1-2 Appearance and Names of Parts 3G3MX-A2015 to A2037, 3G3MX-A4004 to A4037, 3G3MX-AE007 to AE022 1 Digital Operator FREQ adjuster Terminal block cover Overview Front cover Control circuit wiring hole Main housing Main circuit wiring hole Fin Bottom cover Ground terminal Control circuit terminal block A Control circuit terminal block B Top cover Relay output terminal block Main circuit terminal block Note: The top cover is intended for maintenance use only. Do not remove the top cover. 1-4