In the field of sensing measurement, the traditional signal output method is current output or voltage output. Nowadays, with the use of computer and internet technology in the industrial field, more and more working conditions choose to use RS485 digital signal output method, which is applied in the field of automation control. Star instrument sensors keep up with the industry and continuously upgrade and transform their products. The star instrument temperature transmitter CWDZ33 has added RS485 digital signal output function, providing customers with more comprehensive sensing and measurement solutions. The star instrument temperature transmitter CWDZ33 uses PT100 as the signal measurement element and undergoes computer automatic testing. It uses laser resistance adjustment technology to compensate for zero and sensitivity temperature in a wide temperature range. The star instrument temperature transmitter CWDZ33 has excellent performance. It has anti-interference, overload, small temperature drift, high stability, and high measurement accuracy. In terms of wiring, the RS485 wiring method of the Star Instrument temperature transmitter CWDZ33 is a four wire system (as shown in the figure below), while the traditional current output wiring is a two wire system. Field personnel need to pay attention to distinguishing when wiring.

Star sensor temperature transmitter CWDZ33 uses RS485 output communication example: Set the communication device address of the sensor at 0-100 ℃ to 01, that is, [Address]=01 (Address range 01-254); At this point, CRC0=84 and CRC1=0a. So the sending and returning data are as follows: Sent to: 01 03 00 00 00 01 84 0A Return: 01 03 02 02 AC B9 59 02AC is hexadecimal, converted to decimal to 684; Therefore, the current temperature value is T=684/10-50=18.4 ℃ Note: When the lower limit of the range is ≥ -50 ℃, the formula is: current data/10-50=current temperature. When the lower limit of the range is<-50 ℃, the formula is: current data/10-200=current temperature. Star instrument temperature transmitter CWDZ33 uses RS485 output query example: Sending FF 03 00 0F 00 01 A1 D7 Return to FF 03 02 00 01 50 50 Then: the device address is 01 (hexadecimal) It should be noted that reading the current device address can only be done independently by a single sensor offline. The above is the technical knowledge related to the RS485 output of the Star Instrument temperature transmitter CWDZ33. If you have any questions, you can directly contact the Star Instrument technical personnel, and we can answer your questions and doubts based on your specific working conditions. If you have any questions regarding product consultation, product customization, agency, technical inquiries, quotations, etc., please contact Xingyi at 400-600-4496!