The Sensors Intra-Sewi KNX TH for the KNX building bus system measure the ambient temperature, capture the air humidity and calculate the dew-point. Via the bus, the indoor sensors can receive external values of temperature or humidity and process them further with their own data to a total value (mixed value, e.g. room average). All measurement values can be used for the control of limit-dependent switching outputs. States can be linked via AND logic gates and OR logic gates. In addition, an integrated actuating variable comparator can compare and output variables that were received via communication objects. An integrated PI-controller controls a heating/cooling (according to temperature), a second controller ventilation (humidification/dehumidification according to humidity). A warning can be output to the bus as soon as the comfort field, as per DIN 1946, is left.
Models:
N° EL-70669 Intra-Sewi KNX TH Built-in Type Temperature/Humidity (white)
N° EL-70666 Intra-Sewi KNX TH Built-in Type Temperature/Humidity (black)
Functions
- Measuring the temperature, with mixed value calculation. The share of internal measurement value and external value can be set as a percentage
- Threshold values can be adjusted per parameter or via communication objects
- PI-controller for heating (one or two-stage) and cooling (one or twostage) according to temperature. Regulation according to separate setpoints or basic setpoint temperature
- Measuring the air humidity (relative, absolute), with mixed value
calculation. The share of internal measurement value and external value can be set as a percentage
- Bus message, whether the values for temperature and air humidity are within the comfort field (DIN 1946)
- Dew point calculation
- PI controller for humidity according to humidity: Ventilate/Air (one-stage) or Ventilate (one or two-stage)
- 4 AND and 4 OR logic gates, each with 4 inputs. All switching events as well as 16 logic inputs (in the form of communications objects) can be used as inputs for the logic gates. The output of each gate can be configured optionally as 1-bit or 2 x 8-bit
- 2 actuation variable comparators to output minimum, maximum or
average values. 5 inputs each for values received via communication objects
Configuration is made using the KNX software ETS
Technical Data
| General: |
| Housing |
Plastic, glass |
| Colour |
• similar to pure white RAL 9010
• similar to jet black RAL 9005 |
| Assembly |
built-in, in false ceiling or connector socket |
| Dimensions Ø x height above wall |
approx. 80 mm x approx. 5 mm height in wall (installation) approx. 31 mm (incl. clamps) |
| Degree of protection |
IP 30 |
| Weight |
approx. 50 g |
| Ambient temperature |
-20…+60°C |
| Ambient humidity |
5...95% RH, non-condensing |
| Storage temperature |
-30…+70°C |
| KNX bus: |
| KNX medium |
TP1-256 |
| Configuration mode |
S-Mode |
| Group addresses |
max. 254 |
| Assignments |
max. 254 |
| Communication objects |
• Intra-Sewi KNX TH: 183
• Intra-Sewi KNX T: 129 |
| Nominal voltage KNX |
30 V DC SELV |
| Power consumption KNX |
max. 10 mA |
| Connection |
KNX plug terminals |
| Duration after bus voltage restoration until data is received |
approx. 5 seconds |
| Sensors: |
| Measurement range |
temperature-20°C … +60°C |
| Measurement range Hhmidity |
0% rH … 100% rH |
