sensor, the short cable length between the sensor module and the device being measured minimizes the impact of cable length on accuracy.
• Easy Setup and Use: The device is straightforward to connect and configure, using standard Modbus functions (3 and 6) to read and write values. The default address is easily changed.
• Temperature and Resistance Compensation: The device allows for temperature and PT100 resistance compensation, using a unique method where the desired corrected value is sent, rather than a correction offset.
• Wide Availability: The sensor is readily available from various online and local vendors.