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

 SIMATIC S7-200 SMART CPU ST20, Model 6ES7288-1ST20-0AA0 Specification Sheet

Basic Information

• Product Name: Siemens SIMATIC S7-200 SMART CPU ST20

• Model Number: 6ES7288-1ST20-0AA0

• Brand: Siemens

Electrical Characteristics

• Power Supply:

• Voltage Range: DC 20.4V to 28.8V

• Lower Limit: 20.4V DC

• Upper Limit: 28.8V DC

• Input Current: Maximum 720 mA (at 24V DC)

• Switch-On Current: Maximum 11.7 A (at 28.8V DC)

• Output Current: Maximum 300 mA (at 24V DC)

Input/Output (I/O)

• Digital Inputs:

• Signal "0": I0.0 to I0.3 < 1V DC, I0.4 to I2.7 < 5V DC

• Signal "1": I0.0 to I0.3 > 4V DC, I0.4 to I2.7 > 15V DC

• Quantity: 12

• Type: DC 24V

• Input Voltage:

• Input Current: For signal "1", typically 4 mA

• Digital Outputs:

• Maximum 0.5A for resistive loads

• Maximum 5W for lighting loads

• Quantity: 8

• Type: Transistor Outputs, 24V DC

• Output Capacity:

• Short-Circuit Protection: None

Memory

• Program/Data Memory: 20 KB

• User Data Memory: 8 kbyte available

• Memory Type: DDR Flash and RAM

• Optional Memory: Supports microSDHC card

Processor Performance

• CPU Processing Time:

• Bit Operations: Typically 150 ns

• Word Operations: Typically 1.2 µs

• Float Operations: Typically 3.6 µs

Communication Interfaces

• Ethernet Interface:

• Quantity: 1

• Type: RJ45

• Galvanic Isolation: Yes, with 1500V AC transformer isolation

• Transmission Rate: 10/100 Mbit/s, auto-negotiation

• RS485 Interface:

• Quantity: 1

• Maximum Rate: 187.5 kbps (Note: The earlier mentioned 187.5 Mbps was likely a mistake, as RS485 speeds are typically measured in kbps)

Additional Features

• Real-Time Clock (RTC): Yes, with 7-day buffer

• Protection Class: Complies with EN 60529 standard, IP20

• Environmental Requirements:

• Minimum: -40°C

• Maximum: 70°C

• Minimum: 0°C

• Maximum: 55°C (horizontal mounting), 45°C (vertical mounting)

• Operating Temperature:

• Storage Temperature:

• EMC/EMV: Compliant with IEC 61000-4 series standards

• Programming Software: STEP 7 Micro/WIN SMART

Installation and Expansion

• Mounting: Rail mounting

• Expansion Capability: Supports expansion modules and signal boards