VForewordGeneralThis document mainly introduces product function, structure, networking, mounting process,debugging process, WEB operation and technical parameters of modular VTO, which ismatched with Version 3.12 WEB interface.ModelsVTO2000A-C, VTO2000A-B, VTO2000A-K, VTO2000A-R and VTO2000A-F.Device UpgradePlease don’t cut off power supply during device upgrade. Power supply can be cut off only afterthe device has completed upgrade and has rebooted.General Description about Keys OK: it is used to save the settings. Default: it is used to restore all parameters at the present interface to default systemconfigurations. Refresh: restore parameters at the present interface to present system configurations.Safety InstructionsThe following categorized signal words with defined meaning might appear in the Manual.Signal Words MeaningIndicates a high potential hazard which, if not avoided, will resultin death or serious injury.Indicates a medium or low potential hazard which, if not avoided,could result in slight or moderate injury.Indicates a potential risk which, if not avoided, could result inproperty damage, data loss, lower performance, or unpredictableresult.Provides methods to help you solve a problem or save you time.Provides additional information as the emphasis and supplementto the text.Revision History