product description:
1. This module complies with international safety standards, and the control area and the load area have isolation slots;
2. Use genuine high quality relays;
3. With power and relay action indication, the light is bright and the light is off;
4. When there is a signal at the signal input end, the common terminal and the normally open end will be turned on;
5. Can be used as a microcontroller development board module, which can be used as home appliance control;
6. Control DC or AC signal, can control 220V AC load;
7. There is a normally open and a normally closed contact;
8. Blue KF301 terminal is more convenient to connect to the control line.
For the description of the high-level and low-level trigger modes, please don't understand the friends:
The high level trigger refers to the trigger mode of the voltage between the signal input terminal and the ground, which can be understood as a way to trigger the short circuit of the signal input terminal and the VCC positive terminal;
Low-level triggering refers to the triggering mode of the voltage between the signal input terminal and ground is OV, which can be understood as a way to trigger the short circuit of the signal input terminal and the GND negative terminal.
