Devantech multichannel relay module boards devantech eth008 the eth008 relay module board provides 8x volt free contact relay outputs each having a current rating of up to 16a the module requires a 12v dc supply of at least 500ma which can be either regulated or unregulated all relays are spco single pole change over types the normally open normally closed and common pins are all available via screw terminals control of the relays is by simple tcpip commands via ethernet and each re