Fault-tolerant data processing system

A fault-tolerant data processing system comprises groups (TMR) of identical binary data signal supplying and processing computer units (SRU) and one logical decision unit (voter) which votes on the data signals of the group (TMR). Hiebei a plurality of groups (TMR) with at least three, data signal supplying or processing computer units (SRU) connected to each other via data channels (K1, K2, K3) and the voters of a group are connected to the voters of other groups via data or signal lines , Each computer unit (SRU) supplying or processing data can have at least one voter for deciding on the accuracy of input and / or output signals.