Siemens SIMATIC S7-300 Module data Technical Data Manual

CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
4-1
Memory concept
4
4.1 4.1 Memory areas and retentivity
4.1.1 CPU memory areas
The three memory areas of your CPU:
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Load memory
The load memory is located on the SIMATIC Micro Memory Card (MMC). The size of the
load memory corresponds exactly to the size of the SIMATIC Micro Memory Card. It is used
to store code blocks, data blocks and system data (configuration, connections, module
parameters, etc.). Blocks that are identified as non runtime-related are stored exclusively in
load memory. You can also store all the configuration data for your project on the SIMATIC
Micro Memory Card.
Note
User programs can only be downloaded and thus the CPU can only be used if the SIMATIC
Micro Memory Card is inserted in the CPU.

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)