This relay module is 5V, signal trigger active low. It can be controlled directly by the microcontroller, with 3.3 - 5V signal. The inputs are opto-isolated to protect any delicate control circuitry. There are LED indicators for each channel - Low signal will trigger the relay and LED.
The relay module is able to control various appliances and other equipments with large current. Relay output maximum contact is AC 250V 10A or DC 30V 10A. Each channel consumes about 15 - 20mA current when active.
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