This module is usefull for PWM dimming of power LEDs.
Universal module for relays. The module is equipped with two NMOSFETy that are designed for relay processor. Wiring module allows you to use two transistors alone without the relay as a switch to GND.
There are 8 solid state switching relays which can be digitally controlled by open collector. It can operate up to 8A on 250VAC.