The E-Blocks 2 relay board provides two electrically controllable relays which act as isolated switches.
The external connections to the relays are provided using screw terminals and each relay features an LED to indicate when the relay is active. Two relay boards can be used on the same E-Blocks port by using a BL0156 Splitter board and setting the slide switch on each board to opposing positions.
If using this board with first generation upstream E-Blocks, then you will need an E-Blocks upstream to E-Blocks 2 downstream connector.
