In 1978 the company introduced its second generation intelligent RTU, the QUICS 3000, that included further enhancements of its noise immune architecture. The QUICS 3000 was widely deployed in a large number of electric utility and transit applications. The RTU architecture and construction were hardened specifically for application in high electrical noise and mechanical vibration environments of transit substations.
In 1975, the company was reorganized and its name was shortened to QEI Inc. (Quindar Electronics Incorporated) and continued to serve the same markets with innovative products and systems.
These research and development activities resulted in the introduction of the first fully computerized SCADA system in 1974. The system included a minicomputer-based master station with a standard, user configurable software package (SUPERCOMPILER II) and a microprocessor-based intelligent RTU (Quindett V). This was also the first application of intelligent RTUs as a protocol emulator where the RTU is installed in a foreign system and did not communicate with its native protocol. In this particular case, the Quindett V’s were installed in a General Electric SCADA system utilizing the GETAC protocol.
As we entered our second decade of operation in 1970, new technical developments presented significant opportunities with the maturing of the minicomputer technology and the advent of microprocessors. We immediately took steps to capitalize on these developments and established a software and firmware research and development group to bring applications of the new technologies to its mainstream business and its customers.
Founded in 1960 as Quindar Electronics Incorporated, QEI was an early adopter of solid-state technology for industrial applications with the introduction of the first transistorized voice frequency (audio tone) telemetry products for electric network monitoring and control applications. Quindar rapidly became the leading supplier of such products to the electric utility and the transit industry. With the advent of integrated circuits later in the decade, QEI introduced a full function SCADA system, the Quindett III, which was widely deployed in electric utility applications and became one of the first applications of a modern SCADA system in public transit at SEPTA. The Quindett system included full-function SCADA RTU utilizing high noise immunity integrated circuits. This first generation RTU also utilized a reliable control subsystem with Select Before Operate (SBO) logic to assure correct point selection and current sensing to detect multiple relay operations.