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Siemens  Standard application AHU  CE1P3977en_02 
Building Technologies  Appendices  01.02.2010 
20.2  Diagnostic tables for check I/O 
 
The clear text from the following tables cannot be configured, but is required for a 
function as well as determining if inputs or outputs are occupied in duplicate. 
1rst notconf IO Pos = 82 => Input external control 2 is not assigned an input 
(Nusd). 
Caution: The plant is locked against switch on! 
Doubled config I/O = Yes 
Doubled config I/Os = 82    81 
Doubled conf I/O pos = DI3 
Inputs External contrl 1 and 2 were assigned the same output DI3. 
Caution: The plant is locked against switch on! 
 
Name  Type  Position 
(IO 
Check) 
 
Name  Type  Position 
(IO 
Check) 
Temperature supply  AI  1    Temperature Aux   AI  12 
Temperature room 1  AI  2    Pressure supply  AI  21 
Temperature rum 2  AI  3    Pressure return  AI  22 
Temperature return  AI  4    Flow supply  AI  23 
Temperature out  AI  5    Flow return  AI  24 
Temperature frost  AI  6    Pressure over recovery  AI  25 
Temperature water recovery  AI  7    Humidity supply  AI  31 
Temperature exhaust   AI  8    Humidity room  AI  32 
Temperature supply after recovery  AI  9    Humidity out  AI  33 
Temperature supply Extra seq.  AI  10    Air quality  AI  35 
Temperature frost Extra heat  AI  11    External setpoint  AI  36 
 
Example 1 
Example 2 
Analog inputs 
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 232