CPU 221

	6ES7 211-0AA23-0XB0	6ES7 211-0BA23-0XB0
Supply voltages
Rated value
24 V DC	Yes
permissible range, lower limit (DC)	20.4 V
permissible range, upper limit (DC)	28.8 V
120 V AC		Yes
230 V AC		Yes
permissible range, lower limit (AC)		85 V
permissible range, upper limit (AC)		264 V
permissible frequency range, lower limit		47 Hz
permissible frequency range, upper limit		63 Hz
Load voltage L+
Rated value (DC)	24 V	24 V
permissible range, lower limit (DC)	20.4 V	5 V
permissible range, upper limit (DC)	28.8 V	30 V
Load voltage L1
Rated value (AC)		100 V; 100 to 230 V AC
permissible range, lower limit (AC)		5 V
permissible range, upper limit (AC)		250 V
permissible frequency range, lower limit		47 Hz
permissible frequency range, upper limit		63 Hz
Current consumption
Inrush current, max.	10 A; at 28.8 V	20 A; at 264 V
from supply voltage L+, max.	450 mA; 80 to 450 mA
from supply voltage L1, max.		120 mA; 15 to 60 mA (240 V); 30 to 120 mA (120 V); output current for expansion modules (5 V DC) 340 mA
Backup battery
Battery operation
Backup time, max.	50 h; (min. 8 h at 40 °C); 200 days (typ.) with optional battery module	50 h; (min. 8 h at 40 °C); 200 days (typ.) with optional battery module
Memory
Number of memory modules (optional)	1; pluggable memory module, content identical with integral EEPROM; can additionally store recipes, data logs and other files	1; pluggable memory module, content identical with integral EEPROM; can additionally store recipes, data logs and other files
Data and program memory
Data memory, max.	2 Kibyte	2 Kibyte
Program memory, max.	4 Kibyte	4 Kibyte
Backup
present	Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenance-free on integral EEPROM, current values of DB 1 in RAM, retentive memory bits, timers, counters, etc. maintenance-free via high-performance capacitor; optional battery for long-term buffering	Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenance-free on integral EEPROM, current values of DB 1 in RAM, retentive memory bits, timers, counters, etc. maintenance-free via high-performance capacitor; optional battery for long-term buffering
CPU processing times
for bit operations, max.	0.22 µs	0.22 µs
Counters, timers and their retentivity
S7 counter
Number	256	256
of which retentive with battery
can be set	Yes; via high-performance capacitor or battery	Yes; via high-performance capacitor or battery
lower limit	1	1
upper limit	256	256
Counting range
lower limit	0	0
upper limit	32 767	32 767
S7 times
Number	256	256
of which retentive with battery
can be set	Yes; via high-performance capacitor or battery	Yes; via high-performance capacitor or battery
upper limit	64	64
Time range
lower limit	1 ms	1 ms
upper limit	54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to 54 min	54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to 54 min
Data areas and their retentivity
Flag
Number, max.	32 byte	32 byte
Retentivity available	Yes; M 0.0 to M 31.7	Yes; M 0.0 to M 31.7
of which retentive with battery	0 to 255, via high-performance capacitor or battery, adjustable	0 to 255, via high-performance capacitor or battery, adjustable
of which retentive without battery	0 to 112 in EEPROM, adjustable	0 to 112 in EEPROM, adjustable
Hardware configuration
Connectable programming devices/PCs	SIMATIC PG/PC, standard PC	SIMATIC PG/PC, standard PC
Connection method
Plug-in I/O terminals	No	No
1st interface
Type of interface	Integrated RS 485 interface	Integrated RS 485 interface
Physics	RS 485	RS 485
Functionality
MPI	Yes; as MPI slave for data exchange with MPI masters (S7-300/S7-400 CPUs, OPs, TDs, Push Button Panels); S7-200-internal CPU/CPU communications is possible in the MPI network with restrictions; transmission rates: 19.2 / 187.5 kbit/s	Yes; as MPI slave for data exchange with MPI masters (S7-300/S7-400 CPUs, OPs, TDs, Push Button Panels); S7-200-internal CPU/CPU communications is possible in the MPI network with restrictions; transmission rates: 19.2 / 187.5 kbit/s
PPI	Yes; with PPI protocol for programming functions, HMI functions (TD 200, OP), S7-200-internal CPU/CPU communications; transmission rates 9.6 / 19.2 / 187.5 kbit/s	Yes; with PPI protocol for programming functions, HMI functions (TD 200, OP), S7-200-internal CPU/CPU communications; transmission rates 9.6 / 19.2 / 187.5 kbit/s
Serial data exchange	Yes; as freely programmable interface with interrupt facility for serial data exchange with third-party devices with ASCII protocol transfer rates: 1.2 / 2.4 / 4.8 / 9.6 / 19.2 / 38.4 / 57.6 / 115.2 kbit/s; the PC / PPI cable can also be used as RS232 / RS485 converter	Yes; as freely programmable interface with interrupt facility for serial data exchange with third-party devices with ASCII protocol transfer rates: 1.2 / 2.4 / 4.8 / 9.6 / 19.2 / 38.4 / 57.6 / 115.2 kbit/s; the PC / PPI cable can also be used as RS232 / RS485 converter
MPI
Transmission rate, max.	187.5 kbit/s	187.5 kbit/s
Transmission speeds, min.	19.2 kbit/s	19.2 kbit/s
CPU/ programming
Programming language
LAD	Yes	Yes
FBD	Yes	Yes
STL	Yes	Yes
Command set	Bit logic instructions, compare instructions, timer instructions, counter instructions, clock instructions, transmissions instructions, table instructions, logic instructions, shift and rotate instructions, conversion instructions, program control instructions, interrupt and communications instructions, logic stack instructions, integer maths, floating-point math instructions, numerical functions	Bit logic instructions, compare instructions, timer instructions, counter instructions, clock instructions, transmissions instructions, table instructions, logic instructions, shift and rotate instructions, conversion instructions, program control instructions, interrupt and communications instructions, logic stack instructions, integer maths, floating-point math instructions, numerical functions
Program processing	free cycle (OB 1), interrupt-controller, time-controlled (1 to 255 ms)	free cycle (OB 1), interrupt-controller, time-controlled (1 to 255 ms)
Program organization	1 OB, 1 DB, 1 SDB subroutines with/without parameter transfer	1 OB, 1 DB, 1 SDB subroutines with/without parameter transfer
Number of subroutines, max.	64	64
User program protection/password protection	Yes; 3-stage password protection	Yes; 3-stage password protection
Digital inputs
Number of digital inputs	6; Integrated	6; Integrated
m/p-reading	Yes; optionally, per group	Yes; optionally, per group
Input voltage
Rated value, DC	24 V	24 V
for signal "0"	0 to 5 V	0 to 5 V
for signal "1"	min. 15 V	min. 15 V
Input current
for signal "1", typ.	2.5 mA	2.5 mA
Input delay (for rated value of input voltage)
for standard inputs
parameterizable	Yes; all	Yes; all
at "0" to "1", min.	0.2 ms	0.2 ms
at "0" to "1", max.	12.8 ms	12.8 ms
for interrupt inputs
parameterizable	Yes; I 0.0 to I 0.3	Yes; I 0.0 to I 0.3
for counter/technological functions
parameterizable	Yes; (E0.0 to E0.5) 30 kHz	Yes; (E0.0 to E0.5) 30 kHz
Cable length
Cable length, shielded, max.	500 m; Standard input: 500 m, high-speed counters: 50 m	500 m; Standard input: 500 m, high-speed counters: 50 m
Cable length unshielded, max.	300 m; not for high-speed signals	300 m; not for high-speed signals
Digital outputs
Number of digital outputs	4; Transistor	4; Relay
Short-circuit protection	No; to be provided externally	No; to be provided externally
Limitation of inductive shutdown voltage to	1 W
Switching capacity of the outputs
with resistive load, max.	0.75 A	2 A
on lamp load, max.	5 W	30 W DC; 200 W AC
Output voltage
for signal "1", min.	20 VDC	L+/L1
Output current
for signal "1" rated value	750 mA	2 A
for signal "0" residual current, max.	0.1 mA	0 mA
Output delay with resistive load
0 to "1", max.	15 µs; of the standard outputs, max. (Q0.2 to Q0.3) 15 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 2 µs	10 ms; all outputs
1 to "0", max.	130 µs; of the standard outputs, max. (Q0.2 to Q0.3) 100 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 10 µs	10 ms; all outputs
Parallel switching of 2 outputs
for increased power	Yes	No
Switching frequency
of the pulse outputs, with resistive load, max.	20 kHz; Q 0.0 to Q 0.1
Aggregate current of outputs (per group)
horizontal installation
up to 55 °C, max.	3 A	6 A
up to 40 °C, max.	3 A	6 A
Cable length
Cable length, shielded, max.	500 m	500 m
Cable length unshielded, max.	150 m	150 m
Relay outputs
Number of operating cycles		10 000 000; mechanically 10 million, at rated load voltage 100,000
Analog inputs
Number of analog potentiometers	1; Analog potentiometer; resolution 8 bit	1; Analog potentiometer; resolution 8 bit
Encoder supply
24 V encoder supply
24 V	Yes; permissible range: 15.4 to 28.8 V	Yes; permissible range: 20.4 bis 28.8 V
Short-circuit protection	Yes; electronic at 600 mA	Yes; electronic at 600 mA
Output current, max.	180 mA	180 mA
Encoder
Connectable encoders
2-wire BEROS	Yes	Yes
permissible quiescent current (2-wire BEROS), max.	1 mA	1 mA
Integrated Functions
Number of counters	4; High-speed counters (30 kHz each), 32 bits (incl. sign), can be used as up/down counters or for connecting 2 incremental encoders with 2 pulse trains offset by 90° (max. 20 kHz (A/B counters)); parameterizable enable and reset input; interrupt facilities (incl. call of subroutine with any content) when the setpoint is reached; reversal in counting direction, etc.	4; High-speed counters (30 kHz each), 32 bits (incl. sign), can be used as up/down counters or for connecting 2 incremental encoders with 2 pulse trains offset by 90° (max. 20 kHz (A/B counters)); parameterizable enable and reset input; interrupt facilities (incl. call of subroutine with any content) when the setpoint is reached; reversal in counting direction, etc.
Counter frequency (counter) max.	30 kHz	30 kHz
Number of alarm inputs	4; 4 rising edges and/or 4 falling edges	4; 4 rising edges and/or 4 falling edges
Number of pulse outputs	2; high-speed outputs, 20 kHz, with interrupt option; pulse-width and frequency modulation option
Limit frequency (pulse)	20 kHz
Galvanic isolation
Galvanic isolation digital inputs
between the channels	Yes	Yes
between the channels, in groups of	2 and 4	2 and 4
Galvanic isolation digital outputs
between the channels	Yes; Optocoupler	Yes; Relay
between the channels, in groups of	4	1 and 3
Permissible potential difference
between different circuits	500 V DC between 24 V DC and 5 V DC	500 V DC between 24 V DC and 5 V DC; 1500 V AC between 24 V DC and 230 V AC
Environmental requirements
Environmental conditions	For further environmental conditions, see "Automation System S7-200, System Manual"	For further environmental conditions, see "Automation System S7-200, System Manual"
Operating temperature
vertical installation, min.	0 °C	0 °C
vertical installation, max.	45 °C	45 °C
horizontal installation, min.	0 °C	0 °C
horizontal installation, max.	55 °C	55 °C
Air pressure
permissible range, min.	860 hPa	860 hPa
permissible range, max.	1 080 hPa	1 080 hPa
Relative humidity
Operation, min.	5 %	5 %
Operation, max.	95 %; RH class 2 in accordance with IEC 1131-2	95 %; RH class 2 in accordance with IEC 1131-2
Degree of protection
IP20	Yes	Yes
Dimensions and weight
Dimensions
Width	90 mm	90 mm
Height	80 mm	80 mm
Depth	62 mm	62 mm
Weight
Weight, approx.	270 g	310 g