4 Way 5v Relay Module Shield (543)

Brand : Sumozade
Price : $3.50
1. This module conforms to the safety standard, the control area and the load area have isolation slot;
2. Adopt relay;
3, with power and relay instructions, pull in light, disconnect not bright;
4, when the signal input signal, the common end and the beginning will be open;
5, can be used as MCU development board module, can be used as home appliances 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 connecting control line is more convenient.
About the high and low level of the trigger mode, do not understand the friend, please look at:
High level trigger refers to the triggering mode of voltage between the input terminal and the ground, which can be understood as a way of short circuit triggering between the signal input and the VCC positive pole;
The low level trigger refers to the trigger mode of the voltage between the input and the ground of the signal OV, which can be understood as a way of short circuit triggering between the signal input and the GND negative pole