Siemens S7-300 appendix Mounting dimensions W x H x D mm 40 x 125 x Weight 270 g

Technical data of CPU 31x 7.2 CPU 312

Technical data

MPI
Services
•	PG/OP communication		Yes
•	Routing		No
•	Global data communication		Yes
•	S7 basic communication		Yes
•	S7 communication		Yes
	–	As server
	–	As client	No
•	Transmission rates		187.5 kbps
Programming
Programming language			LAD/FBD/STL
Available instructions			See the Instruction List
Nesting levels			8
System functions (SFCs)			See the Instruction List
System function blocks (SFBs)			See the Instruction List
User program security			Yes
Dimensions
Mounting dimensions W x H x D (mm)			40 x 125 x 130
Weight			270 g
Voltages and currents
Power supply (rated value)			24 VDC
•	Permitted range		20.4 V to 28.8 V
Current consumption (no-load operation)			Typically 60 mA
Inrush current			Typically 2.5 A
Power consumption (nominal value)			0,6 A
I2t			0.5 A2s
External fusing of power supply lines			min. 2 A
(recommended)
Power loss			Typically 2,5 W

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