[Puissance de transmission]:15 W
[Distance de communication]:30 km
[Poids du produit]:425 ± 5 g.
[Introduction]:E90-DTU (400SL42) est une radio de transmission de données sans fil de qualité industrielle de très haute qualité. La radio utilise la technologie à spectre étalé LORA.La coque adopte un revêtement à trois niveaux : antifongique, anti-humidité et anti-sel. Sa forte capacité anti-interférence rend les communications sans fil plus stables et plus fiables dans les sites industriels. Il dispose d'une variété de méthodes de transmission et fonctionne dans la bande de fréquence (850,125 ~ 930,125 MHz) (868 MHz par défaut). La station radio fournit une interface RS232/RS485 transparente. La technologie LoRa à spectre étalé à séquence directe apportera une distance de communication plus longue et présente l'avantage d'une forte capacité anti-interférence. Le module dispose d'un algorithme logiciel de correction d'erreur directe FEC, qui présente une efficacité de codage élevée et une forte capacité de correction d'erreur, ce qui améliore considérablement la fiabilité et la distance de transmission. La radio dispose d'une fonction de cryptage des données ; prend en charge le réglage de la longueur des sous-paquets, prend en charge différents paquets de données et en temps réel.
| 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.