we77WE77Ex-2 115V; WE77Ex-2 115V Switch Amplifier. Key Benefits at a Glance . 2-channel; Control circuit EEx ia IIC; 115 V AC supply voltage; Reversible mode of operation; LeadWE77Ex-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