• The module complies with international safety standards, control area load area isolation groove;
• Genuine relay Songle;
•  With the power and relay action instructions, pull bright disconnect does not shine;
•  When a signal in the signal input terminal, the common terminal and the normally start conduction;
•  Microcontroller development board can be used as a module that can be used as a home appliance control;
•  The control of the DC or AC signal, can control 220V AC load;
•  There is a normally open and a normally closed contact;
• Blue KF301 terminals to the line of control is more convenient.

Description of the high and low trigger, friends do not understand Take a look at:

• High level trigger is a trigger voltage between the signal input and ground can be understood as a way of the signal input terminal and VCC cathode short trigger;

• Low trigger means is the voltage between the signal input terminal and the ground for the OV trigger mode can be understood as a way of the signal input terminal and GND negative short trigger