CH-D1G2S3 GPRS DTU from Chonghan Technology is a dual-frequency wireless DTU specifically designed for low data rate communication such as GPRS. It features a rugged metal casing, standard data serial interface, and SIM card slot. As a standalone plug-and-play device, it provides standard universal power interface, antenna interface, and data interface. This product is ideal for M2M applications with low data transmission requirements and can be widely used in various commercial applications such as meter reading, remote equipment maintenance, transportation logistics, traffic systems, vending machines, security, and property management.
The CH-D1G2S3 GPRS DTU is a compact, metal‑cased device that offers reliable GPRS communication for low‑data‑rate M2M applications. It includes standard interfaces such as RS‑232, RS‑485, TTL and a SIM card holder, making it suitable for a wide range of industrial uses.
Typical application areas include city utility automation, oil‑field monitoring, security systems, POS/ATM devices, and transportation control. The datasheet lists performance parameters, environmental limits, and the contents of the standard package. This manual is written in Chinese.
| Frequency Bands | EGSM 900 MHz / DCS 1800 MHz |
|---|---|
| Output Power | Class 4 (2 W) @ EGSM900, Class 1 (1 W) @ GSM1800 |
| Operating Voltage | DC 5‑25 V |
| Temperature Range | Normal: –20 °C to +55 °C; Restricted: –40 °C to +70 °C |
| Dimensions | 75 mm × 50/72 mm × 16 mm |
| Weight | 200 g |
| GPRS Downlink Speed | 85.6 kbps |
| Antenna Connector | 500 Ω SMA female |
| Serial Port | V24 / V.28 on 9‑terminal sub‑D socket |
| Data Interface | RS‑232 / RS‑485 / TTL |
Normal operation is from –20 °C to +55 °C, while restricted operation is allowed from –40 °C to +70 °C.
The unit measures 75 mm × 50/72 mm × 16 mm and weighs about 200 g.
It provides a V24/V.28 serial port, RS‑232, RS‑485, and TTL data interfaces.
The DTU can achieve a downlink speed of up to 85.6 kbps.