Patent ID: 7945715

Claim:
A system for data transfer between microcomputer devices ( 1 , 8 ), wherein each of the microcomputer devices ( 1 , 8 ) contains at least one microprocessor ( 2 , 9 ), a microprocessor bus ( 3 , 10 ), and a coupling device ( 4 , 11 ) connected thereto, wherein the coupling device ( 4 , 11 ) provides a serial protocol, and wherein data transfer is performed between the microcomputer devices ( 1 , 8 ) via the coupling devices ( 4 , 11 ), said system comprising: a) the microcomputer devices ( 1 , 8 ) being spatially positioned within one system; b) each microcomputer device ( 1 , 8 ) being assigned its own, separate power supply ( 6 , 13 ); c) the coupling devices ( 4 , 11 ) providing a standardized serial protocol; d) the power supply regions ( 6 , 13 ) of the microcomputer devices ( 1 , 8 ) are switchable off and on individually and a respective power supply region ( 6 , 13 ) of a microcomputer device ( 1 , 8 ) which remains switched on remains uninfluenced by another microcomputer device ( 1 , 8 ); wherein a standardized serial ethernet protocol is used for the serial data transfer between the microcomputer devices ( 1 , 8 ); wherein the microcomputer devices ( 1 , 8 ) are spatially positioned on one board; and wherein a serial data connection ( 5 , 12 ) between the microcomputer devices ( 1 , 8 ) contains an electrical isolation ( 7 ).