Product Description
Siemens 6ES7 288-1ST20-0AA1 (CPU ST20) Programmable Logic Controller (PLC) CPU Module
The Siemens SIMATIC S7-200 SMART CPU ST20 (model 6ES7 288-1ST20-0AA1) is a compact, high-efficiency programmable logic controller engineered for modern industrial automation systems. Operating on a 24 V DC power supply, this CPU module is equipped with 12 integrated 24 V DC digital inputs and 8 transistor digital outputs (24 V DC, 0.5 A), making it ideal for high-speed switching and precise machine control. It features native connectivity with an integrated RJ45 Ethernet port for seamless programming and HMI integration, along with an RS485 serial port (DB9) for standard industrial network communication. Built for harsh industrial environments, the module supports standard DIN-rail mounting and operates reliably within a temperature range of -20 °C to +60 °C in horizontal mount configuration.
Technical Specifications:
- Product Line: SIMATIC S7-200 SMART
- Part Number: 6ES7 288-1ST20-0AA1 (CPU ST20)
- Supply Voltage: 24 V DC
- Digital Inputs: 12 x 24 V DC (DIa 0–7, DIb 0–3)
- Digital Outputs: 8 x 24 V DC, 0.5 A (Transistor, DQa 0–7)
- Communication Interfaces: 1 x RJ45 Ethernet port, 1 x RS485 serial interface (DB9, X20)
- Diagnostic Indicators: LEDs for RUN, STOP, ERROR, and digital I/O channel status
- Mounting: Standard DIN-rail mounting
- Operating Temperature: -20 °C to +60 °C (Horizontal mount)
- Compliance & Certifications: CE, UKCA

Siemens 6ES7 288-1ST20-0AA1 (CPU ST20) Programmable Logic Controller (PLC) CPU Module
Shop the Siemens SIMATIC S7-200 SMART CPU ST20 (6ES7 288-1ST20-0AA1) PLC module featuring 12 DI, 8 transistor DQ, built-in Ethernet, and RS485 communication for reliable, compact industrial automation control.
| Brand | SIEMENS |
|---|---|
| Model | 6ES7 288-1ST20-0AA1 (CPU ST20) |
| Part No. | 979599010630 |
| Category | Electrical |
| Link | https://www.echuan-hydraulic.com/product/siemens-6es7-288-1st20-0aa1-cpu-st20-programmable-logic-controller-plc-cpu-module |
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