SIEMENS 6ES7315-1AF03-0AB0 Simatic S7-300 CPU 315 | Replacement, Equivalent & Selection Guide
The SIEMENS 6ES7315-1AF03-0AB0 is a mid-range CPU module from the SIMATIC S7-300 programmable logic controller (PLC) family. Designed for demanding industrial automation tasks, it delivers reliable performance in manufacturing, process control, and machine automation environments. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make informed decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens AG |
| Part Number | 6ES7315-1AF03-0AB0 |
| Product Family | SIMATIC S7-300 |
| CPU Type | CPU 315 |
| Work Memory | 48 KB |
| Load Memory | Integrated 96 KB RAM; expandable via Memory Card (max. 512 KB) |
| Processing Speed (Bit) | 0.3 µs / instruction |
| Processing Speed (Word) | 0.6 µs / instruction |
| Max. Digital I/O | 1,024 DI / 1,024 DO |
| Max. Analog I/O | 256 AI / 256 AO |
| Communication Interface | MPI (Multi-Point Interface) |
| MPI Data Rate | 187.5 Kbps |
| Timers / Counters | 256 / 256 |
| Supply Voltage | DC 24 V |
| Power Consumption | Approx. 1.5 W |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Dimensions (W×H×D) | 40 × 125 × 130 mm |
| Weight | Approx. 600 g |
| Protection Class | IP20 |
| Certifications | CE, UL, cULus, FM |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as direct or functional replacements for the 6ES7315-1AF03-0AB0. Always verify firmware compatibility and I/O requirements before substitution.
| Part Number | Description | Compatibility Notes |
|---|---|---|
| 6ES7315-2AG10-0AB0 | CPU 315-2 DP (with PROFIBUS DP) | Drop-in upgrade; adds PROFIBUS DP master/slave interface |
| 6ES7315-2EH14-0AB0 | CPU 315-2 PN/DP | Adds PROFINET + PROFIBUS; recommended for new projects |
| 6ES7314-1AG14-0AB0 | CPU 314 | Lower-spec alternative; reduced work memory (96 KB) |
| 6ES7316-2AG00-0AB0 | CPU 316-2 DP | Higher-spec upgrade; larger memory and faster processing |
| 6ES7317-2AK14-0AB0 | CPU 317-2 DP | High-end replacement; suitable for complex multi-axis control |
| 6ES7318-3EL01-0AB0 | CPU 319-3 PN/DP | Top-tier S7-300 CPU; maximum memory and I/O capacity |
Note: Cross-referencing requires validation of program memory, I/O count, and communication protocol requirements. Contact Konmask technical support for application-specific guidance.
Why Choose the Original Model
- Proven Reliability: The 6ES7315-1AF03-0AB0 has a long field history in industrial environments with documented MTBF performance.
- Direct Replacement: Ideal for maintenance and repair of existing S7-300 installations without reprogramming or hardware redesign.
- Cost-Effective: Lower acquisition cost compared to newer PN/DP variants when PROFIBUS or PROFINET is not required.
- Spare Parts Availability: Widely stocked as a legacy spare; Konmask maintains verified inventory for rapid dispatch.
- STEP 7 Compatible: Fully supported by Siemens STEP 7 V5.x programming software — no migration required.
Typical Applications
- Discrete manufacturing automation (assembly lines, stamping, welding)
- Conveyor and material handling systems
- Packaging machinery and filling lines
- Water and wastewater treatment plant control
- HVAC and building automation systems
- Textile and printing machine control
- Retrofit and modernization of legacy S7-300 installations
System Compatibility
- Rack: SIMATIC S7-300 standard rail (e.g., 6ES7390-1AE80-0AA0)
- Power Supply: PS 307 series (e.g., 6ES7307-1BA01-0AA0, 6ES7307-1EA01-0AA0)
- Signal Modules: All standard S7-300 SM 321/322/323/331/332/334 series
- Communication Modules: CP 342, CP 343 series (via MPI backplane)
- Programming Software: Siemens STEP 7 V5.4 and above (SIMATIC Manager)
- HMI: SIMATIC TP/OP panels via MPI; WinCC via MPI/OPC
- Memory Card: Siemens MMC (Micro Memory Card) — 6ES7953-8Lxx0-0AA0 series
Selection Guide
Use the decision criteria below to determine whether the 6ES7315-1AF03-0AB0 is the right choice or whether an alternative model better fits your application:
| Requirement | Recommended Model |
|---|---|
| MPI only, ≤48 KB work memory, cost-sensitive | 6ES7315-1AF03-0AB0 ✓ (this product) |
| Need PROFIBUS DP master/slave | 6ES7315-2AG10-0AB0 (CPU 315-2 DP) |
| Need PROFINET + PROFIBUS | 6ES7315-2EH14-0AB0 (CPU 315-2 PN/DP) |
| Smaller program, budget-constrained | 6ES7314-1AG14-0AB0 (CPU 314) |
| Large I/O count (>1,024 points) or complex logic | 6ES7317-2AK14-0AB0 (CPU 317-2 DP) |
| Maximum performance, future-proof | 6ES7318-3EL01-0AB0 (CPU 319-3 PN/DP) |
Quality Assurance & Sourcing
- Authenticity: All units sourced from authorized distributors or verified surplus channels; each unit undergoes visual and functional inspection.
- Testing: Power-on test and firmware version verification performed prior to shipment.
- Packaging: Anti-static ESD packaging with original or equivalent protective foam insert.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 days.
- Traceability: Batch records and supplier documentation available upon request for regulated industries.
How to Order
- Confirm the part number: 6ES7315-1AF03-0AB0
- Specify quantity and required delivery timeline.
- Add to cart directly, or contact us for bulk pricing and lead time confirmation.
- For OEM/system integrator accounts, request a formal quotation via email.
- Payment: T/T, PayPal, credit card, and trade assurance accepted.
📧 Email: support@konmask.com
📞 Phone/WhatsApp: +0086 19859288691
🌐 Website: https://Konmask.com
Replacement & Compatibility FAQ
Q: Can I replace 6ES7315-1AF03-0AB0 with 6ES7315-2AG10-0AB0 directly?
A: Yes, the CPU 315-2 DP is a functional superset. Your existing STEP 7 program can be loaded without modification; the additional PROFIBUS port can remain unused.
Q: Is the 6ES7315-1AF03-0AB0 still in production?
A: This model has been discontinued by Siemens. Konmask supplies verified new-old-stock (NOS) and refurbished units for maintenance and replacement purposes.
Q: What memory card is compatible?
A: Siemens Micro Memory Card (MMC) — 6ES7953-8Lxx0-0AA0 series (64 KB to 8 MB). The card is required for program backup and retentive data storage.
Q: Can this CPU communicate with S7-1200 or S7-1500?
A: Direct S7 communication via MPI is possible using PUT/GET instructions. For PROFINET-based integration, a CP 343-1 communication processor is required.
Q: What is the difference between 6ES7315-1AF03-0AB0 and 6ES7315-1AF01-0AB0?
A: The -0AB0 suffix denotes the hardware revision. The -1AF03 revision includes minor firmware improvements over -1AF01; both are functionally interchangeable in most applications.
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