Siemens S7-200 SMART PLC CPU SR20 AC/DC/RLY (6ES7288-1SR20-0AA0) | CPU ST20 DC/DC/DC (6ES7288-1ST20-0AA0)

The Siemens S7-200 SMART PLC is a compact, high-performance programmable logic controller designed for industrial automation, machine control, process control, packaging machines, conveyor systems, water treatment plants, and OEM equipment. Featuring high-speed processing, built-in Ethernet communication, pulse outputs, high-speed counters, and expandable I/O, it is an ideal solution for small and medium-sized automation applications.

Product Overview

The Siemens S7-200 SMART CPU offers reliable industrial performance with built-in Ethernet and RS485 communication, 12KB program memory, 20 onboard I/O points, high-speed pulse outputs, and support for up to six expansion modules. Available in both AC-powered relay output and DC-powered transistor output versions, it provides flexibility for various automation projects.

Available Models

Key Features

• Compact industrial PLC
• 12 Digital Inputs
• 8 Digital Outputs
• Built-in Ethernet Port (10/100 Mbps)
• Built-in RS485 Communication
• Optional RS232/RS485 Signal Board
• 12 KB Program Memory
• 8 KB Data Memory
• 10 KB Retentive Memory
• Supports up to 6 Expansion Modules
• Supports 1 Signal Board
• 4 High-Speed Counters (200 kHz)
• 2 Pulse Outputs (100 kHz)
• 12 Pulse Capture Inputs
• Built-in Real Time Clock
• Micro SDHC Memory Card Support
• Fast Processing Speed
• Industrial Grade Reliability

Technical Specifications

General

Memory

Digital I/O

High-Speed Functions

Communication

Performance

Timer & Counter Capacity

• 192 Non-retentive Timers (TON/TOF)
• 64 Retentive Timers (TONR)
• 256 Counters
• 128 Subroutines
• 128 Interrupt Programs
• 4 Accumulators

Power Supply

CPU SR20 AC/DC/RLY

• Input Voltage: 85–264V AC
• Frequency: 47–63 Hz
• Power Consumption: 14 W

CPU ST20 DC/DC/DC

• Input Voltage: 20.4–28.8V DC
• Power Consumption: 20 W

Applications

• Industrial Automation
• Factory Automation
• Packaging Machines
• Conveyor Systems
• Textile Industry
• Water Treatment Plants (WTP)
• Effluent Treatment Plants (ETP)
• Sewage Treatment Plants (STP)
• Food & Beverage Machines
• Pump Control Systems
• HVAC Automation
• OEM Machine Manufacturing
• Building Automation
• Solar Power Monitoring Systems
• Industrial Process Control

Why Choose Siemens S7-200 SMART PLC?

• Original Siemens Industrial PLC
• Fast Execution Speed
• Reliable 24/7 Industrial Operation
• Built-in Ethernet & RS485 Communication
• High-Speed Pulse Output for Servo & Stepper Control
• Expandable I/O Architecture
• Easy Programming with STEP 7-Micro/WIN SMART
• Ideal for Machine Builders & System Integrators

Package Includes

• 1 × Siemens S7-200 SMART PLC CPU
• User Documentation
• Original Factory Packaging