Technical data of CPU 31xC   
6.6 Technical data of the integrated I/O 
  CPU 31xC and CPU 31x, Technical Data 
6-46  Manual, 01/2006 Edition, A5E00105475-06 
Technical data 
  CPU 312C  CPU 313C  CPU 313C-2  CPU 314C-2 
Status, interrupts, diagnostics  CPU 312C  CPU 313C  CPU 313C-2  CPU 314C-2 
Status display  green LED per channel 
Interrupts 
•  Yes, if the corresponding channel is configured as interrupt input 
•  For using technological functions, please refer to the 
Technological 
Functions
 Manual. 
Diagnostics functions 
•  no diagnostics when operated as standard I/O 
•  For using technological functions, please refer to the 
Technological 
Functions
 Manual. 
Data for the selection of an encoder for 
standard DI 
CPU 312C  CPU 313C  CPU 313C-2  CPU 314C-2 
Input voltage   
•  Rated value 
DC 24 V 
•  For signal "1" 
15 V to 30 V 
•  For signal "0" 
-3 V to 5 V 
Input current   
•  For signal "1" 
Typically 9 mA 
Delay of standard inputs   
•  Configurable 
Yes (0.1 / 0.5 / 3 / 15 ms) 
 
You can reconfigure the input delay of the standard inputs during program 
runtime. Please note that your newly set filter time may only take effect 
after the previously set filter time has expired. 
•  Rated value 
3 ms 
For using technological functions:  
"Minimum pulse width/ minimum pause 
between pulses at maximum counting 
frequency"  
48 μs  16 μs  16 μs  8 μs 
Input characteristics curve  to IEC 1131, type 1 
Connection of 2wire BEROs  Possible 
•  Permitted quiescent current 
Max. 1,5 mA