This document is the user manual of Chonghan CH-D1 wireless DTU. It mainly introduces the product's features, specifications, application areas, device connection, test instructions, etc.
The CH-D1 Wireless DTU is a modem used for transparent wireless data transmission of serial industrial devices. This manual explains the basic functions, installation, configuration, and common troubleshooting to help users quickly deploy the device.
It includes safety and hazard notices, a product list, AT command reference, TCP/UDP communication modes, baud‑rate settings, and a parts list with accessories such as power adapter, RS‑232 cable and antenna. This manual is written in Chinese.
| Frequency (GSM) | EGSM 900 MHz |
|---|---|
| Frequency (DCS) | DCS 1800 MHz |
| Frequency (CDMA) | CDMA 800 MHz |
| Power Supply | DC 12 V 1 A |
| Interface | RS‑232 (DB9) |
It must not be used in explosive areas, near medical or life‑support equipment, on aircraft, or near any device that could be interfered with by radio signals.
Refer to the section titled “修改波特率注意事项” for the procedure to modify the baud rate.
The package includes a DC 12 V 1 A power adapter, an RS‑232 straight‑through cable, and an antenna.