Development of a two-wire supervisory control system with remote metering
R. J. Wensley, W. M. Donovan · Journal of the A.I.E.E. · 1930
This paper describes the conditions leading up to the development of the two-wire supervisory control system. It enumerates the outstanding requirements of supervisory control systems in general and indicates a number of the advantages of the two-wire system. It provides a brief description of the operation of the system.