... Energy Plus Harmonics 2.Multiple Communications Options 3.UL, cUL and CE Certified 4.Optional Ethernet, Web Server The ... Limit AlarmMulti Communication Ports (Eg: Ethernet, RS485)Web Server and Email SendingSwitch Status MonitoringRemote Switch ... , Dmd_Q, Dmd_S CommunicationRS485, Industry standard ModbusRprotocolModule Option: Ethernet module, Profbus-DP moduleDual RS485 communication portsRS-485 ( ...