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2pc RS232 wireless PCB transceiver SYSTEM 500mW 433M EW73, the Low power wireless module, is used as the wireless data transmission in short distance. With the small size, weight and power consumption and good stability and reliability, it has the function of bi-directional data sign transmission, test and control. User selectable ( default 9600) below speed for interface and via-air baud rate: Channel speed rate: 1200/2400/4800/9600/19200/38400Bit/s, User can Choose one Interface speed rate: 1200/2400/4800/9600/19200/38400Bit/s, User can Choose one 1.Ultra low power transmission Transmission power :500mW, high receiving sensitivity: -123dbm , size: 58mm*38mm*10 mm. Receiving current<45mA?transmission current<360mA?sleeping current < 1mA. EW73 have three saving power models: awaken from Hardware, awaken from COM Port, awaken from air (the user need to ask for it before place an order). EW73 have 2 on-off input ports, 2 on-off output ports. 5. ISM frequency band, not requiring on application of frequency point Carrier frequency of 433MHz?also capable of 868/915MHz. 6. High anti-interference and low BER (Bit error Rate) Based on the GFSK modulation mode, it adopts the efficient communication protocol. The actual bit error rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is 10-2. Within the range of visibility, the reliable transmission distance is?BER=10-3/1200bps? >3000m when the antenna height is greater than 2000m (BER=10-3/9600bps). 8. Transparent data transmission Transparent data interface is offered to suit any standard or nonstandard user protocol. Any false data generated in the air can be filtrated automatically (What has been received is exactly what has been transmitted). The charge time for receiving and sending <10ms. The standard EW73 configuration provides 16 channels. to meet the multiple communication combination mode of the users. It has baud rate to 9600bps. 10. High speed wireless communication and large data buffer When the speed rate in the air is quicker than interfaceÂ’s, allowing to transmit unlimited length data at one time, when the speed rate is slower or equal the interfaceÂ’s, allowing the transmission of 255 Bytes long data frames at one time for more flexible programming by users. 11. Intelligent data control and the user doesnÂ’t need to prepare excessive programs Even for semi duplex communication, the user doesnÂ’t need to prepare excessive programs, only receiving/transmitting the data from the interface. EW73 will automatically complete the other operations, such as transmission/receiving conversion in the air, control, etc. 12. High reliability, small and light Single chip radio- frequency integrated circuit and single chip MCU are used for lessened peripheral circuits, high reliability, and low failure rate. Watchdog monitors the inner function, so that change the traditional product structure and improve the product reliability. Definition of connecting pins and connection method: Description Level Connected to the terminal Low level to sleep, High level awake To avoid to connect the interface reverse and can not communicate, please check and assure the voltage of 2 and 3 pin is existing by using Multimeter. If there is one pin that has the voltage, another has not voltage, which means the interface is connected reverse, please change the connection wires between pin 2 and 3. EW73 uses DC power supply with voltage of +5V. It can also share power supply with other equipment, however, the high quality power supply with desirable ripple factor should be selected. In addition, the reliable grounding must be used if there is other device in the system equipment. In case of failure to connect with the earth, it can form its own grounding, but it must be absolutely separated from the municipal electric supply. EW73 have three Saving power models: awaken from Hardware, awaken from COM Port, awaken from Air. The model can be set by RF Module software. You can choose one saving power model, the default model is awaken from Hardware. When EW73 sleeping in this saving power model, the current is under 100uA. Sleeping status: when you input low level at NO. 5 pin, EW73 can sleep. In this status, EW73 cannot transmit and receive data. Normal work status: when you input High level at NO. 5 pin, EW73 turn into Normal work status, 10ms later, EW73 can transmit and receive data. Remarks: if you keep the NO. 5 pin untouched, then EW73 in Normal work status. When EW73 sleeping in this saving power model, the current is under 11mA. When you input data to EW73 with COM port, EW73 turn into Normal work status after 10mS and can transmit the data. When EW73 did not receive data in COM port in the period of 20 seconds, EW73 will turn into sleep status. When EW73 sleeping in this saving power model, the current is under 20mA. When EW73 in this saving power status, EW73 works intermittently. When EW73 received awaken data from air, EW73 will turn into normal work status after 10ms, it can receive data normally. When EW73 did not receive data from air in the period of 20 seconds, it will turn into sleep. So when you wake up EW73 from air, you can transmit some useless data firstly. Technical specification of EW73 Receiving sensitivity: -123dBm Change time for receiving and sending: <10ms Interface data format: 8E1/8N1/8O1 Working humidity: 10%?90% relative humidity without condensation For warranty parts and service: Will send a replacement unit within warranty period upon received the defective unitSpare parts are available upon providing parts number, (all content is the responsibility of the poster) |
e-lewis@oklahomaselltoday.com (Elnora Lewis) for more information. All emails will be forwarded to the poster's actual email address.