SIEMENS 6ES7313-5BF03-0AB0 – Compact CPU with Integrated I/O | SIMATIC S7-300 Platform
Engineering Background
The SIMATIC S7-300 series has been the backbone of mid-range industrial automation for over two decades, deployed across discrete manufacturing, process control, and infrastructure applications worldwide. The 6ES7313-5BF03-0AB0 is a compact CPU variant within this proven platform, integrating onboard digital I/O to reduce panel footprint and wiring complexity — a critical advantage in retrofit and space-constrained installations.
Product Positioning
Designed for procurement engineers sourcing reliable, specification-verified automation components, this CPU module delivers deterministic scan-cycle performance with native PROFIBUS DP master capability. It is the preferred choice for OEM machine builders and system integrators requiring a cost-effective yet fully capable S7-300 CPU with integrated I/O for standalone or networked control architectures.
Complete Technical Specifications
| Order Number | 6ES7313-5BF03-0AB0 |
| Series / Platform | SIMATIC S7-300 |
| CPU Type | Compact CPU with integrated I/O |
| Working Memory | 128 KB (for code and data) |
| Load Memory | Integrated 128 KB Flash EPROM; expandable via MMC up to 8 MB |
| Integrated Digital Inputs | 24 × DI (24 V DC) |
| Integrated Digital Outputs | 16 × DO (24 V DC, 0.5 A) |
| Processing Speed (Bit) | 0.1 µs per instruction |
| Processing Speed (Word) | 0.2 µs per instruction |
| Timers / Counters | 256 / 256 |
| Communication Interface | MPI (187.5 kbps); integrated PROFIBUS DP master (12 Mbps) |
| Max. DP Slaves | 32 (via integrated DP master) |
| Supply Voltage | 24 V DC (via backplane bus) |
| Power Consumption | Approx. 2.5 W (CPU only) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 10% to 95% (non-condensing) |
| Protection Class | IP20 |
| Dimensions (W × H × D) | 80 × 125 × 130 mm |
| Weight | Approx. 900 g |
| Certifications | CE, UL, cULus, ATEX (Zone 2) |
| Programming Software | STEP 7 V5.x / TIA Portal (via legacy support) |
| Firmware Version | V3.3 (BF03 revision) |
Proven Application Environments
- Discrete Manufacturing: Assembly line sequencing, conveyor control, and machine interlocking where compact panel design is mandatory.
- Automotive OEM: Body-in-white welding cells and paint shop automation requiring deterministic cycle times under 10 ms.
- Water & Wastewater: Pump station control with PROFIBUS DP integration to remote I/O and field instruments.
- Building Automation: HVAC and access control systems leveraging MPI networking for multi-CPU coordination.
- Food & Beverage: Hygienic machine control with IP20 enclosure in sealed control cabinets meeting EHEDG guidelines.
- Infrastructure Retrofit: Drop-in replacement for earlier 313-5BE00/BE01/BE02 variants with backward-compatible program migration.
Engineering Advantages
- Integrated I/O eliminates expansion modules for small-to-mid I/O counts, reducing BOM cost and panel wiring by up to 30%.
- Dual-port communication (MPI + PROFIBUS DP master) enables simultaneous programming access and field network management without additional CP modules.
- MMC-based program retention ensures zero data loss on power cycle — no battery required for program storage.
- BF03 firmware revision resolves known diagnostic buffer overflow issues present in BF00/BF01 variants, improving long-term reliability in 24/7 operations.
- S7-300 ecosystem compatibility provides access to 300+ certified signal modules, function modules, and communication processors on the same backplane.
- STEP 7 and TIA Portal support protects existing engineering investment while enabling migration pathways to modern toolchains.
System Architecture & Signal Flow
The 6ES7313-5BF03-0AB0 mounts on a standard S7-300 DIN-rail rack (e.g., UR1/UR2) in Slot 2, adjacent to the PS 307 power supply in Slot 1. The integrated 24 DI / 16 DO are addressed as process image inputs/outputs (PIQ/PII) in the default I/O address range, configurable via HW Config in STEP 7.
The MPI interface (default address 2, 187.5 kbps) connects to the PG/PC for online programming and diagnostics. The integrated PROFIBUS DP master port (default address 2 on DP bus) supports up to 32 DP slaves — including ET 200S/M/SP distributed I/O, SINAMICS drives, and third-party DP devices — at line speeds up to 12 Mbps. Signal flow: Field sensors → DI terminals → CPU process image → User program (OB1/interrupt OBs) → DO process image → Actuator outputs.
Sourcing & Quality Verification
- Origin: Genuine SIEMENS production; traceable to authorized distribution channels.
- Inspection: Each unit undergoes visual inspection, label authenticity verification, and functional power-on test prior to dispatch.
- Packaging: Original SIEMENS anti-static packaging with intact factory seals where applicable; refurbished units clearly marked and tested to OEM specification.
- Documentation: Certificate of conformity and test report available upon request for project documentation and FAT/SAT requirements.
- Warranty: 12-month Konmask operational warranty covering manufacturing defects and functional failure under normal operating conditions.
Procurement Process
- Confirm specification: Verify firmware revision (BF03) and I/O count match your project BOM. Cross-reference with SIEMENS SIOS portal order number 6ES7313-5BF03-0AB0.
- Request quotation: Contact support@konmask.com or call +0086 19859288691 for volume pricing, lead time confirmation, and freight terms (EXW/CIF/DAP).
- Place order: Purchase directly via Konmask.com checkout or submit a formal PO for B2B net-term arrangements.
- Inspection & dispatch: Units are tested, documented, and dispatched within 1–3 business days. Tracking provided via email.
- Technical support: Post-delivery commissioning support available via email or video call for integration queries.
Technical FAQ
Q: Is the 6ES7313-5BF03-0AB0 compatible with TIA Portal?
A: Direct TIA Portal programming is not supported; however, STEP 7 V5.6 SP2 or later can be used, and existing programs can be migrated to S7-1500 via the TIA Portal migration tool if an upgrade path is planned.
Q: Can I replace a 6ES7313-5BE03-0AB0 with this unit?
A: Yes. The BF03 variant is a direct hardware replacement for BE03 with identical I/O count and pinout. Firmware differences are transparent to the user program.
Q: Does this CPU require a battery for program retention?
A: No. Program and data retention is handled by the Micro Memory Card (MMC). A battery is only required if real-time clock retention during extended power loss is needed.
Q: What is the maximum number of S7-300 modules on one rack?
A: Up to 8 signal/function modules per rack (Slots 4–11), with up to 4 racks expandable via IM 360/361 interface modules.
Q: Is PROFIBUS DP master functionality included without additional CP modules?
A: Yes. The integrated DP master port is built into the CPU and requires no additional hardware. Configure DP slaves directly in HW Config under the CPU’s DP master system.
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Contact: support@konmask.com | +0086 19859288691
