Electromagnetic compatibility: Class 3 industrial equipment standard, including pulse train, static electricity, impact and radiation. Specifically, it is designed to prevent fast transient pulse train interference, electrostatic discharge, RF electromagnetic radiation interference, surge (impact) interference, voltage sag, short-term interruption and voltage change interference. 
With industrial grade CPU and various high-reliability peripheral devices, as well as motherboard + different function expansion modules, it ensures accurate and rapid error positioning, simple maintenance and replacement, and strong reliability.
It has all interfaces isolated, including power isolation (power isolator), signal isolation (optocoupler), etc., and is provided with protective measures such as lightning protection tube and resettable fuse.  
It is characterized by all surface mounted components, high-reliability connector, four-layer board design and separate layer and power layer. 
It is also characterized by programmable watchdog timer; photoelectric capacitor isolation (using optocoupler) at the input port, and transient voltage suppressor overvoltage protection (diode protection) at the analog interface.