Siemens 6ES7315-2EH14-0AB0 SIMATIC S7‑300 CPU 315‑2 PN/DP PLC 24V DC

Central processing unit for medium‑scale S7‑300 automation systems with integrated PROFINET interface, 2‑port switch, and MPI/DP for flexible industrial networking.

The Siemens 6ES7315‑2EH14‑0AB0 is a SIMATIC S7‑300 CPU 315‑2 PN/DP, designed for distributed automation where both centralised I/O and PROFINET/DP networks are required. Powered by 24 V DC, this CPU handles medium program size and can be used as a PROFINET IO controller, as a PROFIBUS DP master, or as distributed intelligence slave. It provides 384 KB of integrated work memory and supports a Micro Memory Card (MMC) for load memory expansion, making it suitable for installation upgrades and replacement of older 315‑2 PN/DP models.

This CPU is also ideally suited for integration into a PROFINET IO system and for use in a distributed automation architecture, e.g. as IO controller or as both PROFINET IO device and PROFIBUS DP master. The 2‑port switch of the integrated PROFINET interface enables a line topology without additional external switches.

Applications

• Distributed automation structures in manufacturing, packaging and assembly lines

• Medium‑sized S7‑300 control systems with both centralised and decentralised I/O

• Replacement or upgrade of existing S7‑300 CPUs like the 6ES7315‑2EH13‑0AB0

• Mixed network configurations where PROFINET IO and PROFIBUS DP coexist

• Industrial applications that require a strong industrial Ethernet connection with built‑in switch

Key Features

• 384 KB integrated work memory for program execution and data handling

• 2‑port switch on the PROFINET interface for line‑topology wiring; Ethernet PROFINET as second interface (2‑port switch)

• MPI/DP as first interface (12 Mbit/s) for programming and PROFIBUS DP communication

• Can be used as PROFINET IO controller, PROFIBUS DP master, or as distributed intelligence DP slave

• Micro Memory Card (MMC) required for load memory

• PROFIsafe communication: The CPU 315‑2 PN/DP supports PROFIsafe via the PROFINET IO interface when a fail‑safe CPU (e.g. CPU 315F‑2 PN/DP) is used; the standard variant alone is not F‑CPU. For PROFIsafe via PROFIBUS DP additional F‑modules (distributed safety I/O with F‑master) are required (conform to safety communication for fail‑safe signals).

• STEP 7 V5.5 or higher (STEP 7 for hardware configuration)

Technical Specifications

System Integration

• Programming Software: STEP 7 V5.5 or higher (as per Siemens official documentation)

• Network Compatibility: PROFINET IO, PROFIBUS DP, MPI, TCP/IP

• Expansion: Works with all S7‑300 signal, communication and function modules, ET 200M remote I/O

Related Products

• Programming Software: Siemens STEP 7 V5.5 (SP5 or higher) – engineering tool

• Micro Memory Card (MMC): Siemens 6ES7954‑8LC03‑0AA0 (128 KB up to 8 MB)

• Communication Processor: Siemens 6GK7343‑1EX30‑0XE0 – CP 343‑1 Advanced

• Signal Module: Siemens 6ES7321‑1BH02‑0AA0 – SM 321 DI 16×24 V DC

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