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4 x AHT/AM to Modbus
4xAHT/AM is a 4-input I2C interface converter designed for reading four AHT20/AM2301B-type humidity and temperature sensors.
135.30
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4xAHT/AM is a 4-input I2C interface converter designed for reading four AHT20/AM2301B-type humidity and temperature sensors. It communicates via Modbus RTU to provide 4 humidity/temperature channels. LK devices can handle several such converters on the Modbus bus (3 or 5 depending on the version).
Technical Specifications
| Power Supply | 5 ÷ 12 V DC (connector) 5 V (USB) |
|---|---|
| I2C Bus Inputs | 4 |
| Interfaces | Modbus RTU (RS485), Serial (via USB; 115200 baud) |
| Dimensions | 74 x 40 x 30 mm (without DIN mount) |
| Weight | 44 g |
Default Configuration
Out of the box, 4xAHT/AM is preconfigured with:
- Modbus Slave ID: 1
- I2C bus speed: 20 kHz for all 4 inputs.
On the LK side, a configuration file must be added under Modbus/Custom for the readings to be visible.
Then, the required values should be mapped to Mx variables to make them accessible in the LK system.
More information about the device, its use, and Modbus configuration for LK4/LK3.5+ can be found on the website.
