CH-D1G2S3 GPRS DTU is a dual-band wireless DTU specially designed for low data communications such as GPRS. As an industrial wireless DTU, it provides a rugged metal shell design, a standard serial data interface and a SIM card slot. As an independent plug-and-play device, it provides standard general power interfaces, antenna interfaces and data interfaces. Considering that it is a special GPRS industrial-grade communication device with a rugged shell, CH-D1G2S3 GPRS DTU is an ideal choice for M2M applications with low data transmission. It can be widely used in business areas: meter reading, remote equipment maintenance, transportation and logistics, transportation systems, vending machines, security and property management.
The CH-D1G2S3 GPRS DTU is a dual‑band wireless device designed for low‑data‑rate GPRS communication in industrial applications. It features a rugged metal enclosure, standard serial interfaces (RS‑232/RS‑485/TTL), a SIM card slot, and supports transparent data transmission, real‑time online monitoring, remote activation and reset.
Key specifications include dual‑band EGSM 900 MHz/DCS 1800 MHz operation, output power up to 2 W, a wide supply voltage range (DC 5‑25 V), and environmental ratings from –40 °C to +85 °C. The module provides GPRS speeds of up to 85.6 kbps downlink and 42.8 kbps uplink, and is supplied with a DB9 serial cable, power adapter, antenna, and documentation. This manual is written in Chinese.
| Frequency Bands | EGSM 900 MHz / DCS 1800 MHz |
|---|---|
| Output Power | Class 4 (2 W) @ EGSM900 |
| Supply Voltage | DC 5 V – 25 V |
| Operating Temperature | Normal: –20 °C to +55 °C |
| Restricted Temperature | –40 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C |
| Dimensions | 75 mm × 50/72 mm × 16 mm |
| Weight | 200 g |
| GPRS Downlink Speed | 85.6 kbps |
| GPRS Uplink Speed | 42.8 kbps |
| SIM Card Type | Mini‑SIM, 1.8 V/3.3 V |
| Serial Interfaces | RS‑232 / RS‑485 / TTL |
| Antenna Connector | 50 Ω SMA female |
| Power Supply Connector | Φ5.5 mm / 2.5 mm |
It offers RS‑232, RS‑485 and TTL level serial ports, a 50 Ω SMA female antenna connector, and a DC5‑25 V power input.
Normal operation is from –20 °C to +55 °C, restricted operation from –40 °C to +70 °C, and it can be stored between –40 °C and +85 °C.
The module provides a downlink speed up to 85.6 kbps and an uplink speed up to 42.8 kbps.
The package contains the CH‑D1G2S3 DTU, a DB9 serial cable, a 9 V 1 A power adapter, an antenna, and a CD‑ROM with documentation.