... ,4,8,16,32,64Process informationChannels8, Isolation inputSignal range±12V or 4~20mARotating speedChannels2Compatible typeTTL, Eddy current, ... ×260×150, metal shellProtection gradeIP65,waterproof, dust proofTemperature range(-40 ~ 60)°CHumidity95% RH without condensateElectromagnetism compatible authenticationPassed ... power source Online monitoring system for wind turbines