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- Last added
- 2026-09-28
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Top-Iot TD211-DC User Manual V3.0
The TD211-DC is an industrial‑grade IoT DTU that converts serial data to IP and vice‑versa over 4G networks. It supports RS232 and RS485 interfaces, optional TTL levels, and is designed for applications such as smart power, oil‑field monitoring, and logistics.
The manual covers safety precautions, hardware installation, power requirements, antenna and SIM card setup, as well as detailed configuration of serial ports and SMS parameters. Appendices list AT commands and common troubleshooting steps. This manual is written in Chinese.
Covers: Terminology and Definitions · Product Introduction · Installation Instructions · Serial Port Configuration Parameters · SMS Configuration Parameters · Appendix: AT Commands
Latest Top-Iot manuals
Top-Iot TD211-DC User Manual V3.0
User Manual 20 pages · 1.1 MB · ZHThe Top-Iot TD211-DC User Manual provides installation, configuration, and troubleshooting instructions for the industrial IoT DTU.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in Top-Iot manuals
Why is the Power LED not lit?
Check that the DTU is supplied with a voltage between 5 V and 35 V and that the polarity is correct.