Machine state monitoring device and system

The utility model discloses a machine state monitoring device and system, and the device comprises a housing and a circuit board disposed in the housing, and the circuit board is integrated with a digital input optocoupler isolation module, a power supply voltage reduction module, a level conversion module, and a control communication module which are used for collecting machine switching value signals. The signal output end of the digital input optocoupler isolation module is connected with the control communication module, the signal input end of the level conversion module is used for beingconnected to an RS232 interface of a machine, the signal output end of the level conversion module is connected with the control communication module, and the power input end of the power supply voltage reduction module is used for being connected to the power supply end of the machine. The power output end of the power voltage reduction module is connected with the control communication module.According to the utility m