1-2 Appearance and Names of Parts Names of Parts (When the Digital Operator is Removed) 1 FREQ adjuster knob Overview Digital Operator Communications connector Digital Operator connection plug POWER LED indicator ALARM LED indicator RUN (RUN LED indicator) Control circuit terminal block A Control circuit terminal block B Relay output terminals Input logic selector RS-485 communication/ Operator selector Main circuit terminal block Frequency reference/ Run command selector 1-6