This manual describes the RemoDAQ-8555A CDMA DTU module, covering its physical dimensions, functional features, and step‑by‑step installation procedures. It also details the wiring, power requirements, and environmental limits for reliable operation.
Key sections include module overview, hardware specifications, RS‑232/RS‑485 interface wiring, UIM card handling, and communication protocol examples. The document is intended for engineers integrating the DTU into industrial control, monitoring, or data acquisition systems. This manual is written in Chinese.
| Dimensions | 112.5 x 70 x 22 mm (excluding connectors) |
|---|---|
| Weight | ≈160 g |
| Supply Voltage | +12 V to +30 V DC |
| Standby Power Consumption | 30 mA @ +12 V DC |
| Active Power Consumption | 50 mA – 140 mA @ +12 V DC |
| Operating Temperature | -20 °C to +55 °C |
| Storage Temperature | -25 °C to +70 °C |
| Data Rate | 300 bps – 115200 bps |
| Communication Interfaces | RS‑232, RS‑485 |
| UIM Voltage | 3 V |
| Connector Type | 3.5 mm, 12‑pin removable terminal block |
The module consumes about 30 mA in standby when powered at +12 V DC.
The DTU supports both RS‑232 and RS‑485 serial interfaces.
The device operates from –20 °C up to +55 °C.