Description

The Siemens S7-200 CPU ST20 is a compact and powerful Programmable Logic Controller
(PLC) from the Siemens S7-200 series. Designed for small to medium-sized automation tasks, it
combines reliability, flexibility, and ease of use, making it a popular choice in various industrial
applications.
Key Features:
1. Compact Design:
Small form factor ideal for space-constrained control panels.
Robust build for industrial environments.
2. Processing Power:
Fast processing speed for handling complex tasks efficiently.
Supports multiple programming instructions, including timers, counters, and data
handling.
3. Input/Output Configuration:
Digital Inputs: Handles various input signals from switches, sensors, and other devices.
Digital Outputs: Operates relays, actuators, or other output devices.
4. Communication Capabilities:
Built-in RS-485 communication interface.
Supports PPI (Point-to-Point Interface) protocol for easy integration with Siemens HMIs
and other devices.
5. Memory and Storage:
Offers sufficient memory for small to medium-scale automation programs.
Retentive memory ensures data retention during power loss.
6. Flexible Programming:
Programmed using STEP 7-Micro/WIN software, which provides a user-friendly interface
for designing and testing control logic.
7. Expandability:
Supports I/O expansion modules to increase input/output points as needed.
Compatible with Siemens S7-200 series accessories and add-ons.
Technical Specifications:
• Model Number: S7-200 CPU ST20.
• I/O Configuration:
Digital Inputs: 12.
Digital Outputs: 8.
• Communication: RS-485 (PPI protocol).
• Programming Memory: Up to 4 KB.
• Power Supply: 24V DC.
• Cycle Time: Fast execution speed for basic instructions.
• Mounting: DIN rail or panel mount.
Applications:
The S7-200 CPU ST20 is widely used in:
• Small machine automation.
• Conveyor belt systems.
• Building automation.
• Packaging and labeling machines.
• Process monitoring and control