04539655 is referenced by 75 patents and cites 6 patents.

A distributed automated control network system consisting of a master host computer, network processing nodes for monitoring and control of work locations and a subhost node which interfaces the nodes and host computer. The subhost includes dual microprocessor configurations on a common bus, one for communications and one for control, operating 180.degree. out of phase. Each node can be configured from a variety of modular subsystems on a common bus including modules for network control, data acquisition, digital and analog inputs and outputs, display terminals and the like in accordance with system requirements. The nodes communicate via two fiber optic channels, one operating clockwise and the other counterclockwise with foldback capability in the event of a fault. A conventional signal back-up is also provided.

Title
Microcomputer based distributed control network
Application Number
6/358718
Publication Number
4539655
Application Date
March 16, 1982
Publication Date
September 3, 1985
Inventor
Paul F Rollins
Phoenix
AZ, US
Thomas D Hembree
Phoenix
AZ, US
Andre B Felix
Tempe
AZ, US
Gerald C Trussell
Laveen
AZ, US
Agent
Gregory J Nelson
Assignee
Phoenix Digital Corporation
AZ, US
IPC
H04J 3/08
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