Siemens 6ES5535-3LB12 Communications Processor - CP535

 

The Siemens 6ES5535-3LB12 is a communications processor module designed for the SIMATIC S5 PLC family, specifically designated as the CP535 unit. This module enables advanced communication capability within an S5 automation system, allowing the PLC to connect to industrial networks and external devices via the SINEC H1 communications protocol - a high‑performance fieldbus standard used in legacy Siemens networks. The 6ES5535-3LB12 supports networked data transfer between the PLC and distributed systems, terminals, or higher‑level controllers, facilitating efficient exchange of process data, status information, and commands across complex automation topologies. The 6ES5535-3LB12 module is a CPU module with a processing power of 24 MHz and 64 KB of RAM. It supports a maximum of 2,048 I/O points and has a communication interface for PROFIBUS, PROFIdriver, and PROFINET.Notably, this version is supplied without the onboard 15 V power module, meaning it requires an external 15 V supply for full SINEC H1 operation.

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Model: 6ES5535-3LB12
PLC Compatibility: Designed for SIMATIC S5 controller systems
Communication Standard: Supports SINEC H1 network protocol for industrial fieldbus communication
Voltage Module Configuration: Supplied without 15 V power module; external 15 V module required for full operation
Input Voltage: 24V DC ±10%
Shielding Efficiency: 120dB @ 1GHz
Protection Class: IP66
Operating Temperature: -25°C to +60°C
User Memory: Includes support for onboard EPROM and RAM memory for configuration and communication control

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• SINEC H1 Network Support: The 6ES5535-3LB12 provides fieldbus communication capability using Siemens' SINEC H1 protocol, enabling high-speed data exchange across distributed automation systems, remote I/O nodes, and host controllers.
  
• Legacy PLC Integration: Specifically engineered to integrate with SIMATIC S5 PLC systems (such as the 115U, 135U, or 155U), the 6ES5535-3LB12 provides communication networking that extends the operational utility of legacy automation installations.
• Modular Communication Processor: As a dedicated CP (Communications Processor), this module offloads intensive network processing tasks from the main PLC CPU, improving overall system performance during complex data handling.
• Flexible Network Topologies: This module supports connection into linear or hierarchical network setups, allowing the S5 PLC to interact seamlessly with other controllers and modern supervisory (SCADA) systems.
• Robust Industrial Construction: The 6ES5535-3LB12 is built to rigorous industrial standards for long‑term use in challenging environments, featuring solid-state electronic components and a durable mechanical housing.

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