Siemens Simatic S7-300 CPU 31xC Series User Manual

S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
4-1
Configuring
4
4.1 Overview
There, you can find all the necessary information
• for the mechanical configuration of an S7-300,
• for the electrical configuration of an S7-300,
• that has to be observed in networking.
Reference
• For further information, refer to the Communication with SIMATIC manual
(6ES7398-8EA00-8AA0), or
• the
SIMATIC NET Twisted-Pair and Fiber-Optic Networks Manual
(6GK1970-1BA10-0AA0)
4.2 Basic engineering principles
Important information for engineering
Warning
Open equipment
S7-300 modules are open equipment. That is, the S7-300 must be installed in a cubicle,
cabinet or electrical control room which can only be accessed using a key or tool. Only
trained or authorized personnel are allowed access to such cubicles, cabinets or electrical
operating rooms.

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)