Siemens Simatic S7-300 CPU 31xC Series User Manual

Installation Order
S7-300, CPU 31xC and CPU 31x: Installation
2-2 Operating Instructions, Edition 08/2004, A5E00105492-05
Modifying the existing S7 system structure
To modify the configuration of an existing system, proceed as described earlier.
Note
When adding a new signal module, always refer to the relevant module information.
Reference
Also refer to the description of the various modules in the manual: SIMATIC S7-300
Automation Systems, Module Data Reference Manual
.

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)