[Carrier frequency]：433.125MHz
[Interface type]：RS485/TTL
[Transmission power]：30dBm
[Communication distance]：10km
[Size]：84*82*25mm
[Weight]：133±5g
[Introduction]：E90-DTU (400SL30L) is a wireless data transmission radio using military-grade LoRa modulation technology. It has a variety of transmission methods and works in the (410.125~493.125MHz) frequency band (default 433.125MHz). The radio provides RS485 and TTL two kinds of serial communication Port, support 8~28V DC power supply or 4.2V lithium battery power input, support reverse constant current charging.
| Item | Description | |
| Operating Voltage | DC 8～28V | Support DC head and terminal power supply |
| Working current | DC powered | Standby current consumption: 11mA @ 12V Transmit current consumption: 288mA @ 12V Low power standby current consumption: 302uA @ 12V Transmit power is instantaneous power, standby power is average power |
| Battery powered | Standby current consumption: 21mA @ 4.2V | |
| Communication Interface | TTL | 3.3V-TTL serial level communication interface |
| RS-485 | Standard RS-485 communication interface | |
| Frequency Range | 410.125~493.125MHz | |
| Channel | 0～83, the default is 23, the channel interval is 1MHz | |
| Airspeed | 2.4、4.8、9.6、19.2、38.4、62.5Kbps，default 2.4Kbps | |
| Power regulation | Support 4 gear transmission power configuration | |
| Reverse charging | 120mA constant current charging, 4.2V preset charging voltage | |
| Distance | 10Km | |
| User configuration | Host computer and Modbus RTU command | |
| Operating mode | Transparent transmission, Modbus slave, low power consumption, | |
| Subcontracting mechanism | Support configuration as 32, 64, 128, 240Byte, default 240Byte | |
| Serial port baud | 1200、2400、4800、9600bps(default) | |
| Data bits | 7, 8 (default 8) | |
| stop bit | 1, 2 (default 1) | |
| Check Digit | NONE, ODD, EVEN (default NONE) | |
| Antenna interface | SMA-K, external thread internal hole | |
| Product Size | 84mm*82mm*25mm (length*width*height) | |
| Weight | 133 g ± 5g | |
| Working temperature and humidity | -40 ~ +85℃、5%~95%RH(non-condensing) | |
| Storage temperature and humidity | -40 ~ +105℃.5%~ 95%RH(non-condensing) | |