For instrument signal transmission, should a wired connection be used or a bus connection?
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For the transmission of instrument signals, wired connections and bus connections can be used. (Of course, there are also wireless signals, but they are used less frequently at present.) Ordinary field instruments use wired connections, while for motors, compressors, or other process units, buses are commonly used for data transmission. But it has not been very clear until now; I would like to ask everyone, what is the difference between them? Additionally, what are their respective advantages and disadvantages? What are the criteria for selection? Can it be said that hardwired connections offer better security and transmission speeds compared to buses? Thank you all first!
This post was last edited by zxb1990 on 2015-6-25 07:27. Automated instruments include conventional instruments (pneumatic instruments, electric Type II instruments, electric Type III instruments, smart instruments, etc.) and bus-type instruments. Conventional instruments are connected directly point-to-point using cables, while bus-type instruments are also connected directly using cables or optical fibers; however, one bus can transmit signals from multiple points.