16 Relay Board With Opto Coupler Input and 10A Outputs. For Arduino, Raspberry etc.
This relay board comes with 16 high current print relays, capable of switching up to 10A @ 250VAC (or 30VDC). The inputs are opto-insulated.
The relay board has 5V logic level compatible inputs (sink), and needs a 12-24V power supply for the relays. The board contains a 12V switching power supply to provide the relay voltage. Each relay draws about 30mA @ 12V DC; a 12-24V DC power supply with at least 6W is recommended.
The inputs are LOW active. It means, the output of an micro controller (like Arduino or Raspberry) draws the input current to GND. The LOW level activates the relay, a high level (or 3-state level) deactivates the relay.