The PZ80 is an independent development of GDR based company Geräte- und Reglerwerk Teltow. There was a need for efficient train protection systems by the Deutsche Reichsbahn. They wanted to gain independence of the technically obsolete I 60 supply by the West-German Siemens manufacturer and replacement imports of the Romanian I 60 Icret. The PZ80 supported all Indusi 60 modes enhanced with a number of new modes including speed control in steps of 10 km/h, continuous braking curves and a restrictive mode. In 1990 the developer was sold by the Treuhand institution to Siemens. So this system was the foundation of the upcoming PZB90 system.
