Easy protocol adaptation. Can be directly connected to the existing ModBus system without worrying about protocol matching issues. High-precision acquisition. Calibrated before leaving the factory to AD acquisition accuracy. The resolution of 16-bit ADC can reach 0.1℃ High protection isolation. Supports RS485 isolation, power isolation (2000V), power reverse connection protection; Thunder protection and surge protection, high protection electrical isolation. Soft and hard dual watchdog. Reliable and stable operation without crashes. Industrial-grade chips can operate stably and reliably for a long time. Use in wide temperature environment. Strictly tested at -40℃-85℃ to stable operation of the equipment in an industrial environment. Sensor type:4-way PT100 thermal resistor (2/3-wire system) Communication protocol:standard Modbus , Modbus RTU protocol Communication interface:Ethernet port, RS485 Display:OLED display Configuration method: offline configuration by key, host configuration Working voltage:DC8 - 28V Temperature measurement range:-200℃-850℃ Resolution:0.1℃ Accuracy:±1℃ Working temperature:-40℃-85℃ Isolation:serial port, power supply double isolation Installation method:guide rail, screw installation Colour:Blue Material:ABS Package Contents: 1 * Temperature Acquisition Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.