The common faults of S1240 (ELC type) SPC exchange are in user mod ul e, relay module and metering module in daily maintenance work.

在对S1240 (elc型)程控交换机进行日常维护时，常见故障有用户模块、中继模块和计费模块的故障。

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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.

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。

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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.

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。

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