Siemens 6ES5526-3LF01 6ES5526-3LG0 Communications Processor - CP526

 

The Siemens 6ES5526-3LF01 6ES5526-3LG0 is a legacy‑class communications processor module from the SIMATIC S5 PLC family, designated as the CP526‑2 communication unit. This module serves as a specialized interface that enables a SIMATIC S5 controller to communicate with external devices, operator panels, and programming terminals via serial and display interfaces. The 6ES5526-3LF01 6ES5526-3LG0 includes built‑in support for S5‑DOS operating environments and is designed with forced‑ventilation cooling, making it suitable for extended use in industrial control cabinets.With a memory capacity of 128 KB, it offers ample space for programming and storing user data, enhancing flexibility and customization.Its primary role within an S5 rack is to act as a gateway between the PLC and peripheral systems such as monochrome operator terminals, PG programming devices, or third‑party hardware, facilitating data exchange, diagnostics, and system monitoring functions.

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Model: 6ES5526-3LF01 6ES5526-3LG0
Product Type: SIMATIC S5 Communications Processor Module
Intended System: SIMATIC S5 PLC family (S5‑115U, S5‑135U, S5‑155U, etc.)
Operating Environment: Designed for use in industrial controllers and S5‑DOS terminal connections
Cooling Method: Forced ventilation – internal fan for continuous operation
Current Consumption: 200mA
Relative Humidity: 5% to 95%
Protection Class: IP20
Data Transmission Rate: Up to 19.2 kbps
Interface Type: RS-232 and RS-485
Serial Interfaces: Includes ports for PG/programmer and keyboard interfaces alongside display output
Memory Expansion Slot: Receives additional memory or submodules such as RAM/EPROM for configuration and programs
Backplane Interface: Standard SIMATIC S5 rack connector bus

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• Forced Ventilation Cooling: Equipped with a built‑in fan and heat‑dissipation design that supports continuous communication tasks in industrial environments where extended uptime is critical.
  
• Dual‑Interface Communication: The 6ES5526-3LF01 6ES5526-3LG0 combines both a serial communication interface (for programming PG/keyboard) and a display interface for monochrome operator terminals, enabling the S5 PLC to interact with external systems in real time.
• Legacy Terminal Support: Specifically designed to operate with S5‑DOS monochrome monitors, providing textual operator displays and diagnostics directly from the PLC without requiring modern graphical interfaces.
• Integration with S5 PLC Architecture: Plugs into the SIMATIC S5 backplane rack alongside CPU and I/O modules, enabling seamless integration within the legacy automation control system.
• Robust Industrial Design: Built with industrial‑grade electronic components and structured for long service life even in electrically noisy or harsh manufacturing environments.

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