... hard disk tray, cooling fan modules, power supply. The controller uses high reliability VHDM connectors, ... clearly shows the states of fan, temperature, voltage,power supply and alarm info, ect. →Highly IntelligentDS1662-4MS ... traysFan Module3x1U turbofansSystem Control&IndicatorSystem alarm,power supply,voltage,fan,temperature monitoring,system resetDimension433mmx550mmx133mm(WxDxH)Operating ...