Siemens SIMATIC S7 PLCs are widely used in industrial automation, machine control, manufacturing, process control and production systems. The S7-300, S7-400 and S7-1500 families include a wide range of CPU models designed for different automation, communication, performance and control requirements.
For industrial replacement, maintenance and procurement, identifying the correct Siemens CPU model and MLFB/part number is essential. The Siemens part number can be used to identify the required CPU when requesting a quotation, replacing an existing PLC, or sourcing a specific automation component.
AY Capital supplies and sources Siemens PLCs, CPUs and industrial automation products in Pakistan, including models from the S7-300, S7-400 and S7-1500 series. If the exact model you require is not listed, you can provide us with the Siemens part number, model number, photograph or technical specifications and our team can check sourcing options.
Siemens S7-300 PLC CPUs and Part Numbers
The Siemens SIMATIC S7-300 series is used across a wide range of industrial automation and machine-control applications. The series includes standard CPUs as well as CPU variants with integrated communication and failsafe functionality.
S7-300 CPU Models
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 312 | 6ES7312-1AE14-0AB0 |
| CPU 313C | 6ES7313-6BF03-0AB0 |
| CPU 313C-2 DP | 6ES7313-6CF03-0AB0 |
| CPU 314 | 6ES7314-1AG14-0AB0 |
| CPU 314C-2 PN/DP | 6ES7314-6EH04-0AB0 |
| CPU 315-2 DP | 6ES7315-2AH14-0AB0 |
| CPU 315-2 PN/DP | 6ES7315-2EH14-0AB0 |
| CPU 315F-2 PN/DP | 6ES7315-2FH14-0AB0 |
| CPU 317-2 DP | 6ES7317-2AK14-0AB0 |
| CPU 317-2 PN/DP | 6ES7317-2EK14-0AB0 |
| CPU 317F-2 PN/DP | 6ES7317-2FK14-0AB0 |
| CPU 319-3 PN/DP | 6ES7318-3EL01-0AB0 |
| CPU 319F-3 PN/DP | 6ES7318-3FL01-0AB0 |
The S7-300 range includes CPUs with different processing, communication and networking configurations. Models containing PN/DP support relevant PROFINET and PROFIBUS communication configurations, while F variants are associated with failsafe applications.
When replacing an S7-300 CPU, it is important to match the complete Siemens MLFB rather than relying only on the general CPU model name.
Siemens S7-400 PLC CPUs and Part Numbers
The SIMATIC S7-400 series is designed for larger and more demanding automation systems and has been used extensively in industrial plants, process applications and complex control systems.
S7-400 CPU Models
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 412-1 | 6ES7412-1XF04-0AB0 |
| CPU 412-2 | 6ES7412-2XG04-0AB0 |
| CPU 412-2 PN | 6ES7412-2EK06-0AB0 |
| CPU 414-2 | 6ES7414-2XG04-0AB0 |
| CPU 414-3 | 6ES7414-3XJ04-0AB0 |
| CPU 414-3 PN/DP | 6ES7414-3EM06-0AB0 |
| CPU 414F-3 PN/DP | 6ES7414-3FM06-0AB0 |
| CPU 414-4H | 6ES7414-4HJ04-0AB0 |
| CPU 416-2 | 6ES7416-2XK04-0AB0 |
| CPU 416F-2 | 6ES7416-2FK04-0AB0 |
| CPU 416-3 | 6ES7416-3XL04-0AB0 |
| CPU 416-3 PN/DP | 6ES7416-3ES06-0AB0 |
| CPU 416F-3 PN/DP | 6ES7416-3FS06-0AB0 |
| CPU 417-4 | 6ES7417-4XL04-0AB0 |
| CPU 417-4H | 6ES7417-4HL04-0AB0 |
| CPU 417-4 | 6ES7417-4XT05-0AB0 |
For S7-400 replacement requirements, the complete part number should be checked carefully because CPUs within the same family can have different communication, performance, redundancy or system configurations.
Siemens S7-1500 PLC CPUs and Part Numbers
The Siemens SIMATIC S7-1500 family is a modern PLC platform used for high-performance industrial automation and machine-control applications. The range includes standard, failsafe, compact and technology-oriented CPUs.
Standard S7-1500 CPU Models
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 1511-1 PN | 6ES7511-1AL03-0AB0 |
| CPU 1513-1 PN | 6ES7513-1AM03-0AB0 |
| CPU 1515-2 PN | 6ES7515-2AN03-0AB0 |
| CPU 1516-3 PN/DP | 6ES7516-3AP03-0AB0 |
| CPU 1517-3 PN/DP | 6ES7517-3AP00-0AB0 |
| CPU 1518-4 PN/DP | 6ES7518-4AP00-0AB0 |
S7-1500 Failsafe CPU Models
S7-1500 failsafe CPUs are designed for automation systems where safety-related control functions are required.
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 1511F-1 PN | 6ES7511-1FL03-0AB0 |
| CPU 1513F-1 PN | 6ES7513-1FM03-0AB0 |
| CPU 1515F-2 PN | 6ES7515-2FN03-0AB0 |
| CPU 1516F-3 PN/DP | 6ES7516-3FP03-0AB0 |
| CPU 1517F-3 PN/DP | 6ES7517-3FP01-0AB0 |
S7-1500 Compact CPUs
The S7-1500 range also includes compact CPU models that combine PLC functionality with additional integrated features.
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 1511C-1 PN | 6ES7511-1CK01-0AB0 |
| CPU 1512C-1 PN | 6ES7512-1CK01-0AB0 |
S7-1500 Technology and Technology/Failsafe CPUs
Technology CPUs are used for applications involving more specialized motion and technology-control requirements.
| CPU / Model | Siemens Part Number / MLFB |
|---|---|
| CPU 1511T-1 PN | 6ES7511-1TK01-0AB0 |
| CPU 1515T-2 PN | 6ES7515-2TM01-0AB0 |
| CPU 1517T-3 PN/DP | 6ES7517-3TP00-0AB0 |
| CPU 1517TF-3 PN/DP | 6ES7517-3UP00-0AB0 |
How to Identify the Correct Siemens PLC CPU
When sourcing a Siemens PLC CPU, the CPU family and model are useful starting points, but the complete Siemens MLFB/part number is usually the most useful reference for identifying the exact product.
For example:
CPU 315-2 PN/DP
Siemens MLFB: 6ES7315-2EH14-0AB0
Similarly:
CPU 1515-2 PN
Siemens MLFB: 6ES7515-2AN03-0AB0
Providing the complete part number helps reduce the possibility of receiving a different hardware version or configuration within the same CPU family.
Before ordering a replacement CPU, it is also useful to provide:
- Siemens part number / MLFB
- CPU model
- Series name
- Existing PLC photograph
- Hardware or product version
- Required quantity
- Application or machine information, where relevant
Siemens PLC CPUs for Industrial Automation in Pakistan
AY Capital supplies and sources Siemens automation products and PLC components in Pakistan for manufacturers, factories, engineering companies, machine builders, maintenance departments and industrial procurement teams.
Our sourcing capabilities cover PLC CPUs, PLC modules, automation components, electrical products, instrumentation, pneumatic products, hydraulic equipment and other industrial supplies.
We can source products based on:
- Siemens MLFB / part number
- Manufacturer and model
- Product photograph
- Technical specifications
- Existing equipment details
- Required quantity
- Application requirements
If you are looking for an S7-300, S7-400 or S7-1500 CPU, send us the Siemens part number or model you require and our team can check the available sourcing options.
Frequently Asked Questions
1. What is a Siemens PLC MLFB number?
An MLFB is Siemens’ product identification/order number used to identify a specific product configuration. For PLC CPUs, the complete MLFB can distinguish between different CPU versions and configurations.
2. Can AY Capital source Siemens S7 PLC CPUs in Pakistan?
Yes. AY Capital supplies and sources Siemens PLCs and industrial automation products for customers across Pakistan. You can provide the required CPU model or Siemens MLFB for sourcing.
3. What is the difference between Siemens S7-300, S7-400 and S7-1500?
They are different Siemens SIMATIC PLC families designed for different generations and types of industrial automation systems. The specific CPU, communication requirements, system architecture and application should be considered when selecting a replacement.
4. Can I request a Siemens CPU using only the part number?
Yes. Providing the complete Siemens MLFB/part number is one of the most useful ways to identify the exact CPU required. You can also provide the model number and a photograph of the existing unit.
5. What if my Siemens PLC CPU is not listed here?
The list above is not intended to represent every Siemens PLC CPU. If your required Siemens CPU or MLFB is not listed, send AY Capital the part number, model, photograph or technical specifications, and our team can check sourcing options.
Need a Siemens PLC CPU?
Looking for a specific Siemens S7-300, S7-400 or S7-1500 CPU in Pakistan? Send us the Siemens MLFB/part number, model number or a photograph of the required PLC.
AY Capital can assist with sourcing Siemens PLC CPUs and other industrial automation products for businesses across Pakistan.