[Introduction]:E90-DTU(900SL42) is a truly high-quality industrial-grade wireless data transmission radio. The radio uses LORA spread spectrum technology. Its strong anti-interference ability makes wireless communications more stable and reliable in industrial sites. It has a variety of transmission methods and works in the (850.125~930.125MHz) frequency band (default 868MHz). The radio station provides a transparent RS232/RS485 interface. LoRa direct sequence spread spectrum technology will bring 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 capability, which greatly improves reliability and transmission distance. The radio has data encryption function; supports sub-packet length setting, supports different real-time and data packets.
Pin number | Name | Function | Description |
1 | GND | Pressed wire power input negative pole | Power reference ground |
2 | VCC | Pressed line power input positive pole | Power input (12V/4A) |
3 | MOD | Mode control | Floating, normal mode; grounded, configuration mode |
4 | RS485 G | RS485 interface G | RS485 interface G is connected to the GND interface of the device (recommended connection) |
5 | RS485 B | RS485 interface B | RS485 interface B is connected to device B interface |
6 | RS485 A | RS485 interface A | RS485 interface A is connected to device A interface |
7 | RS232 | RS232 interface | Standard RS232 interface |
8 | ANT | SMA-K interface | Externally threaded inner hole, length 10mm, characteristic impedance 50Ω |
9 | UPDATE | - | Hidden buttons, users don’t need to care |
10 | PWR | Power Indicator | Red, lights up when power is on |
11 | TXD | Serial data sending indicator light | Yellow, flashing when sending data |
12 | RXD | Serial port data receiving indicator light | Yellow, flashes when receiving data |
13 | ERR | warning light | The antenna is not connected or the voltage or temperature is abnormal. After the abnormality of the unconnected antenna is resolved, it needs to be powered on again to work normally. |