R8SPI 8 Channel Opto-Isolated Relay Board with SPI Interface
The Industrologic R8SPI is a versatile opto-isolated Serial Peripheral Interface (SPI) interface 8 channel relay board that can add medium current "Form C" relays not only to Industrologic products, but to a wide variety of microcontroller outputs, logic circuits, and PLCs as well. Screw terminal block connections for both the relay contacts and for the control signals provide the ultimate in I/O flexibility.
The isolation provided by the opto-isolators can provide an ideal interface for an Arduino relay board or a Raspberry Pi relay board.
R8SPI documents and information: