CPUs
1-39
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
MPI
Services
– PD/OP
communication
Yes
– Global data
communication
Yes
– S7 basic
communication
Yes
– S7 communication Yes (server)
Transmission rates 19.2; 187.5 Kbps
Dimensions
Assembly dimension
BHT (mm)
80125130
Weight Approx. 0.53 kg
Programming
Programming language STEP 7
Stored instructions See Instruction List
Nesting levels 8
System functions (SFCs) See Instruction List
System function blocks
(SFBs)
See Instruction List
User program security Password protection
Voltages, Currents
Power supply 24V DC
Permissible range 20.4 to 28.8
Current consumption (idle) typical 0.7 A
Inrush current typical 8A
l
2
t 0.4 A
2
s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A
Type B or C
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses typical 8 W
Battery
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Accumulator No