The SLMT2-2 temperature and humidity data acquisition module is a low-cost integrated module that uses the MODBUS-RTU protocol and a specialized temperature and humidity sensor to achieve online monitoring of temperature and humidity status. This module is suitable for various applications, such as temperature and humidity data monitoring in the SMT industry, temperature and humidity data monitoring in electronic equipment factories, and temperature and humidity monitoring in cold storage warehouses.
The SLMT2-2 temperature and humidity data collection module is designed for industrial monitoring in SMT factories, electronics plants, cold storage, warehouses, GMP pharmaceutical environments, telecom server rooms, and other settings that require reliable temperature and humidity data. It uses the MODBUS‑RTU protocol and supports both RS485 and optional RS232 interfaces for easy integration with existing serial‑communication software.
Key features include a wide measurement range, selectable sensor accuracy, bus power operation, and flexible networking options such as RS485 bus topology (up to 255 nodes) or wireless extensions. The manual details technical parameters, interface pin definitions, communication commands, and typical wiring and application schemes. This manual is written in Chinese.
| Temperature measurement range | -40℃~+123.8℃ |
|---|---|
| Temperature accuracy (SHT10 sensor) | ±0.5℃ |
| Humidity measurement range | 0~100%RH |
| Humidity accuracy (SHT10 sensor) | ±4.5%RH |
| Baud rate | 9600 (customizable) |
| Communication port | RS485 (optional RS232) |
| Power supply | DC7V‑36V 1A bus powered |
| Operating temperature range | -40℃~+85℃ |
| Dimensions | 90×66×26 mm |
| Maximum RS485 nodes | 255 modules |
It uses the MODBUS‑RTU protocol and can communicate via RS485, with an optional RS232 interface.
Up to 255 modules can be linked together on the RS485 bus.
The default baud rate is 9600, but other rates can be customized.
It measures temperatures from –40 °C to +123.8 °C.