E90-DTU(400SL42) LoRa digital radio remote communication, SX1268 wireless data transmission station, RS485/RS232 relay network
[Transmission power]：15W
[Communication distance]：30km
[Product size]：124*109.1*35.2mm
[Introduction]：E90-DTU(400SL42) is a real high-quality industrial-grade wireless data transmission radio. The radio adopts LORA spread spectrum technology. Its strong anti-interference ability makes wireless communication more stable and reliable in industrial sites. It has a variety of transmission methods, works in the (410.125～493.125MHz) frequency band (default 433.125MHz), and the radio station provides a transparent RS232/RS485 interface. LoRa direct-sequence spread spectrum technology will bring a longer communication distance and has the advantage of strong anti-interference ability. The module has a software FEC forward error correction algorithm, which has high coding efficiency and strong error correction ability, greatly improving reliability and transmission distance. The radio has the function of data encryption; it supports the setting of packet length, and supports different real-time and data packets.
| Model Specifications | Working frequency (Hz) | Transmitting power (W) | Reference distance (km) | Specifications | Recommended Application Scenarios |
| E90-DTU(400SL42) | 433.125M | 15 | 30 | LoRa spread spectrum anti-jamming | Suitable for long-distance, interference-prone environments |
Note: Sunny weather, open environment without shelter, 12V/4A power supply, 5dBi suction cup antenna, the height of the antenna from the ground is 2 meters, and the factory default parameters are used.
| serial number | project | Specification | illustrate |
| 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 the needs of industrial use |
| 4 | Antenna Impedance | 50Ω | Standard 50Ω characteristic impedance |
| 5 | voltage range | 12±1VDC | It is recommended to support instantaneous current 4A |
| 6 | Communication Interface | RS232/RS485 | Standard DB9 socket/5.08 terminal blocks |
| 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 range (Hz) | Channel spacing (Hz) | number of channels |
| E90-DTU(400SL42) | 433.125M | 410.125～493.125M | 1M | 84, half duplex |
Note: In the same area, multiple sets of digital radios are used for one-to-one communication at the same time. It is recommended that each set of digital radios be set with a channel interval of more than 2MHz.
Transmit power level
| Model Specifications | 10/15W |
| E90-DTU(400SL42) | Software adjustable, default 15W |
Air Speed Class
| Model Specifications | Default air rate (bps) | number of grades | Air rate class (kbps) |
| E90-DTU(400SL42) | 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, if the speed meets the requirements of use, it is recommended that the air speed be as low as possible.
Current parameter
| Model Specifications | Supply voltage (V) | Emission current (A) | Waiting current (mA) |
| E90-DTU(400SL42) | 12±1 | 2.5~3.5 | 45 |
Send and receive length and subpackage method
| Model Specifications | cache size | Subcontracting |
| E90-DTU(400SL42) | 1000 bytes | Subpackage 32/64/128/240 bytes can be sent by command setting |
Note: 1. If the single data received by the station is greater than the capacity of a single packet, the excess data will be automatically allocated to the second transmission until the transmission is completed;