... PLC. Another, it can transmit data from apparatus (thermometer, humidity meter, electric meter, flow meter) to user or monitoring center ... GSM DTU). (The Different from RTU5010 is the GSM Controller RTU5011with 8 Digital NC/NO inputs,8 relay drivable Outputs, 4 Analog ... 9600,n,8,0,1>>Temperature: -20-+70 °C>>Humidity : Relative humidity 95% (condensation free)>>Output drive voltage: Equal to input ...