The USB-RLY08B relay module board has 8x volt free contact relay outputs each having a current rating of up to 1A. The board is powered from any standard USB bus and the unit has an exceptionally low maximum current consumption of approx. 90mA with all relays on. All relays are of the SPCO (Single Pole Change Over) type and the normally open, normally closed and common pins are all available on the screw terminals.
Control of the board is via USB bus and there are various LED indicators to provide performance tellback. Each relay has a red LED mounted immediately next to it to indicate a powered state, there are 2x LEDs that will flash with USB transactions, green indicating reception of data from PC and yellow for transmission of data to the PC. On the opposite side of the board to the USB connector a red LED is mounted to provide indication of power.