A system arrangement with differential data communication for use in a motor vehicle for the fault-tolerant and electromagnetically compatible control of a plurality of execution units of the system arrangement, having: - an instruction unit and a plurality of line driver units, the instruction unit being designed to send instructions to the execution units via the line driver units in order to control the execution units, in which: - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain; and - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain. - the line driver units are coupled in serial communication with one another by means of a second data line, and the serially connected first line driver unit is coupled in communication with the instruction unit by means of the second data line, the first data line and the second data line each being an electrical data line which is designed to always conduct current, characterized in that - each substring has at least two execution units along a first data line, - exactly one substring is placed directly downstream of each line driver unit, and - in which transmission of the instructions takes place with a bit sequence via the data lines, which is differentially modulated, and after transmission of the instructions, the data lines are not disconnected, but continue to send a differential quiescent pattern, so that differential modulation is always provided when the plurality of execution units is controlled. - an instruction unit and a plurality of line driver units, the instruction unit being designed to send instructions to the execution units via the line driver units in order to control the execution units, in which: - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain; and - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain. - the line driver units are coupled in serial communication with one another by means of a second data line, and the serially connected first line driver unit is coupled in communication with the instruction unit by means of the second data line, the first data line and the second data line each being an electrical data line which is designed to always conduct current, - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain; and - the plurality of execution units is segmented into a plurality of respective serial sub-chains, and a line driver is placed directly upstream of each sub-chain. - the line driver units are coupled in serial communication with one another by means of a second data line, and the serially connected first line driver unit is coupled in communication with the instruction unit by means of the second data line, the first data line and the second data line each being an electrical data line which is designed to always conduct current, characterized in that - each substring has at least two execution units along a first data line, - exactly one substring is placed directly downstream of each line driver unit, and - in which transmission of the instructions takes place with a bit sequence via the data lines, which is differentially modulated, and after transmission of the instructions, the data lines are not disconnected, but continue to send a differential quiescent pattern, so that differential modulation is always provided when the plurality of execution units is controlled. - each substring has at least two execution units along a first data line, - exactly one substring is placed directly downstream of each line driver unit, and - in which transmission of the instructions takes place with a bit sequence via the data lines, which is differentially modulated, and after transmission of the instructions, the data lines are not disconnected, but continue to send a differential quiescent pattern, so that differential modulation is always provided when the plurality of execution units is controlled.