we77Switch Amplifier WE77Ex-2 230V 2-channel Control circuit EEx ia IIC 230 V AC supply voltage Reversible mode of operation Lead breakage (LB) monitoring 1 relay contact output (changeWE77Ex-1. Add item to compare Add to favorites Add to watchdog Share on Share on LinkedIn. Switch Amplifier 1-channel, 230VAC, Dital Input, Control Circuit EEx ia IIC, LB