Low-cost analog quantity signal acquisition board and DIO board

The utility model discloses a low-cost analog quantity signal acquisition board and DIO board, the analog quantity signal acquisition board comprises a master control MCU board, a base board and an acquisition daughter board, the master control MCU board comprises an MCU master control module and a first inter-board connector, the acquisition daughter board comprises a plurality of analog quantity signal acquisition circuits, a second inter-board connector and a first serial port module, the bottom plate comprises a third inter-plate connector, an external connector, a TTL to serial port module and a fourth inter-plate connector. The multi-channel analog quantity signal acquisition circuit is separated from the MCU main control module, namely, a traditional analog quantity signal acquisition board is separated into the outsourcing acquisition daughter board, the self-developed bottom board and the self-developed main control MCU board, compared with a traditional whole board design, the design and processing