CH-D1G2S2 GPRS DTU is a dual-band wireless DTU designed for low data rate communications such as GPRS. As an industrial-grade wireless DTU, it provides a rugged metal shell design, standard serial data interface and SIM card slot. As an independent plug-and-play device, it provides standard general power interface, antenna interface, data interface. Considering that it is a special GPRS industrial-grade communication device with a rugged shell, CH-D1G2S2 GPRS DTU is the ideal choice for M2M applications with low data rate transmission. It can be widely used in commercial fields such as meter reading, remote equipment maintenance, transportation logistics, transportation systems, vending machines, security and property management.
The CH-D1G2S2 GPRS DTU is an industrial‑grade dual‑band (EGSM 900 MHz / DCS 1800 MHz) wireless modem designed for low‑data‑rate M2M applications such as remote meter reading, logistics, and security monitoring. It features a rugged metal enclosure, standard power, antenna, and serial interfaces, and operates with a SIM card for GPRS connectivity.
Key specifications include dual‑band GSM support, up to 2 W output power, RS‑232/RS‑485/TTL data ports, a 5 V‑25 V supply range, and operating temperatures from –20 °C to +55 °C (normal) and –25 °C to +70 °C (restricted). The device is supplied with a DB9 serial cable, power adapter, antenna, and documentation, and carries a one‑year warranty. This manual is written in Chinese.
| Frequency Bands | Dual‑Band EGSM 900 MHz / DCS 1800 MHz |
|---|---|
| Output Power | Class 4 (2 W) @ EGSM900, Class 1 (1 W) @ GSM1800 |
| Supply Voltage | DC5 V ~ 25 V |
| Operating Temperature (Normal) | -20 °C to +55 °C |
| Operating Temperature (Restricted) | -25 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Dimensions | 75 mm × 50 mm × 72 mm (fixed hole 16 mm) |
| Weight | 200 g |
| GPRS Downlink Speed | 85.6 kbps |
| GPRS Uplink Speed | 42.8 kbps |
| Antenna Connector | SMA female (5007) |
| SIM Card Holder | Mini‑SIM, 1.8 V/3.3 V |
| Serial Port Interface | 9‑pin sub‑D socket, RS‑232 / RS‑485 / TTL |
| Data Interface | RS‑232, RS‑485, TTL |
Normal operation is from –20 °C to +55 °C, while restricted operation covers –25 °C to +70 °C.
The package contains the CH‑D1G2S2 GPRS DTU, a DB9 serial cable, a 9 V 1 A power adapter, an antenna, and a CD‑ROM with product documentation.
The device is covered by a one‑year warranty.