Embedded ARM acquisition and control terminal

The utility model relates to an embedded ARM acquisition and control terminal. At least two RS232 interfaces are arranged, each RS232 interface is connected with a signal isolation circuit and a lightning protection isolation circuit, each signal isolation circuit comprises a signal conversion module, a coupling transformer, a Schmitt trigger and a bias voltage module, and each lightning protection isolation circuit comprises a piezoresistor and a power resistor. The embedded ARM acquisition and control terminal is advantaged in that the RS232 interfaces are redundant, the error-tolerant rate of an ARM main controller is increased, and each RS232 interface is provided with one individual signal isolation circuit and one individual lightning protection isolation circuit. Even if one interface is damaged by power supply or lightning, other interfaces are not affected and can work normally, furthermore, signals are isolated from one another, and influence of string data does not exist among the interfaces.