| 摘要 |
PURPOSE: To enable total monitoring and control of all operating elements by arranging a functional module, extension module, network control module, respective power source modules and communication terminal board on a single base frame. CONSTITUTION: A network control unit 10 is connected to various network communication buses N1, N2 and L2. A base frame 18 of the unit 120 connects the buses N1, N2 and L2, external power source and a main printed wiring board assembly on the back. The frame 18 includes a large number of terminal board frames 52, a functional module 12, a network control module 14, a digital control module 15, an extension module 16 and a power source module 17. The bus N1 is connected through a communication control board assembly 120 to an operator work station A or another network control unit B. The bus N2 is connected to the sub-module N2 of the module 14 and a network extension unit C. The bus L2 is connected through the assembly 120 connected to a controller D to the sub-module L2 of the module 14. |
