The Siemens SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) is a cornerstone of modern industrial automation, engineered to deliver exceptional performance and reliability in a compact form factor. This CPU module, part of the renowned S7-200 SMART series, combines a powerful 20 KB memory with a lightning-fast processor, making it ideal for mid-range control applications. Its integrated PROFINET interface ensures rapid, deterministic communication with higher-level systems, while the robust I/O configuration provides direct control over actuators and sensors. Whether you are upgrading an existing line or building a new system, this PLC offers the scalability and precision required for today's smart factories.
| Attribute |
Specification |
| Product Type |
Programmable Logic Controller (PLC) CPU Module |
| Model Number |
6ES7288-1ST20-0AA1 |
| Supply Voltage |
DC 20.4 – 28.8 V DC |
| Power Consumption (Max) |
20 W |
| Digital Inputs |
12 (24V DC, sink/source) |
| Input Characteristics (Signal 0) |
< 1V DC (I0.0–I0.3) or < 5V DC (I0.4–I2.7) |
| Input Characteristics (Signal 1) |
> 4V DC (I0.0–I0.3) or > 15V DC (I0.4–I2.7) |
| Input Current (Signal 1) |
Typical 4 mA |
| Digital Outputs |
8 (Transistor, 24V DC, 0.5A per channel) |
| Output Voltage (Signal 1) |
Min. DC 20V |
| Output Current (Signal 1) |
0.5A (resistive load) |
| Output Residual Current (Signal 0) |
Max. 10 µA |
| Program/Data Memory |
20 KB (12 KB program + 8 KB data) |
| Memory Type |
DDR Flash and RAM |
| Optional Memory |
microSDHC card (for program/data storage) |
| CPU Processing Time (Bit) |
Typical 150 ns |
| CPU Processing Time (Word) |
Typical 1.2 µs |
| CPU Processing Time (Float) |
Typical 3.6 µs |
| Communication Interface 1 |
PROFINET (RJ45, 10/100 Mbit/s, auto-negotiation) |
| Communication Interface 2 |
RS485 (1 port, supports PROFIBUS DP via CM DP module) |
| Protocols |
PROFINET IO, TCP/IP, MODBUS RTU (via RS485) |
| Integrated Functions |
6 counters, 8 PID loops, 3 fast pulse outputs (100 KHz) |
| Real-Time Clock (RTC) |
Yes, with 7-day buffer |
| EMC Compliance |
IEC 61000-4 (ESD, RF, transients) |
| Expansion Capability |
Up to 6 expansion modules + 1 signal board |
| Mounting Method |
DIN rail (35 mm) |
| Programming Software |
STEP 7 Micro/WIN SMART |
| Weight (Approx.) |
0.35 kg |
| Ambient Temperature (Operating) |
0°C to 55°C |
| Ambient Temperature (Storage) |
-40°C to 70°C |
| Protection Class |
IP20 (with enclosure) |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22