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SIEMENS
Specific technical data on the CPUs
 

Features CPU 221 CPU 222 CPU 224 CPU 226
 

Integrated dig. inputs/outputs

 6 DI/4 DO 8 DI/6 DO 14 DI/10 DO 24 DI/16 DO

Digital inputs/outputs/max. number ofchannels with expansion modules

 - 40/38/78 94/82/168 128/120/248

Analog inputs/outputs/max. number ofchannels with expansion modules

 - 8/4/2010 28/14/35 28/14/35

Program memory

 4 KB 4 KB 8/12 KB 16/24 KB

Data memory

 2 KB 2 KB 8 KB 10 KB

Storage of dyn. Datavia high-performance capacitor

 typ. 50 h typ. 50 h typ. 100 h typ. 100 h

High-speed counters

 4 x 30 kHz,of which 2 x 20 kHzA/B counter usable 4 x 30 kHz,of which 2 x 20 kHzA/B counter usable 6 x 30 kHz,of which 4 x 20 kHzA/B counter usable 6 x 30 kHz,of which 4 x 20 kHzA/B counter usable

Communications interfaces RS 485

 1 1 1 2

Supported protocols:

                
– PPI master/slave yes yes yes yes
– MPI slave yes yes yes yes

– Freeport (freely config. ASCII protocol

 yes yes yes yes

Optional communications possibilities

 not expandable yes, PROFIBUS DP Slave yes, PROFIBUS DP Slave yes, PROFIBUS DP Slave
  and/or AS-Interface and/or AS-Interface and/or AS-Interface
  Master/Ethernet/ Master/Ethernet/ Master/Ethernet/
  Internet/Modem Internet/Modem Internet/Modem

Integrated 8-bit analog potentiometer(for commissioning, value change)

 1 1 2 2

Real-time clock

 optional optional yes yes

Integrated 24-V-DC sensor supply volt.

 max. 180 mA max. 180 mA max. 280 mA max. 400 mA

Removable terminal strip

 - - yes yes

Dimensions ( W x H x D in mm )

 90 x 80 x 62 90 x 80 x 62 120 x 80 x 62 196 x 80 x 62
                 

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