大容量及超大容量开关量输入扩展电路逻辑的研究

RESEARCH ON TEXTENSION CIRCUIT LOGIC OF THE ON/OFF TYPE INPUT WITH MULTI-AND SUPERMULTI-LINES

本文作者所提出的方案和研制的系列扩展模板，是为了在ＳＴＤ机笼外任意扩展开关量输入点数而专门设计的，这一成果完满地解决了工业现场任意多点（几百点，甚至上千点）开关量的输入问题。

The project researched and the series of the extension cards developed by the author of this paper are designed specially for arbitrary extension of the ON/OFF input lines outside the STD BUS racks. Using this result, the problem about input of very big amount of ON/OFF points (several hundreds, or even thousands of input points) at the industrial fields has been solved successfully and satisfactorily.