we77WE77-EX2 - Free download as PDF File (.pdf), Text File (.txt) or read on for free. Transformer isolated barrier transfers dital snals into hazardous areas. SensorsWE77Ex-1 230V 1-channel Control circuit EEx ia IIC 230 V AC supply voltage Reversible mode of operation Lead breakage (LB) monitoring 1 relay contact output (change-over