Siemens SIMATIC S7-300 CPU 315-2 PN/DP PLC – 6ES7315-2EH14-0AB0, 384 KB Work Memory

The Siemens SIMATIC S7-300 CPU 315-2 PN/DP (6ES7315-2EH14-0AB0) is a programmable logic controller central processing unit designed for industrial automation, machine control, and process monitoring. It features 384 KB of integrated work memory, an MPI/PROFIBUS DP communication interface, and an Ethernet PROFINET interface with an integrated two-port switch.

The CPU executes PLC programs, processes automation logic, and communicates with compatible field devices, distributed I/O systems, and industrial networks. Its combined communication capabilities make it suitable for S7-300 applications that require both PROFIBUS DP and PROFINET connectivity.

The unit operates from a 24 V DC supply and requires a compatible Siemens Micro Memory Card (MMC) for program and load-memory storage. It is intended for compatible SIMATIC S7-300 installations and supports engineering with Siemens STEP 7 software.

Technical Specifications

Key Features

• 384 KB work memory: Supports execution of compatible PLC programs and processing of automation data.

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

• PROFIBUS DP and MPI: Supports communication with compatible field devices, programming devices, and operator interfaces.

• Integrated 24 V DC power supply: Designed for compatible SIMATIC S7-300 system installations.

• Micro Memory Card support: Provides the required external load memory for PLC programs and data.

• Dual-network flexibility: Supports applications that combine PROFINET and PROFIBUS DP equipment.

• Legacy system maintenance: Helps maintain existing S7-300 installations where the original hardware and program remain compatible.

Applications

• Factory and production-line automation

• Industrial machine control

• PROFINET-based automation networks

• PROFIBUS DP distributed I/O systems

• Process monitoring and control

• Packaging and manufacturing machinery

• Maintenance and refurbishment of Siemens S7-300 systems

Compatibility and Installation Notes

Before ordering, verify the exact part number, hardware revision, rack configuration, installed I/O modules, PROFINET and PROFIBUS network settings, and Micro Memory Card requirements. Confirm STEP 7 project compatibility before transferring or restoring the program. CPU replacement may require hardware configuration checks and commissioning by a qualified automation technician.

Availability notice: Siemens identifies this model as a phased-out product and lists it as a spare part. 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 purchase.