CPU 1516-3 PN/DP SIMATIC S7 1500 PLC 6ES7516-3AP03-0AB0

I. Product Description:

The SIMATIC 6ES7516-3AP03-0AB0 is a high-end standard CPU in the SIMATIC S7-1500 series, with the model number CPU 1516-3 PN/DP. Positioned within the series for medium- to large-scale, high-performance applications, it features an integrated PROFIBUS DP interface and is suitable for complex projects requiring connections to a large number of field devices or traditional PROFIBUS devices

This model differs significantly from the CPU 1515-2 PN. It provides three independent communication interfaces: two PROFINET interfaces (supporting IRT isochronous real-time and RT real-time communication) and one PROFIBUS DP interface.

It features 2 MB of program memory and 7.5 MB of data memory.

The CPU includes built-in OPC UA server and client functionality.

It supports password-based proprietary technology protection to prevent unautho rized reading or modification of programs. It also supports copy protection.

II. Product Specifications:

SIMATIC 6ES7516-3AP03-0AB0｜SIMATIC S7-1500 CPU 1516-3 PN/DP

• Firmware Update: Supported;
• Communication Interface 1: PROFINET IRT with integrated 2-port switch;
• Communication Interface 2: PROFINET RT;
• Communication Interface 3: PROFIBUS DP;
• PROFINET Interfaces: 2 × PROFINET interfaces;
• PROFIBUS Interface: 1 × PROFIBUS DP interface, RS-485, up to 12 Mbit/s;
• Bit Processing Performance: 6 ns;
• Program Work Memory: 2 MB;
• Data Work Memory: 7.5 MB;
• Load Memory: Via SIMATIC Memory Card;
• Memory Card: 1 × SIMATIC Memory Card slot; SIMATIC Memory Card required;
• Rated Supply Voltage: 24 V DC;
• Permitted Voltage Range: 19.2 to 28.8 V DC;
• Reverse Polarity Protection: Supported;
• Mains Buffering: 5 ms stored energy time, with a minimum repeat rate of 1/s;
• Rated Current Consumption: 0.69 A;
• Maximum Current Consumption: 1.08 A;
• Maximum Inrush Current: 1.15 A;
• I²t: 0.6 A²·s;
• Backplane Bus Power Supply: 12 W;
• Identification & Maintenance Data: Supports I&M0 to I&M3;
• Isochronous Mode: Supports distributed and central isochronous operation, with a minimum OB 6x cycle of 375 μs for distributed operation and 1 ms for central operation;
• Equidistance: Supported for PROFIBUS DP;
• Maximum PROFIBUS DP Devices: Up to 125;
• Maximum Distributed I/O Devices: Up to 1,000 distributed I/O devices via AS-i, PROFIBUS, or PROFINET;
• Engineering Software: STEP 7 / TIA Portal; configurable/integrated from TIA Portal V21 with Firmware V4.1, or V18 with Firmware V3.0 and higher;
• Configuration Control: Supported via data record;
• Display: Integrated display with a 6.1 cm screen diagonal;
• Control Elements: 8 keys and 2 mode buttons;
• Maximum Connections: Up to 256 connections via integrated interfaces and connected communication modules;
• PROFINET IO Controller: Supported;
• PROFINET IO Device: Supported;
• PROFINET Communication: Supports PROFINET RT, IRT, PROFIenergy, prioritized startup, and media redundancy;
• Media Redundancy: Supports MRP and MRPD via the first PROFINET interface; up to 50 stations in an MRP ring;
• Open IE Communication: Supports TCP/IP, ISO-on-TCP (RFC1006), and UDP;
• SIMATIC Communication: Supports PG/OP communication, S7 routing, data record routing, and S7 communication as client and server;
• Web Server: Supports HTTP, HTTPS, and Web API;
• Diagnostic Buffer: Up to 3,200 entries, including up to 500 power-fail-proof entries;
• Trace Functions: Supports up to 4 configurable traces, with up to 512 KB memory per trace;
• Motion Control: Supported; provides up to 2,400 Motion Control resources for technology objects;
• PID Control: Supports PID_Compact, PID_3Step, and PID-Temp;
• Programming Languages: Supports LAD, FBD, STL, SCL, and GRAPH;
• Protection Functions: Supports user program protection, password protection, copy protection, block protection, protection of confidential configuration data, and multi-level access protection;
• Installation Position: Supports horizontal and vertical installation;
• Dimensions (W × H × D): Approximately 70 × 147 × 129 mm;
• Weight: Approximately 524 g;
• Typical Applications: High-performance PLC control, PROFIBUS DP and PROFINET industrial communication, distributed I/O control, machine automation, motion control, production lines, and advanced industrial automation systems.

III. Technical Parameters:

SIMATIC S7-1500, CPU 1516-3 PN/DP, central processing unit with 2 MB work memory for program and 7.5 MB for data 1st interface: PROFINET IRT with 2-port switch, 2nd interface: PROFINET RT, 3rd interface: PROFIBUS, 6 ns bit performance, SIMATIC Memory Card required - - approvals and certificates according to entry 109817466 at support.industry.SIMATIC.com to be considered!

IV. Industries Served:

SIMATIC CPU 1516-3 PN/DP SIMATIC 6ES7516-3AP03-0AB0, a high-end model in the S7-1500 series

As part of its digital factory transformation, Audi has adopted the S7-1500 platform (including this high-performance model) to drive the digitization of its production processes

In real-world projects, it has also been used in large-scale automated systems—such as the JD Logistics North China Distribution Center—where it serves as the master PLC, working in coordination with numerous sub-station PLCs to achieve efficient sorting.

In the metallurgy sector, academic research has utilized the CPU 1516-3 PN/DP to design a furnace-front control system for heating furnaces, serving as the master controller for acquiring and analyzing on-site signals.

V. Why choose us?

We source directly from China’s Tier 1 channels, eliminating all middleman markups. This means you get competitive prices close to factory cost, and we pass those savings on to you as profit or budget flexibility for your projects.

Don’t let stockouts slow down your project schedule. For popular models like the S7-1500 and G120, which are frequently purchased, we always maintain high levels of in-stock inventory. The moment you place your order, the goods are already ready in our warehouse. Within 1–3 business days, you’ll receive the tracking number for your international express shipment. Whether your factory is in the Middle East, Southeast Asia, or across Europe and the Americas, our global logistics network helps you reclaim valuable time.

From precision manufacturing in Europe to oil and gas fields in the Middle East, and electronics assembly lines in Southeast Asia, our products and solutions have withstood the test of demanding operating conditions around the world. We deeply understand the unique characteristics of each market, and this global experience is the guarantee of your project’s successful implementation.

We don’t just sell products—we provide the technical support that keeps your equipment running smoothly. Whether you’re facing challenges with product selection, encountering commissioning errors, or dealing with unexpected failures, our technical team is always on standby to ensure your production line issues receive a professional response—not just a voicemail.

VI. FAQ:

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