Siemens Simatic S7-300 CPU 31xC Series User Manual

Configuring
4.11 Planning subnets
S7-300, CPU 31xC and CPU 31x: Installation
4-48 Operating Instructions, Edition 08/2004, A5E00105492-05
4.11.3.3 Integration of field bus systems in PROFINET
Field bus Integration
PROFINET allows you to integrate existing field bus systems (for example, PROFIBUS, ASI,
etc.) into PROFINET via proxy. This allows you to set up mixed systems consisting of field
bus and Ethernet based subsystems. This makes a continuous technological transition to
PROFINET possible.
Interconnection of PROFINET and PROFIBUS
You can connect PROFIBUS devices to the local PROFIBUS interface of a PROFINET
device. This allows you to integrate existing PROFIBUS configurations in PROFINET.
The following figure shows the supported network types for PROFINET:
• Industrial Ethernet and
• PROFIBUS.
1
2
3
Industrial Ethernet
PROFIBUS
Figure 4-3 PROFINET Devices, PROFIBUS Devices, and Proxy
Number Description
1 PROFINET devices
2 PROFINET device with proxy functionality (for more detailed information, see below)
3 PROFIBUS devices

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)