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; Lead2 Subject to reasonable modifications due to technical advances. Copyrht Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany +49-621-776-0