Connect 5v 30a relay with Arduino Uno I have previously connected 5V 10A relay switches to my Arduino.

But for my new project I need to use a 5V 30A relay switch with my Arduino.

In 10A relay switches, we make connection with Arduino using GND, VCC and IN.

But for 30A switches, there are DC+, DC-, IN.

My question is that, how do I connect my Arduino to the relay using these pins?
From the Amazon page you linked to: 


  1 dc+ : Dc power supply positive pole
  2 dc- :Dc power supply negative pole (i.e. ground)


Arduino:
VCC: positive DC power supply
GND: ground

technically, VCC = the voltage at the collector of a transistor, these days it's used as shorthand for the positive output pin of an IC.