SIEMENS 6ES7313-5BG04-0AB0 Compact CPU with MPI | Replacement, Equivalent & Selection Guide
The SIEMENS 6ES7313-5BG04-0AB0 is a compact CPU module from the SIMATIC S7-300 series, featuring an integrated MPI (Multi-Point Interface) communication port. Designed for mid-range automation tasks, it combines onboard digital I/O with a powerful processing core, making it a widely deployed controller in manufacturing, process, and infrastructure applications worldwide.
Whether you are sourcing a replacement for a failed unit, evaluating a functionally equivalent alternative due to obsolescence, or comparing cross-brand substitutes for a new project, this guide provides the technical detail and selection criteria you need to make a confident procurement decision.
Technical Specifications
| Parameter | Value | Selection Impact |
|---|---|---|
| Part Number | 6ES7313-5BG04-0AB0 | — |
| Series | SIMATIC S7-300 | ★ Critical for rack compatibility |
| CPU Type | CPU 313C (Compact) | ★ Determines onboard I/O availability |
| Work Memory | 128 KB | ★ Must match or exceed for program migration |
| Load Memory | Up to 8 MB (MMC) | Expandable via Micro Memory Card |
| Processing Speed (Bit) | 0.1 µs/instruction | ★ Key for real-time control loops |
| Onboard Digital Inputs | 24 × DI (24 VDC) | ★ Eliminates need for separate DI module |
| Onboard Digital Outputs | 16 × DO (24 VDC, 0.5 A) | ★ Eliminates need for separate DO module |
| Onboard Counting Channels | 3 × 30 kHz | Encoder/pulse input support |
| Communication Interface | MPI (187.5 kbps – 12 Mbps) | ★ Must match existing network topology |
| Power Supply Voltage | 24 VDC (via backplane) | — |
| Operating Temperature | 0 °C to +60 °C | Verify for harsh environments |
| Dimensions (W×H×D) | 80 × 125 × 130 mm | ★ Rack slot footprint must match |
| Weight | ~500 g | — |
| Firmware Version | V3.3 (04 revision) | ★ Confirm compatibility with STEP 7 version |
| Protection Class | IP20 | — |
| Certifications | CE, UL, cULus, ATEX (Zone 2) | Verify for regulated industries |
Compatible Replacement & Equivalent Models
Selecting a replacement requires matching the critical parameters marked ★ above. Below are three categories of alternatives, each with specific conditions and caveats.
1. Direct Drop-in Replacements (Same Form, Fit & Function)
- 6ES7313-5BG04-0AB0 (same revision) — Identical unit; confirm firmware revision matches existing installation.
- 6ES7313-5BF03-0AB0 — Previous hardware revision (03); functionally equivalent for most applications but verify MMC compatibility and STEP 7 version ≥ V5.4.
2. Functional Equivalents (Same Function, Different Model)
- 6ES7314-1AG14-0AB0 (CPU 314) — Higher work memory (192 KB), no onboard I/O; requires separate DI/DO modules. Suitable when program size exceeds 128 KB.
- 6ES7315-2AH14-0AB0 (CPU 315-2 DP) — Adds PROFIBUS-DP port; use when migrating to DP network. Larger footprint (2 slots).
- 6ES7313-6CG04-0AB0 (CPU 313C-2 DP) — Same compact form with additional PROFIBUS-DP interface; direct functional upgrade with backward program compatibility.
3. Cross-Brand Alternatives (Third-Party Substitutes)
- Allen-Bradley 1769-L24ER-QB1B (CompactLogix) — Different architecture and programming environment (Studio 5000); not a drop-in substitute. Requires full I/O rewiring and program rewrite. Suitable only for greenfield projects.
- Mitsubishi MELSEC Q03UDE — Comparable processing performance; incompatible rack, wiring, and software. Requires complete system redesign.
- Schneider Electric Modicon M340 (BMX P34 2020) — Functional substitute for new installations; Unity Pro programming environment. Not backward compatible with STEP 7 projects.
⚠ Note: Cross-brand alternatives are not plug-and-play substitutes. Always consult Konmask engineers before specifying a cross-brand replacement in an existing installation.
Why Choose the Original Model
- Precision & Performance: Factory-calibrated 0.1 µs bit processing ensures deterministic cycle times critical for high-speed control loops.
- OEM Certifications: CE, UL, cULus, and ATEX Zone 2 certifications are tied to the original part number — third-party substitutes may not carry equivalent approvals for regulated industries.
- Seamless Compatibility: Guaranteed backward compatibility with SIMATIC S7-300 racks, power supplies, and all existing SM/FM/CP modules without hardware modification.
- STEP 7 & TIA Portal Support: Full support for STEP 7 V5.x and TIA Portal V13+ ensures zero reprogramming effort when replacing a like-for-like unit.
- Warranty & Traceability: Genuine units supplied by Konmask include full manufacturer traceability, serial number verification, and warranty documentation.
- Long-Term Technical Support: SIEMENS extended support and Konmask post-sale technical assistance ensure rapid resolution of integration issues.
Typical Applications
- Automotive Manufacturing: Body-in-white welding lines requiring high-speed DI/DO response and precise cycle time control.
- Food & Beverage Processing: Conveyor sequencing, filling machine control, and CIP (Clean-in-Place) automation in hygienic environments.
- Water & Wastewater Treatment: Pump station control, dosing systems, and SCADA-integrated monitoring via MPI/PROFIBUS.
- Pharmaceutical Production: Batch process control under GMP compliance, leveraging ATEX Zone 2 certification for solvent-handling areas.
- Building Automation & HVAC: Central plant control for chillers, AHUs, and BMS integration via MPI network.
- Machine Tool & Packaging: Servo axis coordination, pick-and-place sequencing, and high-frequency counting via onboard 30 kHz counter channels.
System Compatibility
The 6ES7313-5BG04-0AB0 is designed for use within the SIMATIC S7-300 ecosystem. Verified compatible components include:
- 6ES7307-1BA01-0AA0 — PS 307 5A Power Supply Module (24 VDC, 5 A)
- 6ES7390-1AE80-0AA0 — S7-300 DIN Rail (480 mm) for rack mounting
- 6ES7321-1BL00-0AA0 — SM 321 Digital Input Module (32 × DI, 24 VDC)
- 6ES7322-1BL00-0AA0 — SM 322 Digital Output Module (32 × DO, 24 VDC)
- 6ES7331-7KF02-0AB0 — SM 331 Analog Input Module (8 × AI)
- 6ES7332-5HF00-0AB0 — SM 332 Analog Output Module (8 × AO)
- 6ES7953-8LJ31-0AA0 — Micro Memory Card (MMC) 512 KB for program storage
- 6GK7343-1EX30-0XE0 — CP 343-1 Ethernet Communication Processor for Industrial Ethernet integration
Selection Guide
Answer these three questions to confirm the right module for your application:
-
Is your existing rack a SIMATIC S7-300 platform?
If yes → the 6ES7313-5BG04-0AB0 is a direct drop-in replacement. If no → contact Konmask to evaluate cross-brand migration options. -
Does your program require more than 128 KB work memory?
If yes → consider upgrading to CPU 314 (6ES7314-1AG14-0AB0) or CPU 315. If no → the 6ES7313-5BG04-0AB0 is sufficient. -
Do you need PROFIBUS-DP in addition to MPI?
If yes → the CPU 313C-2 DP (6ES7313-6CG04-0AB0) is the recommended equivalent upgrade. If no → the standard 6ES7313-5BG04-0AB0 meets your communication requirements.
Not sure? Contact Konmask engineers with your rack configuration and program size — we’ll confirm the correct replacement within 24 hours.
Quality Assurance & Sourcing
Konmask sources the 6ES7313-5BG04-0AB0 exclusively through authorized SIEMENS distribution channels and verified industrial surplus networks. Every unit undergoes a 4-step inspection process before shipment:
- Visual Inspection: Housing integrity, label authenticity, connector condition, and absence of counterfeit indicators.
- Serial Number Verification: Cross-referenced against SIEMENS manufacturer database to confirm genuine origin and production date.
- Functional Power-On Test: CPU boot sequence, memory self-test, and MPI communication handshake verified on SIMATIC test bench.
- Packaging & Documentation: Anti-static packaging, humidity indicator card, and full documentation pack prepared for shipment.
Available documentation upon request: Certificate of Conformity (CoC), Test Report, SIEMENS Product Datasheet, and Export Control Classification (ECC).
How to Order
- Submit Your Inquiry: Email [email protected] or call +0086 19859288691 with your part number, required quantity, and delivery timeline.
- Receive Quotation & Confirmation: Konmask will respond within 24 hours with pricing, lead time, and available stock confirmation. Technical pre-sales support is included at no charge.
- Place Order & Ship: Upon order confirmation, units are inspected, packed, and dispatched with full tracking. Express and freight options available for urgent replacement needs.
Replacement & Compatibility FAQ
Q1: Can the 6ES7313-5BF03-0AB0 directly replace the 6ES7313-5BG04-0AB0?
A: In most cases, yes. The BF03 revision is functionally equivalent to the BG04 for standard S7-300 applications. However, confirm your STEP 7 version is ≥ V5.4 and that the Micro Memory Card (MMC) is compatible. For safety-critical installations, Konmask recommends using the exact same revision as the original unit.
Q2: Is the 6ES7313-5BG04-0AB0 compatible with TIA Portal, or only STEP 7?
A: The CPU 313C is fully supported in STEP 7 V5.x. TIA Portal V13 and later also support S7-300 CPUs in compatibility mode. If you are migrating to TIA Portal, Konmask can advise on the recommended equivalent CPU that offers native TIA Portal support.
Q3: What is the best substitute if the 6ES7313-5BG04-0AB0 is discontinued or unavailable?
A: The closest functional equivalent within the S7-300 family is the 6ES7313-6CG04-0AB0 (CPU 313C-2 DP), which adds a PROFIBUS-DP port while maintaining the same compact form factor, onboard I/O count, and program compatibility. For applications requiring migration to a current-generation platform, Konmask can evaluate SIMATIC S7-1200 or S7-1500 equivalents based on your specific I/O and communication requirements.
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