LDU 是横河厂近期的新产品,它作为集散型 CENTUM 系列的输入输出中心。CENTUM 系列平时由带有 CRT 的控制柜(OPS)或控制台(DOC)来操作,当来自计算机的上位信息异常时,LDU 起备用保护作用,可作手动或自动调节。它在设计上考虑与 J 系列的统一性,在操作性方面和外观方面极力与 J 系列调节器相配合。LDU 通过插板 AIS 或 ABS 与上位机联接,它有测定值、设定值指示,能进行状态变更,能对输出值进行操作(并有硬手操功能),有报警设定及报警功能,能任 LDU is Yokogawa’s recent new product, which acts as a distributed CENTUM series of input and output centers. The CENTUM series is usually operated by a control cabinet (OPS) or console (CRT) with a CRT. The LDU functions as a back-up protection when superordinate information from the computer is abnormal and can be adjusted manually or automatically. It is designed with the J series in mind the unity, in terms of operability and appearance with the J series regulator. LDU board through the board AIS or ABS and the host computer connection, it has the measured value, set value instructions, can change the state, the output value can be operated (and hard hand operation), alarm settings and alarm functions, Can be any