... Data Module 2W RF Power, RS-232, RS-485 or TTL Interface Meter Reading,data tra 5Km Wireless Data Transceiver, 433Mhz RF Module ... , Meter Reading: YS-C30 series data radio designed for Serial (UART data) ... , PLC Control,Wireless Data Acquisition, SCADA;4. Installation dimension5. Interface definitionNOTE: Generally the module is in receiving status ...