The USB-RLY16 relay module board has 8x relays providing volt free contact relay outputs each with a current rating of up to 16A. The processing hardware is powered and instructed from any standard USB bus and the power for the relays is via the 2.1mm DC power input adaptor, with a power supply of 12V DC ≥500mA required. The relays are SPCO (Single Pole Change Over) types and the normally open, normally closed and common pins are all available on the screw terminals.
Extensive LED indication is provided for monitoring purposes. There are red LEDs mounted adjacent to each relay to indicate a powered on state as well as a red power LED mounted near to the USB connector. USB data transactions are indicated by 2x LEDs, a green LED indicating reception of data and a yellow LED that indicates transmission of data from the board.
