今天我們來了解帶通訊功能、不帶使能功能，EC風機的接線方式。.

Today we will learn about the wiring methods of EC fans with communication function and without enabling function

以K3G280產品為例

Take K3G280 product as an example   

該風機接三相電源，電源線接L1,L2,L3地線接PE，0-10V/PWM信號端口和GND端口之間接模擬量0-10V或PWM控制信號，控制風機轉速。

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端口之間輸出模擬量0-10V，反饋風機轉速。

RSA端口RSB端口之間接EC control軟件，或第三方通訊軟件用于修改參數，控制或監視風機運行，

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.

上電后，+10V端口輸出10V直流電，可以配合電位計接到IO2端口，實現對風機的無級調速。   

+10v端口輸出10v直流電，COM端口、NC端口和NO端口為繼電器輸出，用來反饋風機故障。 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端口為公共端，NC端口為常閉觸點，NO端口為常開觸點，以供電異常為例，供電正常的時候，COM、NC閉合。供電異常的時候，COM、NC斷開，NO常開觸點和NC相反。風機上電，就能正常運轉了。

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.