12V CPU Fan Temperature Control PWM Speed Controller Alarm Bell Module SensorOOTDTY12V PC CPU 4 Wire PWM Fan Temperature Control Speed Control Module with Alarm + Buzzer & Sensor FeaturesSupport all 12V 4A fans, synchronous rectifier output, high efficiency Even if the high-voltage current does not require an additional heat sink! Multiple fans can be used in parallel (total current is not more than 5A), support automatic temperature control and manumotive speed control, temperature control speed with four temperature zones to set, easy to apply to various applications! It can be opened by the three-wire fan monitoring function (stall warning).1. Channel: temperature control2. Channel: Manual Control3. High temperature alarm4. Automatic Temperature Control Speed Adjustment SpecificationsWorking Voltage: DC12V Circuit Capacity: Maximum Current Per Output 4A, Bus Currents Up To 9A Output Range: First Channel 20%-100 or 40%-100 (TFL=ON)Second Channel and Third Channel 10%-100(Note: The above range only for PWM range, the actual control effect will vary depending on the fan.)Temperature sensor parameters: 50K B = 3950Thermostat temperature zone error: error depending on the temperature sensor, generally 3-5%Stall alarm minimum speed: 700-800 rpm Description of function setting switch:TFL (No.1): PWM setting of the lowest temperature channel when the power-on state of FAN1 PWM minimum is 40%, when the PWM minimum of FAN1 is 20% off. TP1 TP2 (No.2,3): temperature control temperature zones of the temperature channel are interpreted as follows (should be used with temperature sensor):TP1 TP2 temperature acceleration full speed temperature Off 35 C 45 CON OFF 40 C 55 C Switched Off at 50 C 70 C 60 C 90 C When the temperature is lower than the accelerated temperature, then output at the minimum rotation speed; When it exceeds full temperature, it always moves out at full speed. BF1 BF2 (No. 4.5): corresponds to FAN1 FAN2 switch stall alarm function, when the corresponding open channel fan breaks, the controller will alarm with sound and light (works with buzzle), the alarm will be automatically eliminated when the fan is rotated. If BF1 and BF2 are open (enabled), FAN1, FAN2 have one or both stops, the controller will sound an alarm! Package Included1x WS16 DC 12V 4A PWM PC CPU Fan Temperature Controller Controller Thermostat Speed Controller Switch1x Temperature Sensor1x Buzzle