: 1.This module conform international safety standard,the isolation groove between control areas and load area. 2.Using double-sided FR-4 circuit board design,high-end patch production process. 3.Using authentic relay control. 4.This relay has relay action instructions,pull on,disconnect off. 5.When the signal input terminal has a low-level signal,the common pin and the normally-open pin will conduct. 6.Relays can directly control a kind of equipment and loads. 7.Each relay has 8 normally open and 8 normally closed contact.Can be selected by jumper relay and TTL or ground. 8.Blue KF301 terminal connect the control line more convenient. 9.This product passed the 100% functional test and stability test. 10.VCC:conncet to Positive 12V power supply 11.GND:connect to negative 12V power supply 12.IN1-IN8:signal trigger,active low 13.Relay output:Has 12-wire interface,all interfaces can be directly connected to lead out,easy to use. 14.NO1--NO8:Relay normally open interface,before the relay suction the interface is unconnect, after suction the interface will short connect to COM. 15.COM1--COM8 relay public interface. 16.NC1--NC8: Relay normally closed interface,before the relay suction short connect to COM,after suction the interface will pull open. Package include: 1x 8 Channel Relay

Suitable for various platforms such as 51/AVR/AVR/ARM. A fixing screw holes, easy to install. Standard interface can be extended on various development boards. The 8 channels are optically isolated, safe, reliable, anti-interference. Widely used for all MCU control, industrial sector, PLC control, smart home control. Using a large current relay, AC250V 10A DC30V 10A.