The temperature acquisition DCS board can use a 24 bit analog-to-digital converter GX7173 and RS485 transceiver GX3490 to replace AD7173 and MAX3490

DCS board is an important component used for monitoring and controlling industrial processes, which can convert analog signals into digital signals for digital processing and control. In DCS boards, the function of ADC is to convert temperature analog signals generated in industrial systems into digital signals for processing and control by the DCS system. Enable the DCS system to precisely control and regulate these signals. Main design factors:

The key parameters of analog-to-digital converters include resolution, sampling rate, accuracy, and stability.

Compatibility between analog-to-digital converters and DCS systems, as well as their adaptability in different industrial environments.

This type of board must meet strict requirements: temperature measurement accuracy must reach ± 0.1 ℃, support multi-channel synchronous acquisition, and be able to communicate stably in strong electromagnetic interference environments. The combination of domestic analog-to-digital converter GX7173 and RS485 transceiver GX3490 is an ideal solution for high-precision, strong anti-interference, and high reliability temperature acquisition DCS board. 

GX7173: High precision multi-channel analog-to-digital converter

GX7173 is a fast setup, highly accurate, low-power, 8/16 channel, multiplexed ADC suitable for low bandwidth input signals, with integrated input buffer. This device integrates a precision 2.5V low drift (3.5ppm/° C) bandgap reference voltage source and oscillator. This device provides 8 flexible settings, which can be configured for output data rate, digital filter mode, offset/gain error correction reference voltage selection, buffer enable, PGA, etc. The Sinc5+sinc1 filter can greatly improve the channel scanning rate, while the sinc3 filter can greatly improve the resolution and enhance the 50Hz/60Hz suppression performance. In addition, there are four options to choose from, which can significantly reduce noise.

GX3490: Industrial grade RS485 transceiver

In the application scenario of temperature acquisition DCS board, the distance between devices is relatively long, and the RS485 standard itself supports long-distance transmission. The high-speed and low-power RS485 transceiver GX3490 has good electrical performance and can achieve stable data transmission at a distance of kilometers, ensuring reliable communication between devices located in different workshops and areas. GX3490 supports a maximum data rate of 10Mbps and can quickly transmit a large amount of data generated by industrial field equipment, such as real-time data collected by sensors and equipment operation status data, to the monitoring system or control center in a timely manner, meeting the real-time requirements of industrial control and enabling the control center to make decisions and adjustments quickly.