Industrial grade microcomputer of Microchip and components, more reliable. Push-button setting, easy ... accurate. Key Features 1.Industrial grade microcomputer of Microchip and components, more reliable2.Push-button setting, easy adjustment ... 485, Modbus-RTU (only choose one between 4~20mA and RS-485)6.Power supply: 220VAC, ±10%, 50Hz, ... Motor Protection Device (motor Protector, Protection Relay,monitor)