Synchronous circuit and material testing machine for material testing machine

摘要

A synchronous controller 49 is connected to each of boards 51, 52, and 53 by one communication wire, and one communication path is formed between the synchronous controller 49 and each of the boards 51, 52, and 53. A multiple synchronization signal S in which a plurality of synchronization signals are multiplexed is transmitted from the synchronous controller 49 to each of the boards 51, 52, and 53. Signal extraction units 61a, 61b, and 61c as extraction means for recognizing synchronization signals included in the multiple synchronization signal S and extracting the individual synchronization signals are provided in the boards 51, 52, and 53, respectively. The individual synchronization signals are extracted from the multiple synchronization signal S input to the boards 51, 52, and 53 by the signal extraction units 61a, 61b, and 61c, respectively.