... -cycle heavy duty industial diesel engines, delivers reliable power, low emissions, and fast response to load changes.Alternator: Stamford ... instead of RS485, RS232, or USB port. Optional ultra low temperature function, the ambient temperature is from -40 °C to 70 °C.Cooling ... instead of RS485, RS232, or USB port. Optional ultra low temperature function, the ambient temperature is from -40 °C to 70 °C. ...