Solid State Control Design Using Logic Modules 690595
This paper discusses the NORPAK* solid state control system which is manufactured by the Square D Co. The NORPAK system employs a single function approach to logic design. This means that one function, the NOR, is used alone or in combination with other NOR's to achieve all logic functions. Knowing the one NOR logic function permits understanding of at least 90% of the logic components in the system.