SIEMENS PLC CPU 221

SIEMENS PLC CPU 221 6ES7211-0AA23-0XB0

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SIMATIC S7-200, CPU 221 Compact unit, DC power supply 6 DI DC/4 DO DC 4 KB progr./2 KB data.

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SIEMENS PLC CPU 221 6ES7211-0AA23-0XB0

SIEMENS PLC CPU 221

Data Sheet-

Supply voltage
Rated value (DC)
● 24 V DC Yes
Load voltage L+
● Rated value (DC) 24 V
● permissible range, lower limit (DC) 20.4 V
● permissible range, upper limit (DC) 28.8 V
Input current
Inrush current, max. 10 A; at 28.8 V
from supply voltage L+, max. 450 mA; 80 to 450 mA
Encoder supply
24 V encoder supply
● 24 V Yes; permissible range: 15.4 to 28.8 V
● Short-circuit protection Yes; electronic at 600 mA
● Output current, max. 180 mA
Power loss
Power loss, typ. 3 W
Memory
Number of memory modules (optional) 1; pluggable memory module, content identical with integral EEPROM; can additionally store recipes, data logs and other files
Work memory
● integrated (for program) 4 kbyte
● integrated (for data) 2 kbyte
Backup
● present Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenancefree 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
Battery
Backup battery
● Backup time, max. 50 h; (min. 8 h at 40 °C); 200 days (typ.) with optional battery module
CPU processing times
for bit operations, max. 0.22 µs
Counters, timers and their retentivity
S7 counter
● Number 256
Retentivity
— adjustable Yes; via high-performance capacitor or battery
— lower limit 1
— upper limit 256
Counting range
— lower limit 0
— upper limit 32 767
S7 times
● Number 256
Retentivity
— adjustable Yes; via high-performance capacitor or battery
— upper limit 64
Time range
— lower limit 1 ms
— upper limit 54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to54 min
Data areas and their retentivity
Flag
● Size, max. 32 byte
● Retentivity available Yes; M 0.0 to M 31.7
● of which retentive with battery 0 to 255, via high-performance capacitor or battery, adjustable
● of which retentive without battery 0 to 112 in EEPROM, adjustable
Hardware configuration
connectable programming devices/PCs SIMATIC PG/PC, standard PC
Digital inputs
Number of digital inputs 6; Integrated
Source/sink input Yes; optionally, per group
Input voltage
● Rated value (DC) 24 V
● for signal “0” 0 to 5 V
● for signal “1” min. 15 V
Input current
● for signal “1”, typ. 2.5 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable Yes; all
— at “0” to “1”, min. 0.2 ms
— at “0” to “1”, max. 12.8 ms
for interrupt inputs
— parameterizable Yes; I 0.0 to I 0.3
for technological functions
— parameterizable Yes; (E 0.0 to E 0.5) 30 kHz
Cable length
● shielded, max. 500 m; Standard input: 500 m, high-speed counters: 50 m
● unshielded, max. 300 m; not for high-speed signals
Digital outputs
Number of digital outputs 4; Transistor
Short-circuit protection 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
● on lamp load, max. 5 W
Output voltage
● for signal “1”, min. 20 V DC
Output current
● for signal “1” rated value 750 mA
● for signal “0” residual current, max. 0.1 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
● “1” to “0”, max. 130 µs; of the standard outputs, max. (Q0.2 to Q0.3) 100 µs; of the pulseoutputs, max. (Q0.0 to Q0.1) 10 µs
Parallel switching of two outputs
● for uprating Yes