The CH-D1G2S3 is a rugged GPRS DTU designed for low‑data‑rate M2M communication. It offers a metal enclosure, standard data interfaces, and a SIM card holder for reliable remote monitoring in various industries such as utilities, transportation, finance, and public safety.
The datasheet lists detailed electrical, mechanical, and performance specifications, including frequency bands, power output, temperature ranges, and connector types, as well as the items included in the standard package. This manual is written in Chinese.
| Frequency Bands | Dual‑Band EGSM 900 MHz / DCS 1800 MHz |
|---|---|
| Output Power (EGSM900) | Class 4 (2 W) |
| Output Power (GSM1800) | Class 1 (1 W) |
| Supply Voltage | DC 5‑25 V |
| Normal Operating Temperature | -20 °C to +55 °C |
| Restricted Operating Temperature | -40 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity Range | 10 %–90 % RH |
| Dimensions | 75 mm × 50/72 mm × 16 mm |
| Weight | 200 g |
| GPRS Multi‑Slot Class | Class 10 |
| Downlink Speed | 85.6 kbps |
| Uplink Speed | 42.8 kbps |
| Antenna Connector | 500 Ω SMA Female |
| Power Supply Connector | 5.5 mm / 2.5 mm |
| SIM Card Holder | Mini‑SIM, 1.8/3.3 V |
| Serial Port | V24 / V.28 on 9‑terminal sub‑D socket |
| Data Interface | RS‑232 / RS‑485 / TTL |
The device measures 75 mm × 50/72 mm × 16 mm and weighs about 200 g.
The package contains the GPRS DTU, a DB9 serial cable, a 9 V 1 A power adapter, and an antenna.