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DC 12V 3Bit PWM 4-Wire Fan Temperature Controller 3A Speed Governor for PC Fan/Alarm

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  It is a PWM 4-Wire fan temperature controller. It has three PWM outputs, each of which can manually adjust the output ratio.
  1>.Three PWM outputs
  2>.Three-way synchronous speed controlled by temperature probe
  3>.Four classic three channels support fan stall alarm control temperature zone combination
  4>.Supports anti-sequence control
  5>.Three on-board indicators indicate current fan status
  1>.Product Name:PWM 4-Wire Fan Temperature Controller
  2>.Work Voltage:DC 8V~18V
  3>.Fan Current:3A(MAX)
  4>.PWM Output Range:10%~100%
  5>.Temperature Probe Parameters:50K B=3950
  6>.Stall Alarm Speed Threshold:300rpm(conventional 2 pole fan)
  7>.Work Temperature:-25℃~85℃
  8>.Work Humidity:5%~95%RH
  9>.Sensor Length:10cm
  1>.Please note that this product is a four-wire PWM fan controller. It can only control four-wire fans that comply with Intel's four-wire standardized protocol (all chassis and CPU four-wire fans are in compliance. Most violent fans can also be controlled, including anti-sequential),but can not control two or three-line fans, can not completely turn off the fans.
  2>.Input Voltage is DC8V~18V. This is the voltage supported by the board, used to control the 12V fan,please pay attention to the working range of the fan.
  3>.The fan current is not bigger than 3A per channel. If you need to control a larger current fan, please connect the fan power cord separately.
5.Setting Instructions:
  1>.Manual speed adjustment: speed adjustment through three adjustable resistors on the board.It is recommended to adjust the speed in a low temperature state where temperature control does not work.
  2>.Temperature control temperature zone setting: The temperature zone is set by the combination of the switches T1 and T2 (No.1~2) of the DIP switch. The specific temperature zone is described in the table on the back of the board. After the setting is modified, it must be powered off and restart to take effect.
  3>.Anti-sequence support:When the DIP switch PF(3) is set to "ON", the output PWM changes in the reverse direction,which is used to control the anti-sequence fan. After changing the setting, it needs to be powered off and restarted to take effect.
  4>.Stall alarm setting: FAN1 always turns on the alarm,FAN2 and FAN3 control whether to turn on the alarm buzzer through the 4 and 5 bits (B2 and B3) of the DIP switch.For example, when both B2 and B3 are set to "ON". If any one of the three fans stopsthe buzzer will sound an alarm.
  5>.Indicator light on the board:When the fan of the corresponding channel is always on,flashing means that there is no speed signal of the corresponding channel,indicating that the fan of the channel is stopped or not connected (the fan wire sequence is wrong or the speed signal port is damaged).
6.Common Problem:
  1>.The fan does not turn: the wire sequence is wrong,the fan is damaged or the voltage does not match.
  2>.The fan is not controlled: The fan is not a standard four-wire PWM fan or the fan has a 3-4 wire sequence error.
  3>.Reverse change of fan speed: For anti-sequence fans, you need to set the DIP switch PF to "ON" and enable the anti-sequence control mode to work after re-energizing.
7.Four-wire Fan Characteristics:
  1>.The four wires of the four-wire fan are composed of the power supply negative pole,the power supply positive pole,the speed measurement signal line and the PWM control line.
      First of all,you should find the fan's power line.Generally, if the fan has red and black wires, the red is the positive power supply and the black is negative Level,if there is no red fan,it is generally yellow wire positive and black wire negative. After the power is turned on,the fan runs at full speed.
    After connecting the other two wires (not connected elsewhere),the fan speed will be significantly reduced. Disconnect the two wires and connect the control wire to the negative pole,the fan will run at a lower speed(some fans will stop)  Note that this last step can be used to find the control line,because the speed line is not connected to the negative pole of the power supply.
  2>.The control line and speed measurement line of the fan cannot be connected to the positive pole of the power source.
  1>.1pcs PWM 4-Wire Fan Temperature Controller
  2>.1pcs Buzzer
  3>.1pcs Temperature Sensor
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DC 12V 3Bit PWM 4-Wire Fan Temperature Controller 3A Speed Governor for PC Fan/Alarm