Siemens SIMATIC S7-300 Module data Technical Data Manual

Technical data of CPU 31xC
6.6 Technical data of the integrated I/O
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
6-35
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.
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Figure 6-3 Low-pass characteristics of the integrated filter
Note
The maximum frequency of the input signal is 400 Hz.
Input filters (software filter)
The current / voltage inputs have a software filter for the input signals which can be
programmed with STEP 7. It filters the configured interference frequency (50/60 Hz) and
multiples thereof.
The selected interference suppression also determines the integration time.
At an interference suppression of 50 Hz the software filter forms the average based on the
last 20 measurements and saves the result as a measurement value.
You can suppress interference frequencies (50 Hz or 60 Hz) according to the parameters set
in STEP 7. A setting of 400 Hz will not suppress interference.
An integrated low-pass filter attenuates analog input signals of channel 0 to 3.

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)