we77WE77Ex-1 230V; WE77Ex-1 230V Switch Amplifier. Panoramica dei principali vantaggi. 1-channel; Control circuit EEx ia IIC; 230 V AC supply voltage; Reversible mode of operation;WE77Ex-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; Lead