Sewi AQS/TH Modbus, CO2, temperature and humidity sensor
Description
The indoor sensor Sewi AQS/TH Modbus measures the indoor temperature and humidity and also calculate the dew point temperature. The Sewi AQS/TH also records the CO2 concentration.
The device is a Modbus servers with a RS485 interface and a RTU protocol. The Modbus client, such as PC, SPS or MC can read the Sewi Modbus Indoor Sensors measurement values with "Function 04h (Read Input Register)"
Technical Details
Specification
Casing: Plastic
Colour (similar): RAL 9003 / RAL 9002 (white)
Size (Ø × H): 105mm × 32mm
Degree of protection: IP30
Total weight: ≈ 100 g / ≈ 75 g
Ambient temperature: 0…+45°C
Ambient humidity (RH) (non-condensing): 0...95%
Storage temperature: -20...+70°C
Overvoltage category: III
Pollution degree: 2
Supply:
Voltage (Power supply unit must comply with EN 61558-1): 24V DC SELV ±10%
Power consumption: ≤ 15mA
Modbus:
Interface with "-" of the power supply as reference potential: RS485 (SELV)
Protocol: RTU
RS485 bus load 1/8 unit load according to RS485 standard
RS485 driver performance min. 2.4 V at 54 Ohm bus load (corresponds to 32 standard RS485 unit loads)
Connection of supply and Modbus:
Push-in spring terminal
Conductor diameter, solid: Ø 0.4...0.8 mm s
Stripping length: 6.5mm
Sensors:
Temperature measurement range: 0…+50 °C / -5…+60 °C
Humidity measurement range (rH): 0...90 % / 0...100 %
CO_{2} measurement range: 100...5000 ppm / –
Properties
Properties
| Technology | KNX |
| Brand | ELSNER |
| Colour/Material | White |
