product description:

1, the module in line with international safety standards, control area and the load area has a separate slot;

2, the use of Song Le genuine relay;

3, with power and relay action instructions, pull up bright, off is not bright;

4, the signal input signal, the common side and often open will turn on;

5, can be used as a single-chip development board module, can be used as home appliances control;

6, control the DC or AC signal, you can control the 220V AC load;

7, there is a normally open and a normally closed contact;

8, blue KF301 terminal control line is more convenient.

On the high level and low level trigger description, do not understand the friends please look at:

  High-level trigger refers to the signal input and the ground between the voltage trigger mode, can be understood as the signal input and VCC positive short-circuit trigger a way;

  Low-level trigger refers to the signal input and the ground between the voltage OV trigger mode, can be understood as the signal input and GND negative short-circuit trigger a way