为了大力推进现场总线技术在带有爆炸危险的过程自动化领域的应用,图尔克公司推出了一种新型的总线部件——总线式隔离安全栅(excom~)。下面从其产生的背景、系统结构、特点及其应用的优势几个方面作一介绍。 1 产生背景目前,在我国大部分企业生产过程底层的测控自动化系统中,仍采用一对一连线,生产现场各处的参数通过统一的模拟信号,如0.02-0.1MPa的气压信号,0-10mA、4-20mA的直流电流信号,1- In order to promote the application of fieldbus technology in the field of explosion-hazardous process automation, Turck has introduced a new type of bus component, the bus isolation barrier (excom). The following from the background, system structure, characteristics and advantages of its application in several aspects to make an introduction. 1 Background At present, most of the bottom of the production control system in our country, still using one-to-one connection, the parameters throughout the production site through a unified analog signal, such as 0.02-0.1MPa pressure signal, 0- 10mA, 4-20mA DC current signal, 1-