94BProduct overview
1.1 Introducing the S7-1200 PLC
S7-1200 Programmable controller
18
System Manual, 11/2011, A5E02486680-05
Table 1- 1
Comparing the CPU models
Feature
CPU 1211C
CPU 1212C
CPU 1214C
Physical size (mm)
90 x 100 x 75
90 x 100 x 75
110 x 100 x 75
Work
25 Kbytes
25 Kbytes
50 Kbytes
Load
1 Mbyte
1 Mbyte
2 Mbytes
User memory
Retentive
2 Kbytes
2 Kbytes
2 Kbytes
Digital
6 inputs/4 outputs
8 inputs/6 outputs
14 inputs/10 outputs
Local on-board I/O
Analog
2 inputs
2 inputs
2 inputs
Inputs (I)
1024 bytes
1024 bytes
1024 bytes
Process image
size
Outputs (Q)
1024 bytes
1024 bytes
1024 bytes
Bit memory (M)
4096 bytes
4096 bytes
8192 bytes
Signal module (SM) expansion
None
2
8
Signal board (SB) or communication
board (CB)
1
1
1
Communication module (CM)
(left-side expansion)
3
3
3
Total
3
4
6
Single phase
3 at 100 kHz
3 at 100 kHz
1 at 30 kHz
3 at 100 kHz
3 at 30 kHz
High-speed
counters
Quadrature phase 3 at 80 kHz
3 at 80 kHz
1 at 20 kHz
3 at 80 kHz
3 at 20 kHz
Pulse outputs
1
2
2
2
Memory card
SIMATIC Memory card (optional)
Real time clock retention time
10 days, typical / 6 day minimum at 40 degrees C
PROFINET
1 Ethernet communications port
Real math execution speed
18 μs/instruction
Boolean execution speed
0.1 μs/instruction
1
For CPU models with relay outputs, you must install a digital signal board (SB) to use the pulse outputs.
Each CPU provides dedicated HMI connections to support up to 3 HMI devices. The total
number of HMI is affected by the types of HMI panels in your configuration. For example,
you could have up to three SIMATIC Basic panels connected to your CPU, or you could
have up to two SIMATIC Comfort panels with one additional Basic panel.
The different CPU models provide a diversity of features and capabilities that help you create
effective solutions for your varied applications. For detailed information about a specific
CPU, see the technical specifications (Page 657).
