Installation Instructions
TECHNICAL MANUAL GS 4x.10 KNX – ENGLISH 
5 
Communication objects 
Number 
Name 
Object function 
C 
R 
W 
T 
U 
Objekt size 
Data type 
1  Send ‘0’ in operation  output  C  -  -  T  -  1 Bit  Boolean 
1  Send ‘1’ in operation  output  C  -  -  T  -  1 Bit  Boolean 
2  Request status  input  C  -  W  -  -  1 Bit  switching 
3  CO2: CO2 value [ppm]  output  C  -  -  T  -  2 Bytes  float value, pieces/million (ppm) 
4  CO2: CO2 value external [ppm]  input  C  -  W  -  -  2 Bytes  float value, pieces/million (ppm) 
5  CO2: request CO2 value  input  C  -  W  -  -  1 Bit  trigger 
6  CO2: sensor error   output  C  -  -  T  -  1 Bit  Boolean 
7  CO2R: Control value (0...255)  output  C  -  -  T  -  1 Byte  counter pulses (0...255) 
7  CO2R: Control value (0...100%)  output  C  -  -  T  -  1 Byte  percent (0...100%) 
7  CO2R: Scene (1…64)  output  C  -  -  T  -  1 Byte  Scenen Nummer 
8 
CO2R: Control value level 1 (switching object) 
output 
C 
- 
- 
T 
- 
1 Bit 
switching 
8  CO2R: Control value level 1 (priority)  output  C  -  -  T  -  2 Bit  priority switching 
9  CO2R: Control value level 2 (switching object)  output  C  -  -  T  -  1 Bit  switching 
9 
CO2R: Control value level 2 (priority) 
output 
C 
- 
- 
T 
- 
2 Bit 
priority switching 
10  CO2R: Control value level 3 (switching object)  output  C  -  -  T  -  1 Bit  switching 
10  CO2R: Control value level 3 (priority)  output  C  -  -  T  -  2 Bit  priority switching 
11  CO2R: Base set point [ppm]  input  C  -  W  -  -  2 Bytes  float value, pieces/million (ppm) 
12  CO2R: Blocking object threshold 1  input  C  -  W  -  -  1 Bit  enable 
13  CO2R: Blocking object threshold 2  input  C  -  W  -  -  1 Bit  enable 
14  CO2R: Blocking object threshold 3  input  C  -  W  -  -  1 Bit  enable 
15  CO2R: Blocking object  input  C  -  W  -  -  1 Bit  enable 
15  CO2R: Blocking object  input  C  -  W  -  -  1 Bit  enable 
16  rF: Humidity value [%]  output  C  -  -  T  -  2 Bytes  humidity (%) 
17  rF: Humidity value (1 Byte) [%]  output  C  -  -  T  -  1 Byte  percent (0...100%) 
18  rF: Humidity value external [%]  input  C  -  W  -  -  2 Bytes  humidity (%) 
19  rF: Request humidity value  input  C  -  W  -  -  1 Bit  trigger 
20  rF: Sensor error  output  C  -  -  T  -  1 Bit  Boolean 
21  RFR: Control value (0...255)  output  C  -  -  T  -  1 Byte  counter pulses (0...255) 
21  RFR: Control value (0...100%)  output  C  -  -  T  -  1 Byte  percent (0...100%) 
21  RFR: Scene (1…64)  output  C  -  -  T  -  1 Byte  Scenen Nummer 
22 
RFR: Control value level 1 (switching object) 
output 
C 
- 
- 
T 
- 
1 Bit 
switching 
22  RFR: Control value level 1 (priority)  output  C  -  -  T  -  2 Bit  priority switching 
23  RFR: Control value level 2 (switching object)  output  C  -  -  T  -  1 Bit  switching 
23 
RFR: Control value level 2 (priority) 
output 
C 
- 
- 
T 
- 
2 Bit 
priority switching 










