Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP – 6ES7516-3AN02-0AB0

The Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP (6ES7516-3AN02-0AB0) is a high-performance industrial programmable logic controller (PLC) central processing unit designed for demanding machine automation, manufacturing, production control, and industrial process applications. It belongs to the Siemens SIMATIC S7-1500 automation family and combines fast processing, dedicated program and data memory, and three integrated communication interfaces.

This CPU provides two PROFINET interfaces and one PROFIBUS interface, making it suitable for compatible automation architectures that use modern industrial Ethernet alongside established PROFIBUS networks. It can be integrated with compatible distributed I/O, HMI panels, drives, and other industrial automation equipment.

The CPU 1516-3 PN/DP is intended for industrial engineers, OEM machine manufacturers, system integrators, maintenance teams, and facilities operating compatible Siemens SIMATIC S7-1500 control systems.

Key Features and Benefits

• Siemens SIMATIC S7-1500 PLC platform

• CPU 1516-3 PN/DP central processing unit

• Exact Siemens order number: 6ES7516-3AN02-0AB0

• 24V DC power supply

• 1 MB program work memory

• 5 MB data work memory

• Typical 10 ns bit-operation processing time

• First interface: PROFINET IRT with integrated 2-port switch

• Second interface: PROFINET RT

• Third interface: PROFIBUS

• Supports compatible distributed I/O configurations

• Supports industrial Ethernet and PROFIBUS communication

• SIMATIC Memory Card required

• Integrated front display and operating controls

• Compatible SIMATIC STEP 7/TIA Portal engineering software, depending on firmware

• Designed for demanding industrial automation and machine-control applications

Technical Specifications

Manufacturer: Siemens

Product Family: SIMATIC S7-1500

Product Model: CPU 1516-3 PN/DP

Order Number: 6ES7516-3AN02-0AB0

Product Type: PLC Central Processing Unit

Rated Supply Voltage: 24V DC

Permissible Supply Range: 19.2–28.8V DC

Program Work Memory: 1 MB

Data Work Memory: 5 MB

Typical Bit-Operation Processing Time: 10 ns

First Communication Interface: PROFINET IRT with integrated 2-port switch

Second Communication Interface: PROFINET RT

Third Communication Interface: PROFIBUS

SIMATIC Memory Card: Required

Firmware Version: V2.9, according to Siemens documentation for this version

Engineering Software: SIMATIC STEP 7 in TIA Portal

Software Compatibility: TIA Portal V17 with firmware V2.9 or V16 with firmware V2.8 and later supported configurations. Check Siemens documentation for the exact CPU revision.

Installation: SIMATIC S7-1500 system installation following Siemens instructions.

Technical specifications should be verified against the applicable Siemens datasheet and the exact hardware and firmware revision before purchase or installation.

High-Performance PLC Processing

The CPU 1516-3 PN/DP is designed to execute PLC programs for complex machine sequences, production processes, equipment monitoring, and industrial control applications. Its dedicated 1 MB program work memory and 5 MB data work memory support program execution and data handling for suitable automation projects.

The CPU can be programmed using supported Siemens STEP 7/TIA Portal languages, including Ladder Logic (LAD), Function Block Diagram (FBD), and Structured Control Language (SCL). Actual processing performance depends on the application program, communication load, configured hardware, and firmware.

PROFINET and PROFIBUS Communication

One of the key features of the CPU 1516-3 PN/DP is its combination of PROFINET and PROFIBUS interfaces.

PROFINET IRT interface: The first interface supports PROFINET IRT and includes an integrated 2-port switch for compatible industrial Ethernet network configurations.

PROFINET RT interface: The second interface provides an additional network interface for compatible PROFINET devices and network arrangements.

PROFIBUS interface: The third interface enables communication with compatible PROFIBUS equipment, which can be particularly useful in installations that use existing PROFIBUS networks.

These interfaces allow the CPU to integrate with suitable distributed I/O stations, operator interfaces, drives, and other industrial devices. Network design and device compatibility must be verified during system engineering.

Memory and System Integration

The CPU provides 1 MB of program work memory and 5 MB of data work memory. A compatible SIMATIC Memory Card is required for the storage and operating functions specified by Siemens.

The SIMATIC S7-1500 platform supports compatible signal modules, communication modules, and other system components. Before expanding or replacing equipment, verify the rack configuration, module compatibility, firmware requirements, communication settings, and available engineering software.

Typical Industrial Applications

The Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP may be suitable for:

• Industrial machine automation

• Manufacturing and production-line control

• Packaging and processing machinery

• Conveyor and material-handling systems

• Automated assembly equipment

• Industrial process monitoring and control

• Distributed I/O automation systems

• PROFINET-connected industrial networks

• PROFIBUS-based equipment integration

• OEM machinery and industrial control panels

• Existing Siemens S7-1500 system maintenance and replacement projects

Final suitability depends on the application's processing requirements, I/O configuration, network architecture, and overall control-system design.

Why Choose Siemens SIMATIC S7-1500?

The Siemens SIMATIC S7-1500 family provides an industrial automation platform for structured PLC programming, diagnostics, and integration with compatible automation devices. The CPU 1516-3 PN/DP combines fast processing and dedicated memory with PROFINET and PROFIBUS connectivity, supporting flexible integration in suitable industrial installations.

For maintenance teams and system integrators, the additional PROFIBUS interface can be important when working with compatible existing industrial equipment.

Product Availability and Successor Information

Siemens identifies 6ES7516-3AN02-0AB0 as a cancelled product and spare-part model. The listed successor is 6ES7516-3AP03-0AB0.

The successor is a newer CPU 1516-3 PN/DP with 2 MB program work memory, 7.5 MB data work memory, and a typical bit-operation processing time of 6 ns. It should not be treated as identical in every specification.

Before recommending the successor as a replacement, verify hardware compatibility, firmware, TIA Portal project configuration, connected modules, and applicable approvals.

For website listings, identify the older model as a discontinued/spare-part product and confirm current stock, condition, and availability before accepting an order.

Product Summary

Brand: Siemens

Series: SIMATIC S7-1500

Model: CPU 1516-3 PN/DP

Part Number: 6ES7516-3AN02-0AB0

Product Category: Industrial PLC Controller

Power Supply: 24V DC

Program Memory: 1 MB

Data Memory: 5 MB

Communication: PROFINET IRT, PROFINET RT, and PROFIBUS

Application: Industrial Automation, Machine Control, and Process Automation

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