Siemens SIMATIC S7-300 Module data Technical Data

Technical data of CPU 31xC
6.6 Technical data of the integrated I/O
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
6-35
Measurement principle
31xC CPUs use the measurement principle of actual value encoding. Here, they operate
with a sampling rate of 1 kHz. That is, a new value is available at the peripheral input word
register once every millisecond. This value can then be read via user program (e.g. L PEW).
The "previous" value is read again if access times are shorter than 1 ms.
Integrated hardware low-pass filter
An integrated low-pass filter attenuates analog input signals of channel 0 to 3. They are
attenuated according to the trend in the figure below.
Attenuation
<1%
Attenuation
<10%
strong
attenuation
100 %
Input frequency
Internal
signal level
400 Hz
63 %
200 Hz50 Hz
Inadmissible
input frequency
Figure 6-3 Low-pass characteristics of the integrated filter
Note
The maximum frequency of the input signal is 400 Hz.

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)