General information
Part Number	6ES7288-1CR20-0AA1
Product type designation	CPU CR20 AC/DC/relay
Engineering with
● Programming package	STEP 7 Micro/WIN SMART
Installation type/mounting
Rail mounting	Yes; Standard – DIN rail
Supply voltage
Rated value (AC)	230 V; 230 V AC (L1, N)
● 120 V AC	Yes; 85 to 132 V AC
● 230 V AC	Yes; 170 to 264 V AC
permissible range, lower limit (AC)	85 V
permissible range, upper limit (AC)	264 V
Reverse polarity protection	No
Line frequency
● permissible range, lower limit	47 Hz
● permissible range, upper limit	63 Hz
Load voltage L+
● Rated value (DC)	24 V
● permissible range, lower limit (DC)	5 V
● permissible range, upper limit (DC)	250 V
Input current
Current consumption (rated value)	60 mA; At 220 V AC
Current consumption, max.	80 mA; At 220 V AC
Inrush current, max.	16.3 A; at 264 V
Power loss
Power loss, max.	6 W
Memory
Type of memory	DDR
Flash	Yes
RAM	Yes
Micro Memory Card	No
CPU processing times
for bit operations, typ.	150 ns; / instruction
for word operations, typ.	1.2 µs; / instruction
for floating point arithmetic, typ.	3.6 µs; / instruction
Hardware configuration
Integrated power supply	No
Time of day
Clock
● Type	Software clock
● Hardware clock (real-time)	No
Digital inputs
Number of digital inputs	12; Integrated
● of which inputs usable for technological functions	4; HSC: 4 @ 100 kHz single phase, 2 @ 50 kHz A/B phase
Source/sink input	Yes
Input voltage
● Type of input voltage	DC
● Rated value (DC)	24 V; DC at 4 mA nominal
● for signal “0”	< 5 V DC
● for signal “1”	+15 to +30 V
Input current
● for signal “0”, max. (permissible quiescent current)	1 mA
● for signal “1”, typ.	4 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable	Yes; 0.2 µs, 0.4 µs, 0.8 µs, 1.6 µs, 3.2 µs, 6.4 µs and 12.8 µs,selectable in 4 groups
— at “0” to “1”, min.	0.2 µs
— at “0” to “1”, max.	12.8 µs
for interrupt inputs
— parameterizable Yes
Cable length
● shielded, max.	500 m; Standard input: 500 m, high-speed counters: 50 m
● unshielded, max.	300 m
Digital outputs
Number of digital outputs	8; Relays
Switching capacity of the outputs
● with resistive load, max.	2 A
● on lamp load, max.	30 W; 30 W with DC, 200 W with AC
Output delay with resistive load
● “0” to “1”, max.	10 ms; max.
● “1” to “0”, max.	10 ms; max.
Switching frequency
● of the pulse outputs, with resistive load, max.	1 Hz
Relay outputs
● Number of relay outputs	8
● Number of operating cycles, max.	10 000 000; mechanically 10 million, at rated load voltage 100 000
Cable length
● shielded, max.	500 m
● unshielded, max.	300 m
Interfaces
Number of industrial Ethernet interfaces	0
Number of RS 485 interfaces	1
Optical interface	No
1. Interface
Interface type	RS 485 (max. 187.5 kbps)
Isolated	Yes; 500 V AC or 707 V DC
Interface types
● RS 485	Yes
● Design of the connection	9-pin sub D socket
Protocols
Supports protocol for PROFINET IO	No
PROFIBUS	No
Protocols (Ethernet)
● TCP/IP	No
EMC
Interference immunity against discharge of static electricity
● Interference immunity against discharge of static electricity acc. to IEC 61000-4-2	Yes
— Test voltage at air discharge	8 kV
— Test voltage at contact discharge	4 kV
Interference immunity against high-frequency electromagnetic fields
● Interference immunity against high-frequency radiation acc. to IEC 61000-4-3	Yes; 10 V/m, 80 to 1 000 MHz (to IEC 61000-4-3); 10 V/m, 900 MHz,1.89 GHz, 50% ED (to IEC 61000-4-3)
— Frequency range of the RF radiation	10 V/m for 80 MHz ~ 1 GHz, 3 V/m for 1.4 GHz ~ 2 GHz, 3 V/m for 87 MHz ~ 108 MHz, 174 MHz ~ 230 MHz, 470 MHz ~ 790 MHz, 1.4 GHz ~ 2 GHz, 1 V/m for 2 GHz ~ 2.7 GHz
Interference immunity to cable-borne interference
● Interference immunity on supply lines acc. to IEC 61000-4-4	Yes; ±2 kV acc. to IEC 61000-4-4, burst; surge measurements with additional protective elements
● Interference immunity on signal cables acc. to IEC 61000-4-4	Yes; ±2 kV acc. to IEC 61000-4-4, Burst
Interference immunity against voltage surge
● Interference immunity on supply lines acc. to IEC 61000-4-5	Yes; ±1 kV (acc. to IEC 61000-4-5; 1995; surge symm.), ±2 kV (acc. to IEC 61000-4-5; 1995; surge asymm.), no external protective circuit required
● asymmetric interference
— Test voltage on supply cables	2 kV
— Test voltage on signal cables >30m	2 kV
Interference immunity against conducted variable disturbance induced by high-frequency fields
● Interference immunity against high frequency current feed acc. to IEC 61000-4-6	Yes; 10 V, 150 kHz to 80 MHz (to IEC 61000-4-6)
Emission of radio interference acc. to EN 55 011
● Limit class A, for use in industrial areas	Yes; Emission of radio interference acc. to EN 61000-6-4 +A1 for use in industrial environments
Emission of conducted and non-conducted interference
● Interference emission via line/AC current cables	EN 61000-6-4, interference emission: Intended for use in industrial areas.
Degree and class of protection
IP degree of protection	IP20
Standards, approvals, certificates
CE mark	Yes
Ambient conditions
Free fall
● Fall height, max.	0.5 m; five times, in product package
Ambient temperature during operation
● min.	0 °C
● max.	55 °C
● horizontal installation, min.	0 °C
● horizontal installation, max.	55 °C
● vertical installation, min.	0 °C
● vertical installation, max.	45 °C
Ambient temperature during storage/transportation
● min.	-40 °C
● max.	70 °C
Air pressure acc. to IEC 60068-2-13
● Storage/transport, min.	660 hPa
● Storage/transport, max.	1 080 hPa
Altitude during operation relating to sea level
● Installation altitude, min.	-1 000 m
● Installation altitude, max.	2 000 m
Relative humidity
● Operation at 25 ℃ without condensation, max.	95%
configuration / header
configuration / programming / header
Programming language
— LAD	Yes
— FBD	Yes
— STL	Yes
Dimensions
Width	90 mm
Height	100 mm
Depth	81 mm
Weights
Weight, approx.	365 g; approx.