Siemens SIMATIC S7-300 CPU 319-3 PN/DP PLC – 6ES7318-3EL01-0AB0, 2 MB Work Memory

The Siemens SIMATIC S7-300 CPU 319-3 PN/DP (6ES7318-3EL01-0AB0) is a high-performance programmable logic controller (PLC) central processing unit designed for demanding industrial automation, machine control, and process applications. It features 2 MB of integrated work memory and three communication interfaces for connecting programming devices, PROFIBUS networks, PROFINET devices, and compatible automation equipment.

The CPU provides an MPI/PROFIBUS DP interface operating at up to 12 Mbit/s, a second PROFIBUS DP interface supporting master/slave operation, and a PROFINET Ethernet interface with an integrated two-port switch. It also supports isochronous operation through the supported PROFIBUS DP or PROFINET interface, making it suitable for compatible time-critical automation applications.

The CPU operates on 24 V DC and requires a compatible Siemens Micro Memory Card (MMC) for program and load-memory storage. It is designed for modular SIMATIC S7-300 systems and supports engineering using Siemens STEP 7 software.

Technical Specifications

Key Features

• 2 MB work memory: Supports complex PLC programs and automation data processing.

• Three communication interfaces: Combines MPI/PROFIBUS DP, a second PROFIBUS DP interface, and PROFINET Ethernet.

• PROFINET connectivity: Provides Ethernet-based industrial communication through an integrated two-port switch.

• PROFIBUS DP master/slave functionality: Supports compatible distributed I/O and fieldbus network architectures.

• Isochronous operation: Supports synchronized communication for suitable automation applications.

• Micro Memory Card support: Provides the required load memory for program storage.

• High-performance processing: Suitable for demanding control tasks in compatible S7-300 installations.

• Legacy automation maintenance: Helps maintain existing Siemens systems using the CPU 319-3 PN/DP platform.

Applications

• Complex industrial machine automation

• High-speed production-line control

• PROFINET industrial Ethernet networks

• PROFIBUS DP distributed I/O systems

• Synchronized automation and motion-related applications

• Manufacturing and packaging equipment

• Industrial process monitoring and control

• Maintenance and refurbishment of Siemens S7-300 systems

Compatibility and Installation Notes

Before purchasing, verify the exact part number, rack configuration, connected I/O modules, PROFIBUS and PROFINET network settings, Micro Memory Card requirements, and STEP 7 project compatibility. CPU replacement may require program transfer, hardware configuration checks, and recommissioning by a qualified automation technician.

Important: This model provides both PROFINET and PROFIBUS DP interfaces, but it is not automatically interchangeable with other S7-300 CPUs. Check the original hardware configuration and communication requirements before selecting a replacement.

Availability notice: Siemens lists this model under its product phase-out announcement, effective October 1, 2023. Availability may depend on remaining stock and specialist automation suppliers. Confirm whether the unit is new, refurbished, or used, and verify warranty and authenticity before ordering.