设置在该接收继电器上的一个开关连接一个通信信道，并且在通信信道和接收继电器之间提供一个连接的链路。
A switch provided at the receiving relay connects one communication channel and provides a connecting link between the communication channel and the receiving relay.
前端采集插头接收测试数据，切换继电器电路传递被测电路板信号。
Testing data is received with data acquisition plug, signal from tested circuit board is transferred by circuit of switch relay.
电路部分包含ADC模块、DAC模块、转速脉冲信号接收模块、继电器模块、电源模块、RS232通信模块和CAN通信模块。
Circuit section is composed of the ADC module, DAC module, rotation speed signal receiver module, relay module, power module, RS232 communication module and CAN communication module.
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