Siemens SIMATIC S7-200 System Manual page 17

Siemens provides different S7-200 CPU models with a diversity of features and capabilities that
help you create effective solutions for your varied applications. Table 1-1 briefly compares some of
the features of the CPU. For detailed information about a specific CPU, see Appendix A.
Table 1-1 Comparison of the S7-200 CPU Models
Feature CPU 221
Physical size (mm) 90 x 80 x 62
Program memory:
with run mode edit 4096 bytes
without run mode edit 4096 bytes
Data memory 2048 bytes
Memory backup 50 hours
typical
Local on-board I/O
Digital 6 In/4 Out
Analog - -
Expansion modules 0 modules
High-speed counters
Single phase 4 at 30 kHz
Two phase 2 at 20 kHz
Pulse outputs (DC) 2 at 20 kHz
Analog adjustments 1
Real-time clock Cartridge
Communications ports 1
Floating-point math Yes
Digital I/O image size 256 (128 in, 128 out)
Boolean execution 0.22 microseconds/instruction
speed
1 You must calculate your power budget to determine how much power (or current) the S7-200 CPU can provide for your configuration. If the CPU
power budget is exceeded, you may not be able to connect the maximum number of modules. See Appendix A for CPU and expansion module
power requirements, and Appendix B to calculate your power budget.
CPU 222
90 x 80 x 62
4096 bytes
4096 bytes
2048 bytes
50 hours
typical
8 In/6 Out
- -
1
2 modules
4 at 30 kHz
2 at 20 kHz
2 at 20 kHz
1
Cartridge
RS- -485 1 RS- -485
Product Overview
CPU 224XP
CPU 224
CPU 224XPsi
120.5 x 80 x 62 140 x 80 x 62
8192 bytes 12288 bytes
12288 bytes 16384 bytes
8192 bytes 10240 bytes
100 hours 100 hours
typical typical
14 In/10 Out 14 In/10 Out
- - 2 In/1 Out
1
7 modules 7 modules
6 at 30 kHz 4 at 30 kHz
2 at 200 kHz
4 at 20 kHz 3 at 20 kHz
1 at 100 kHz
2 at 20 kHz 2 at 100 kHz
2 2
Built-in Built-in
1 RS- -485 2 RS- -485
Chapter 1
CPU 226
190 x 80 x 62
16384 bytes
24576 bytes
10240 bytes
100 hours
typical
24 In/16 Out
- -
1 1
7 modules
6 at 30 kHz
4 at 20 kHz
2 at 20 kHz
2
Built-in
2 RS- -485
3