Siemens S7-300 appendix Technical data Functionality, 2nd interface

Technical data of CPU 31x 7.4 CPU 315-2 DP

Technical data

Functionality
•	MPI		Yes
•	PROFIBUS DP		No
•	Point-to-point communication		No
MPI
Services
•	PG/OP communication		Yes
•	Routing		Yes
•	Global data communication		Yes
•	S7 basic communication		Yes
•	S7 communication		Yes
	–	As server	Yes
	–	As client	No (but via CP and loadable FBs)
•	Transmission rates		187.5 kbps
2nd interface
Type of interface			Integrated RS485 interface
Physics			RS 485
electrically isolated			Yes
Type of interface			Integrated RS485 interface
Interface power supply (15 to 30 VDC)			max. 200 mA
Functionality
MPI			No
PROFIBUS DP			Yes
Point-to-point communication			No
DP master
Services
•	PG/OP communication		Yes
•	Routing		Yes
•	Global data communication		No
•	S7 basic communication		No
•	S7 communication		No
• Constant bus cycle time			Yes
•	SYNC/FREEZE		Yes
•	DPV1		Yes
Transmission speed			Up to 12 Mbps
Number of DP slaves per station			124
Address area			max. 244 bytes

CPU 31xC and CPU 31x, Technical data	7-17
Manual, Edition 08/2004, A5E00105475-05