we77OS-Ex-2G-WE77-Ex...ERU(ELMCRU)-NEW (1) - Free download as PDF File (.pdf), Text File (.txt) or read on for free. This document summarizes an Earth Relay Unit that provides safety2 Subject to reasonable modifications due to technical advances. Copyrht Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany +49-621-776-0