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ACE-THL-MB: IP65 Modbus Light, Temperature, Humidity Sensor connected to HMI
If you are looking for a light, temperature and humidity sensor to connect to our HMI… Take a look at our ACE-THL-MB
HMI project
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Basic HMI project for read the sensor values via the Modbus protocole over RS485 Download here
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IP65, Slave Modbus RS485 Light + Temperature + Humidity Sensor  Size of the plastic case: 90 x 58 x 35 mm |
RS485 and power supply wiring
| Sensor Wire Colour | Sensor Description | Sub-D9 HMI RS485 |
| Red / Brown | Power + 12-24 VDC | |
| Green / Black | Power – GND | |
| Yellow | RS485 A+ | Pin 9 |
| Blue | RS485 B- | Pin 8 |
RS485 communication parameters
Default 9600 bds, 8 bits, none, 1 stop
Registers for reading light/brightness, temperature and humidity data
ACE-THL-MB Version 1 (with Red and Green wires)
| Modbus Register If start from 0 |
Modbus Register If start from 1 (*) |
Description | Data type | |
| 4×0 | 4×1 |
Luminosity/Light (Lux) |
Read only 16 bits unsigned | 0 to 65535 |
| 4×1 | 4×2 |
Temperature (°C *100) |
Read only 16 bits signed | -4000 to +12300 |
| 4×2 | 4×3 |
Humidity (% *100) |
Read only 16 bits unsigned | 0 to 10000 |
| 4×102 | 4×103 | Modbus Slave ID / Device address | Read / Write 16 bits signed | Default 1 |
| 4×103 | 4×104 | Baud rate (1=2400,2=4800,3=9600) | Read / Write 16 bits signed | Default 3 = 9600 bds |
ACE-THL-MB Version 2 (with Brown and Black wires)
| Modbus Register If start from 0 |
Modbus Register If start from 1 (*) |
Description | Data type | |
| 4×0 | 4×1 |
Humidity (% *100) |
Read only 16 bits unsigned | 0 to 65535 |
| 4×1 | 4×2 |
Temperature (°C *100) |
Read only 16 bits signed | -4000 to +12300 |
| 4×2 | 4×3 |
Luminosity/Light (Lux) |
Read only 16 bits unsigned | 0 to 10000 |
| 4×2000 | 4×2001 | Modbus Slave ID / Device address | Read / Write 16 bits signed | Default 1 |
| 4×2001 | 4×2002 | Baud rate (0=2400,1=4800,2=9600) | Read / Write 16 bits signed | Default 3 = 9600 bds |
(*) Addresses always start with 0 for the Modbus RTU protocol, but for technical reasons some controllers start with 1
Read with Modbus-Doctor Software
For ACE-THL-MB version 1
- Modbus-Doctor is connected to a USB to RS485 converter
- The light, temperature and humidity sensor is supplied with 12 or 24 VDC and connected to terminals A+ and B- of the USB to RS485 converter
