Siemens SIMATIC S7-300 Series Reference Manual page 78

CPUs
MPI
S
Services
– PD/OP Yes
communication
– Global data Yes
communication
– S7 basic Yes
communication
– S7 communication Yes (server)
S
Transmission rates 19.2; 187.5 Kbps
Dimensions
Assembly dimension 80 125 130
B H T (mm)
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 See Instruction List
(SFBs)
User program security Password protection
1-62
Voltages, Currents
Power supply
S
Permissible range
Current consumption (idle)
Inrush current
2
l t
External fusing for supply
lines (recommendation)
PD supply at MPI (15 to
30V DC)
Power losses
Battery
S
Backup margin at 25_
C and continuous CPU
buffering
S
Battery shelf life at
25_C
Accumulator
– at 0 to 25_C
– at 40_ C
at 60 _ C
–
S
Battery charging time
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
24V DC
20.4 to 28.8 V
typical 7.0 A
typical 8A
2
0.4 A s
Circuit breaker; 2 A
Type B or C
max. 200 mA
typical 8 W
Yes
min. 1 year
approx. 5 years
Yes
Approx. 4 weeks
Approx. 3 weeks
Approx. 1 week
Approx. 1 hour
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