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5PCS 12V 2-Channel Relay Module with Optocoupler H/L Level Triger for Arduino

5PCS 12V 2-Channel Relay Module with Optocoupler H/L Level Triger for Arduino

Shared by: Jeffery Johnson from amazon
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Description
Relay output: 1. Normally closed pin (NC1) : channel 1 relay normally closed pin 2. Common pin (COM1) : channel 1 relay common pin 3. Normally opened pin (NO1) : channel 1 relay normally opened pin 4. Normally closed pin (NC2) : channel 2 relay normally closed pin 5. Common pin (COM2) : channel 2 relay common pin 6. Normally opened pin (NO2) : channel 2 relay normally opened pin High or low level trigger option: 1. S1:It is option switch for channel 1 relay; 2. S2:It is option switch for channel 2 relay; 3. It is low level triger if COM pin connect to LOW pin; It is high level triger if COM connect to High.

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