Description
Siemens 6ES7414-3EM06-0AB0
Product Introduction
The Siemens 6ES7414-3EM06-0AB0 is a CPU 414-3 PN/DP central processing unit from the SIMATIC S7-400 PLC family. It is designed for mid-range to higher-performance automation systems where substantial program memory, multiple communication paths, and deterministic PLC processing are required. The CPU provides 4 MB of working memory, divided into 2 MB for code and 2 MB for data, and supports the S7-400 architecture used extensively in process plants, production systems, utilities, and large machine-control installations. Siemens documentation identifies this exact order number as CPU 414-3 PN/DP.
The Siemens 6ES7414-3EM06-0AB0 combines an MPI/PROFIBUS DP interface with an integrated Ethernet/PROFINET interface. The MPI/DP interface supports communication at up to 12 Mbit/s, while the integrated Ethernet/PROFINET interface provides direct plant-network connectivity without requiring a separate Ethernet communication processor for basic PROFINET communication. The CPU also provides a slot for an additional interface module, with Siemens documentation identifying the IF 964-DP as a supported option.
From a replacement perspective, the Siemens 6ES7414-3EM06-0AB0 needs to be treated as a specific hardware and firmware generation rather than simply as a generic “CPU 414.” Siemens product information lists firmware V6.0 for this order number, with later documentation identifying V6.0.6 and other firmware revisions. Siemens lifecycle information indicates that this order number was cancelled and replaced by 6ES7414-3EM07-0AB0. For an existing S7-400 installation, the original order number may still be preferable when maintaining an established hardware configuration, but firmware, STEP 7 project configuration, communication modules, and application dependencies should be checked before substitution.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 6ES7414-3EM06-0AB0 |
| Manufacturer | Siemens |
| Product Family | SIMATIC S7-400 |
| CPU Type | CPU 414-3 PN/DP |
| Product Type | Central Processing Unit / PLC CPU |
| Work Memory | 4 MB total |
| Code Memory | 2 MB |
| Data Memory | 2 MB |
| Integrated Interface 1 | MPI / PROFIBUS DP |
| MPI/DP Speed | Up to 12 Mbit/s |
| Integrated Interface 2 | Industrial Ethernet / PROFINET |
| Additional Interface | 1 × IF-module slot |
| Supported IF Module Reference | IF 964-DP, depending on configuration |
| Programming Environment | STEP 7 V5.5 or higher |
| Firmware | V6.0 generation; later V6.x firmware documented |
| 5 V Backplane Current | Typical 1.3 A; maximum 1.5 A |
| 24 V DC Current | Maximum 300 mA, with 150 mA per DP interface |
| Typical Power Loss | Approximately 6.5 W |
| Supply Arrangement | CPU receives power through the S7-400 system power supply |
| Installation | S7-400 rack / backplane |
| Mounting | S7-400 rack mounting |
| Product Status | Legacy / cancelled order number |
| Successor Listed | 6ES7414-3EM07-0AB0 |
The CPU does not use 24 VDC as its primary CPU supply input in the same manner as many compact PLCs. The S7-400 rack’s system power supply provides the required backplane power. This distinction matters when checking cabinet power calculations and replacement compatibility.
6ES7414-3EM06-0AB0
Main Features and Engineering Considerations
Integrated MPI/PROFIBUS DP
The first integrated communication interface combines MPI and PROFIBUS DP functionality and supports communication rates up to 12 Mbit/s. This makes the CPU suitable for S7-400 installations with established PROFIBUS remote I/O, drives, distributed stations, and engineering connections. The existing DP network should be checked before changing CPU hardware because station addresses, configured bus parameters, diagnostic behavior, and project configuration all depend on the actual system design.
Integrated PROFINET Interface
The CPU 414-3 PN/DP generation introduced integrated Ethernet/PROFINET capability. This can eliminate the need for a separate Ethernet CP for basic PROFINET communication, but it does not mean every existing S7-400 communication architecture can be simplified. Legacy plants may still rely on CP modules, configured connections, S7 communication blocks, or specific network topologies.
4 MB Working Memory
The 4 MB work memory is divided into 2 MB code and 2 MB data. For an existing machine or process application, this is more important than simply comparing CPU family numbers. A replacement CPU must have sufficient memory for the actual loaded project, retained data requirements, communication configuration, and installed technology functions.
IF Module Expansion
An interface-module position provides additional communication flexibility. Siemens documentation identifies the IF 964-DP as an applicable module for this CPU generation. This can be important in installations that require additional PROFIBUS connectivity or specialized communication architecture.
Firmware and Replacement Risk
The biggest procurement issue is the distinction between 6ES7414-3EM06-0AB0 and 6ES7414-3EM07-0AB0. Siemens lists the EM07 version as the substitute for the EM06 order number. That does not mean a blind physical swap is always appropriate. Review the STEP 7 hardware configuration, firmware requirements, installed communication modules, technology objects, and startup behavior before changing CPU generations.
Legacy System Considerations
This CPU is now a legacy component. Siemens lifecycle information records the EM06 order number as cancelled, with a cancellation date shown as October 1, 2016 in the referenced product record. That makes condition, storage history, battery status where applicable, connector condition, and functional testing more important when sourcing replacement stock.
Application Scenarios
Process Automation
The CPU 414-3 PN/DP is appropriate for S7-400-based process-control architectures where substantial PLC program capacity and multiple industrial communication interfaces are required.
Manufacturing Lines
It can serve as the central controller for large production machines and interconnected automation cells using PROFIBUS DP and PROFINET communication.
Distributed I/O Systems
Existing PROFIBUS DP installations can use the integrated DP interface to communicate with distributed field devices and remote I/O stations.
Plant Network Integration
The integrated Ethernet/PROFINET interface allows the controller to participate directly in industrial Ethernet architectures, including communication with compatible HMI, engineering, and automation components.
Existing S7-400 / PCS 7 Installations
The CPU is particularly relevant when maintaining an installed S7-400 architecture rather than redesigning an entire control system around a newer PLC platform.
Engineer’s Guide: Field Pitfalls
1. Do not confuse CPU 414-3 PN/DP with CPU 414-3.
The PN/DP version has integrated Ethernet/PROFINET functionality. Older CPU 414-3 variants without integrated Ethernet have different order numbers and system capabilities.
2. Check the exact order number.
6ES7414-3EM06-0AB0, 6ES7414-3EM07-0AB0, and earlier 6ES7 414-3EM0Y-0AB0 variants should not be treated as interchangeable solely because they share the “414-3 PN/DP” designation.
3. Check firmware before loading the project.
Siemens documentation identifies firmware V6.x for the EM06 generation. A project configured for a particular CPU/firmware combination should be reviewed in STEP 7 before commissioning.
4. Check the communication architecture.
If the machine uses PROFIBUS DP, verify the configured DP stations and bus parameters. If PROFINET is used, verify the configured device names, IP addresses, topology, and hardware configuration.
5. Do not assume a newer CPU is a zero-risk replacement.
The EM07 successor may be the logical procurement substitute, but the correct engineering decision depends on the installed STEP 7 project and connected hardware.
6. Test used or surplus CPUs.
For a legacy CPU, functional testing should include startup, memory retention, communication interfaces, diagnostics, and loading of a representative configuration. A visually clean CPU can still have degraded electronics or communication ports.
Frequently Asked Questions
What is Siemens 6ES7414-3EM06-0AB0?
It is a Siemens SIMATIC S7-400 CPU 414-3 PN/DP central processing unit designed for industrial PLC and process automation applications.
How much work memory does the CPU 414-3 PN/DP have?
The 6ES7414-3EM06-0AB0 has 4 MB of work memory, consisting of 2 MB code memory and 2 MB data memory.
Does it have PROFINET?
Yes. The CPU 414-3 PN/DP includes an integrated Ethernet/PROFINET interface.
Does it support PROFIBUS DP?
Yes. Its integrated MPI/DP interface supports PROFIBUS DP communication at rates up to 12 Mbit/s.
What software is used to program it?
The referenced Siemens product data specifies STEP 7 V5.5 or higher, with iMap-related engineering support for applicable configurations.
Is 6ES7414-3EM06-0AB0 obsolete?
It is a legacy/cancelled order number. Product lifecycle information identifies 6ES7414-3EM07-0AB0 as its substitute. For an operating plant, replacement should be evaluated against the actual STEP 7 project and installed hardware rather than based on the successor number alone.
Is 6ES7414-3EM07-0AB0 a replacement for 6ES7414-3EM06-0AB0?
Siemens lifecycle information lists the EM07 version as the substitute. Engineering verification is still required before installation because firmware and hardware configuration differences can affect an existing S7-400 application.
Procurement Note
For 6ES7414-3EM06-0AB0, the complete order number matters. When sourcing this CPU for an installed S7-400 system, request clear photographs of the nameplate, hardware revision, firmware version, and connectors when purchasing previously installed or surplus equipment.
For a direct replacement project, compare the existing CPU against the Siemens-approved successor 6ES7414-3EM07-0AB0, but do not treat the successor as an automatic drop-in substitute without checking the STEP 7 hardware configuration and communication architecture. Siemens documentation confirms the EM06 CPU as a CPU 414-3 PN/DP with 4 MB work memory and integrated MPI/DP plus Ethernet/PROFINET interfaces.
