Siemens SIMATIC S7-200 SMART CPU ST20

Series#: Siemens

Product Details

Siemens SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) – A high-performance, compact controller for demanding automation tasks.
12 Digital Inputs & 8 Transistor Outputs – Ideal for high-speed switching and precise control in 24V DC systems.
20 KB Program/Data Memory – Ample storage for complex logic, with optional microSDHC card expansion.
Integrated Ethernet & RS485 Ports – Seamless networking via PROFINET, Modbus TCP, or USS with 10/100 Mbit/s auto-negotiation.
Robust Environmental Resilience – Operates from -40°C to 70°C (storage) and -25°C to 55°C (horizontal mounting), IP20 rated.
Real-Time Clock (RTC) with 7-Day Buffer – Ensures time-stamped data logging and scheduled operations without external power.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The Siemens SIMATIC S7-200 SMART CPU ST20, model 6ES7288-1ST20-0AA0, is a standard DC-powered controller engineered for mid-range automation solutions. Combining a 150 ns bit-operation speed with 20 KB of integrated memory, this CPU delivers reliable performance for applications from conveyor systems to packaging machinery. Its transistor outputs provide fast, maintenance-free switching, while the built-in Ethernet interface supports seamless integration into modern industrial networks. Every unit is 100% original and new, ensuring long-term dependability.

Specification	Details
Product Name	Siemens SIMATIC S7-200 SMART CPU ST20
Model Number	6ES7288-1ST20-0AA0
Brand	Siemens
Power Supply Voltage Range	DC 20.4V to 28.8V
Input Current (Max)	720 mA at 24V DC
Switch-On Current (Max)	11.7 A at 28.8V DC
Output Current (Max)	300 mA at 24V DC
Digital Inputs	12 (Type: DC 24V, Signal "0": I0.0-I0.3 < 1V DC, I0.4-I2.7 < 5V DC; Signal "1": I0.0-I0.3 > 4V DC, I0.4-I2.7 > 15V DC; Input current: typical 4 mA at signal "1")
Digital Outputs	8 (Type: Transistor, 24V DC; Resistive load max 0.5A; Lighting load max 5W; No short-circuit protection)
Program/Data Memory	20 KB (DDR Flash and RAM)
User Data Memory	8 KB
Optional Memory	microSDHC card (supports program transfer and firmware update)
CPU Processing Time (Bit Operations)	Typically 150 ns
CPU Processing Time (Word Operations)	Typically 1.2 µs
CPU Processing Time (Float Operations)	Typically 3.6 µs
Ethernet Interface	1 x RJ45, 10/100 Mbit/s, auto-negotiation, galvanic isolation (1500V AC transformer)
RS485 Interface	1 x port, max rate 187.5 kbps
Real-Time Clock (RTC)	Yes, with 7-day buffer (capacitor-based)
Protection Class	IP20 (EN 60529)
Operating Temperature (Horizontal Mounting)	0°C to 55°C
Operating Temperature (Vertical Mounting)	0°C to 45°C
Storage Temperature	-40°C to 70°C
EMC/EMV Compliance	IEC 61000-4 series
Programming Software	STEP 7 Micro/WIN SMART
Mounting	DIN Rail mounting
Expansion Capability	Supports expansion modules and signal boards