今天我们来了解带通讯功能、不带使能功能，EC风机的接线方式。.
Today we will learn about the wiring methods of EC fans with communication function and without enabling function
以K3G280产品为例
Take K3G280 product as an example
该风机接三相电源，电源线接L1,L2,L3地线接PE，0-10V/PWM信号端口和GND端口之间接模拟量0-10V或PWM控制信号，控制风机转速。
The fan is connected to a three-phase power supply, the power cord is connected to L1, L2, L3 and the ground wire is connected to PE. The analog 0-10V or PWM control signal is connected between the 0-10V/PWM signal port and the GND port to control the fan speed.
OUT端口和GND端口之间输出模拟量0-10V，反馈风机转速。
RSA端口RSB端口之间接EC control软件，或第三方通讯软件用于修改参数，控制或监视风机运行，
The analog quantity 0-10V is output between the OUT port and the GND port to feedback the fan speed.
The RSA port and RSB port are connected to EC control software or third-party communication software for modifying parameters, controlling or monitoring fan operation.
上电后，+10V端口输出10V直流电，可以配合电位计接到IO2端口，实现对风机的无级调速。
+10v端口输出10v直流电，COM端口、NC端口和NO端口为继电器输出，用来反馈风机故障。 正十伏
After powering on, the +10V port outputs 10V DC, which can be connected to the IO2 port with a potentiometer to achieve stepless speed regulation of the fan.
The +10v port outputs 10v DC, and the COM port, NC port and NO port are relay outputs used to feedback fan faults.
其中，COM端口为公共端，NC端口为常闭触点，NO端口为常开触点，以供电异常为例，供电正常的时候，COM、NC闭合。供电异常的时候，COM、NC断开，NO常开触点和NC相反。风机上电，就能正常运转了。
Among them, the COM port is the common terminal, the NC port is a normally closed contact, and the NO port is a normally open contact. Taking abnormal power supply as an example, when the power supply is normal, COM and NC are closed. When the power supply is abnormal, , and the NO normally open contact is opposite to NC. Once the fan is powered on, it will run normally.
