Top-Iot TD211-DC User Manual V3.0

The Top-Iot TD211-DC User Manual provides installation, configuration, and troubleshooting instructions for the industrial IoT DTU.

Top-Iot TD211-DC User Manual V3.0 - cover page
Brand
Top-Iot
Document type
User Manual
Language
Chinese
Pages
20
File format
PDF
File size
1.1 MB
Published
28 September, 2026
Updated
28 September, 2026
MD5 checksum
13A00A0FB9B032846641544BFA602B47
PDF
Top-Iot TD211-DC User Manual V3.0 PDF

About this manual

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.

What's inside

  • Terminology and Definitions
  • Product Introduction
  • Installation Instructions
  • Serial Port Configuration Parameters
  • SMS Configuration Parameters
  • Appendix: AT Commands
  • Appendix: FAQ

Specifications

Power Supply Voltage Range5~35V DC
Interface OptionsRS232, RS485, optional TTL
Indicator LEDsOnline, ACT, Power, System

Frequently asked questions

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.

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