·9·Chapter 2 Product IntroductionItems S900 EOther FunctionsPID Control Built-in PID controlRS485 Standard RS485 communication function(MODBUS)FrequencySettingAnalog input:0 to 10V, 0 to 20mA can beselected;Digital input: Input using the setting dial of theoperation panel or RS485or UP/DOWN.Multi-speed Six multifunction input terminals, 15 sectionspeed can be setAutomaticvoltageregulationAutomatic voltage regulation function can beselectedCounter Built-in 2 group of countersProtection/WarningFunctionOverload 150%, 60second (Constant torque)Over Voltage Over voltage protection can be set.Under Voltage Under voltage protection can be set.OtherProtectionsOverheat ,output shortcircuit, over current, andparameter lock and so on.EnvironmentAmbientTemperature -10℃ to 40℃ (non-freezing)AmbientHumidity Max. 95% (non-condensing)Altitude Lower than 1000mVibration Max. 0.5GStructureCooling Mode Forced air coolingProtectiveStructure IP 20InstallationMode Wall Mounted2-4 Product seriel models