Siemens 6ES7288-1ST20-0AA0 SIMATIC S7-200 SMART CPU ST20

6ES72881ST200AA0 – The SIMATIC S7-200 SMART CPU ST20 is a compact and cost-effective standard CPU featuring 12 digital inputs and 8 digital outputs with DC power operation. It includes 20 KB of program/data memory, making it ideal for basic automation tasks. This model has been discontinued since 01.10.2021, and replaced by the upgraded version 6ES7288-1ST20-0AA1.

Technical Specifications

• Model: 6ES7288-1ST20-0AA0 Siemens
• Series: SIMATIC S7-200 SMART
• CPU Type: ST20 – Standard CPU
• Digital Inputs: 12 DI @ 24 V DC
• Digital Outputs: 8 DO @ 24 V DC
• Power Supply: DC 20.4–28.8 V
• Memory: 20 KB (Program/Data combined)
• I/O Type: Onboard integrated
• Control Voltage Type: DC/DC/DC
• Net Weight: 0.390 kg
• Dimensions (H×W×D): 123 × 134 × 113 mm
• Country of Origin: China
• Lifecycle Status: Product cancellation since 01.10.2021
• Successor: 6ES7288-1ST20-0AA1

Function & Application

Purpose: The S7-200 SMART CPU ST20 is designed for basic logic control, providing reliable I/O processing in compact automation systems. Its onboard I/O and small footprint make it a practical option for OEM machines, small-scale control panels, and educational applications.

Typical Applications:

• Compact machine automation
• Small-scale conveyor and pump control
• Retrofit or maintenance of S7-200 SMART systems
• Educational and training kits

Performance & Features

• 12 DI / 8 DO Onboard. Reduces system wiring and saves on I/O modules.
• DC/DC/DC Power. Simplifies installation in low-voltage panels.
• 20 KB Memory Capacity. Supports simple control logic and data handling.
• Compact Housing. Ideal for space-constrained cabinets.
• Legacy-Compatible. Spare part for installed S7-200 SMART base systems.

6ES7288-1ST20-0AA0 Compliance & Classification

• RoHS Compliance: Since 31.10.2013
• WEEE Take-Back Obligation: Yes

REACH Substances:

• Lead (CAS 7439-92-1) > 0.1%
• Lead monoxide (CAS 1317-36-8) > 0.1%
• 6,6′-di-tert-butyl-2,2′-methylenedi-p-cresol > 0.1%
• Commodity Code: 85371091
• Catalog ID: ST72-CN
• Product Group: 4050
• Group Code: R131
• Product Class: A – Returnable stock item
• EAN: 6940408102347

Key Features & Benefits:

✅ 12 DI / 8 DO Built-In. Ideal for small applications and cost-conscious designs.

✅ DC Input, Output, and Supply. Simplified wiring and power distribution.

✅ Compact CPU Design. Optimized for tight enclosures.

✅ Legacy System Compatibility. Spare part for existing S7-200 SMART ST20 systems.

✅ Upgrade Available. Move to 6ES7288-1ST20-0AA1 for web server support and enhancements.

📦 Order Today for Fast UK & Europe Delivery!

At Drive Outlet Megastore, we offer unbeatable Siemens 6ES7288-1ST20-0AA0 prices, while limited spare stock remains. Delivery is fast and reliable across the UK and Europe.

Need help with system upgrades, CPU replacements, or transitioning to the ST20 successor?
Contact our Siemens control experts now.

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