Sewi Modbus
Indoor Sensors
Wall/ceiling sensor with temperature and humidity measurement and dewpoint calculation. CO2 sensor optional
The indoor sensors Sewi AQS/TH Modbus and Sewi TH Modbus measure the indoor temperature and humidity and also calculate the dew point temperature. The Sewi AQS/TH also records the CO2 concentration.
The devices are 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)".
Models:
N° 30174 Sewi AQS/TH Modbus, CO2, temperature and humidity sensor
N° 30175 Sewi TH Modbus, temperature and humidity sensor
Sewi TH Modbus Indoor Sensor Functions:
- Temperature measurements
- Humidity measurements
- Calculating the dew point temperature
Sewi AQS/TH Modbus Indoor Sensor Functions:
- • Measuring the CO2concentration in the air
- Temperature measurements
- Humidity measurements
- Calculating the dew point temperature
Tips for Dew Point Calculation:
The sensors Sewi Modbus calculate the ambient dew point temperature. This value can be used for dew point monitoring. This would require another sensor for measuring the surface temperature of the wall or pipe. Also, the dew point needs to be monitored (compare with temperatures) in the Modbus master.
Monitoring predetermines the possible condensate build-up on the surface, giving a chance for timely countermeasures.
| General: | |
| 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 Stripping length |
Ø 0.4...0.8 mm s 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 / – |
Manufacturer:
Elsner Elektronik GmbH
Sohlengrund 16
75395 Ostelsheim
Germany
info@elsner-elektronik.de
Made in Germany
- Sensor in the housing for wall or ceiling mounting
- Data sheet with instrallation instruction (English, German, French, Italian or Spanish)
- Manual (German, English, French, Italian or Spanish) as download
Filter by language:
RTF
Item No.: 30174, 30175
Languages:
The indoor sensors Sewi AQS/TH Modbus and Sewi TH Modbus measure the indoor temperature and humidity and also calculate the dew point temperature. The Sewi AQS/TH also records the CO2 concentration.
The devices are 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)".
Models:
N° 30174 Sewi AQS/TH Modbus, CO2, temperature and humidity sensor
N° 30175 Sewi TH Modbus, temperature and humidity sensor
Sewi TH Modbus Indoor Sensor Functions:
- Temperature measurements
- Humidity measurements
- Calculating the dew point temperature
Sewi AQS/TH Modbus Indoor Sensor Functions:
- • Measuring the CO2concentration in the air
- Temperature measurements
- Humidity measurements
- Calculating the dew point temperature
Tips for Dew Point Calculation:
The sensors Sewi Modbus calculate the ambient dew point temperature. This value can be used for dew point monitoring. This would require another sensor for measuring the surface temperature of the wall or pipe. Also, the dew point needs to be monitored (compare with temperatures) in the Modbus master.
Monitoring predetermines the possible condensate build-up on the surface, giving a chance for timely countermeasures.
| General: | |
| 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 Stripping length |
Ø 0.4...0.8 mm s 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 / – |
Manufacturer:
Elsner Elektronik GmbH
Sohlengrund 16
75395 Ostelsheim
Germany
info@elsner-elektronik.de
Made in Germany
- Sensor in the housing for wall or ceiling mounting
- Data sheet with instrallation instruction (English, German, French, Italian or Spanish)
- Manual (German, English, French, Italian or Spanish) as download
Filter by language:
RTF
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages:
Item No.: 30174, 30175
Languages: