we77WE77Ex-1 230V; WE77Ex-1 230V Switch Amplifier. Key Benefits at a Glance . 1-channel; Control circuit EEx ia IIC; 230 V AC supply voltage; Reversible mode of operation; Lead2 Subject to reasonable modifications due to technical advances. Copyrht Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany +49-621-776-0