[Potencia de transmisión]：15W
[Distancia de comunicación]：30 km
[Peso del producto]：425 ± 5 g
[Introducción]：E90-DTU(900SL42) es una radio de transmisión de datos inalámbrica de grado industrial verdaderamente de alta calidad. La radio utiliza tecnología de espectro ensanchado LORA. Su fuerte capacidad antiinterferencia hace que las comunicaciones inalámbricas sean más estables y confiables en sitios industriales. Tiene una variedad de métodos de transmisión y funciona en la banda de frecuencia (850.125~930.125MHz) (868MHz predeterminado). La estación de radio proporciona una interfaz RS232/RS485 transparente. La tecnología de espectro ensanchado de secuencia directa LoRa brindará una distancia de comunicación más larga y tiene la ventaja de una fuerte capacidad antiinterferencia. El módulo tiene un algoritmo de corrección de errores directos FEC de software, que tiene una alta eficiencia de codificación y una gran capacidad de corrección de errores, lo que mejora en gran medida la confiabilidad y la distancia de transmisión. La radio tiene función de cifrado de datos; Admite configuración de longitud de subpaquete, admite diferentes paquetes de datos y en tiempo real.
| Model specifications | Operating frequency (Hz) | Transmitting power (W) | Reference distance (km) | Specifications and features | Recommended application scenarios |
| E90-DTU(900SL42) | 868.125M | 15 | 30 | LoRa spread spectrum anti-interference | Suitable for environments with long distances and susceptible to interference |
Note: Sunny weather, open environment without obstruction, 12V/4A power supply, 5dBi suction cup antenna, the antenna is 2 meters above the ground, and the factory default parameters are used.
| No. | Item | Specification | Description |
| 1 | Product Size | 124*109.1*35.2mm | See installation dimensions for details |
| 2 | product weight | 425g | Weight tolerance 5g |
| 3 | Operating temperature | -40℃～+85℃ | Meet industrial grade use requirements |
| 4 | Antenna impedance | 50Ω | Standard 50Ω characteristic impedance |
| 5 | voltage range | 12±1V DC | It is recommended to support instantaneous current 4A |
| 6 | Communication Interface | RS232/RS485 | Standard DB9 female/5.08 terminal block |
| 7 | baud rate | Factory default 9600 | Baud rate range 1200～115200 |
| 8 | address code | Factory default 0 | A total of 65536 address codes can be set |
Frequency range and number of channels
| Model specifications | Default frequency (Hz) | Frequency band range (Hz) | Channel spacing (Hz) | Number of channels |
| E90-DTU(900SL42) | 868.125M | 850.125～930.125M | 1M | 81, half duplex |
Note: When using multiple groups of digital radio stations to communicate one-to-one at the same time in the same area, it is recommended that each group of digital radio stations set a channel spacing of more than 2MHz.
Transmit power level
| Model specifications | 10/15 W |
| E90-DTU(900SL42) | Software adjustable, default 15W |
Air speed class
| Model specifications | Default air rate (bps) | Number of levels | Air rate level (kbps) |
| E90-DTU(900SL42) | 2.4k | 8 | 0.3、1.2、2.4、4.8、9.6、19.2、38.4、62.5 |
Note: The higher the air speed setting, the faster the transmission rate and the shorter the transmission distance; therefore, when the speed meets the usage requirements, it is recommended that the lower the air speed, the better.
Current parameters
| Model specifications | Power supply voltage (V) | Emission current (A) | Waiting current (mA) |
| E90-DTU(900SL42) | 12±1 | 2.5~3.5 | 30 |
Transmitting and receiving length and packetization method
| Model specifications | Cache size | Packaging method |
| E90-DTU(900SL42) | 1000 bytes | Subpackage 32/64/128/240 bytes can be set by command to send |
Note: 1. If the data received by the radio in a single time is greater than the single packet capacity, the excess data will be automatically allocated to the second transmission until the transmission is completed;
2. The data received by the radio station at a time cannot be larger than the buffer capacity.