User manual for the LXI680G industrial GPRS DTU with GPS positioning and RS‑232 interface.
The LXI680G is an industrial‑grade GPRS data‑transmission unit with built‑in GPS. It runs on an ARM platform, supports a wide power range and operates from –40 °C to +85 °C. The device provides a standard RS‑232 serial port for easy connection to PLCs, industrial PCs, instruments, RTUs and other equipment, and can transmit data and GPS location to a remote server over GPRS.
The manual covers product overview, specifications, mechanical dimensions, networking options, installation steps (antenna, SIM card, power), terminal signal definitions, system connection, configuration commands, SMS configuration, and example applications for remote monitoring and data communication. This manual is written in Chinese.
| Network Type | GPRS |
|---|---|
| Frequency Bands | GSM 850/900/1800/1900 MHz |
| Downlink Max Speed | 85.6 kbps |
| Uplink Max Speed | 42.8 kbps |
| Serial Interface | RS‑232 (RS‑232 standard levels) |
| Power Supply | DC +6 V ~ +36 V |
| Maximum Power Consumption | 380 mA |
| Operating Temperature | -25 °C ~ +70 °C |
The device uses a 50 Ω SMA female connector for the antenna.
Remove the SIM card drawer, place the SIM card with the gold contacts facing outward, and reinsert the drawer; do not insert or remove the SIM while the device is powered.
The LXI680G can be powered from +6 V to +36 V DC.
SMS commands start with the DTU login password, use commas to separate command and parameters, and follow the same format as local AT commands.