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LON总线是美国ECHELON公司于1991年推出的产品,选用MOTOROLA公司生产的NEUROU专用芯片,使用LONWORKS技术向用户提供开发工具和OEM产品,据称已销售700万个芯片,在断续控制领域里,如楼宇管理、电力、化工系统得到了较好的应用。 HART协议是美国ROSEMONT公司推出的现场总线产品,使用了键控频移技术,在直流4～20mA信号上,叠加工频调制信号,经过调频和解调处理,使“瓶颈”问题得以克服,实现了数字传输。但是,HART
LON bus is the United States ECHELON company launched in 1991, using MOTOROLA company NEUROU ASIC, the use of LONWORKS technology to provide users with development tools and OEM products, is said to have sold 7 million chips in the field of intermittent control, Such as building management, power, chemical systems have been better applications. The HART protocol is a fieldbus product introduced by ROSEMONT Company in the United States. It uses keyed frequency shift technology to superimpose a frequency-modulated signal on a 4-20mA DC signal to overcome the bottleneck problem after FM and demodulation. Digital transmission. However, HART