Industrial Automation Solution – SIEMENS 6ES5926-3KA12 | CPU926 Series
Where This Product Is Used
The SIEMENS 6ES5926-3KA12 CPU926 circuit board is the central processing unit of the SIMATIC S5-115U programmable logic controller (PLC) family. It is deployed across a wide range of demanding industrial environments where reliable, deterministic control is non-negotiable:
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, and assembly transfer systems requiring precise sequencing and high-speed I/O response.
- Chemical & Petrochemical Plants: Continuous process control loops, reactor management, and safety interlock systems where uptime is critical.
- Power Generation & Utilities: Turbine governor control, switchgear automation, and substation SCADA integration.
- Food & Beverage Processing: Batch recipe management, filling line synchronization, and CIP (Clean-In-Place) cycle control.
- Water & Wastewater Treatment: Pump station sequencing, dosing control, and remote telemetry in distributed SCADA architectures.
- Steel & Metal Processing: Rolling mill drives, furnace temperature profiling, and coil handling automation.
- Pharmaceutical Production: GMP-compliant batch processing, validated control loops, and audit-trail-ready automation.
Technical Specifications
| Part Number | 6ES5926-3KA12 |
| Series | SIMATIC S5 / CPU926 |
| Compatible PLC | SIEMENS S5-115U |
| Module Type | CPU Circuit Board (Processor Module) |
| Manufacturer | SIEMENS AG |
| Memory | Integrated RAM/ROM for program and data storage |
| Communication Interface | SINEC H1 / L1 compatible (via expansion) |
| Programming Language | STEP 5 (STL, LAD, FBD) |
| Operating Voltage | 24 V DC (via backplane bus) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Weight | 1,790 g |
| Form Factor | S5 Subrack plug-in board |
| Condition | Used / Refurbished (Tested & Verified) |
Why Engineers Specify This Model
- Proven S5 Platform Reliability: The SIMATIC S5-115U with CPU926 has accumulated decades of field-proven operation in mission-critical installations worldwide — a track record no new platform can replicate overnight.
- High-Speed Cycle Time: The CPU926 delivers fast program scan cycles, enabling tight real-time control of high-speed machinery and process loops.
- Large Program Capacity: Supports extended user program memory, accommodating complex ladder logic and function block programs without external memory cards on many configurations.
- Backward Compatibility: Drop-in replacement for existing S5-115U installations — no rewiring, no re-engineering, no revalidation of the entire system.
- STEP 5 Ecosystem: Fully compatible with existing STEP 5 programming tools, enabling maintenance teams to service the module without retraining.
- Cost-Effective Maintenance: Sourcing a verified 6ES5926-3KA12 replacement extends the operational life of legacy S5 systems at a fraction of the cost of a full migration to S7 or TIA Portal.
Complete System Bill of Materials
For a fully operational SIMATIC S5-115U control system using the 6ES5926-3KA12 CPU, engineers typically specify the following companion components:
- SIEMENS 6ES5095-8MA02 — S5-115U Central Controller Rack
- SIEMENS 6ES5955-3LC41 — Power Supply Module (PS955)
- SIEMENS 6ES5375-1LA21 — Memory Submodule (EPROM)
- SIEMENS 6ES5470-8MA12 — Digital Output Module (DO32)
- SIEMENS 6ES5430-8MA11 — Digital Input Module (DI32)
- SIEMENS 6ES5460-4UA13 — Analog Input Module (AI8)
- SIEMENS 6ES5700-8MA11 — Interface Module (IM)
- SIEMENS 6ES5734-3BD20 — SINEC L2 Communication Processor
Contact Konmask.com for bundle pricing on complete S5-115U system builds.
Compliance & Industry Standards
- CE Marking: Compliant with EU Machinery Directive and EMC Directive requirements applicable at time of manufacture.
- UL Listed: Recognized under applicable UL industrial control equipment standards.
- IEC 61131-2: Programmable controllers — hardware requirements.
- ATEX / IECEx: Not rated for Zone 0/1 hazardous areas in standard configuration; consult for Ex-rated enclosure solutions.
- RoHS: Legacy product manufactured prior to RoHS Directive; consult for compliance documentation requirements in your jurisdiction.
Quality Assurance & Sourcing
Every 6ES5926-3KA12 unit shipped from Konmask.com undergoes a structured inspection and verification process:
- ✔ Visual inspection for physical damage, corrosion, and component integrity
- ✔ Power-on functional test on S5-115U test bench
- ✔ STEP 5 communication handshake verification
- ✔ Firmware version and hardware revision documented
- ✔ Anti-static packaging with humidity indicator card
- ✔ Traceable sourcing from decommissioned OEM installations or authorized surplus channels
How to Source This Part
Konmask.com maintains stock of hard-to-find SIEMENS S5 legacy components for immediate dispatch. To order the 6ES5926-3KA12:
- Online: Add to cart directly on this page — secure checkout with DHL / FedEx international shipping.
- Email RFQ: support@konmask.com — include your required quantity, delivery timeline, and any hardware revision preferences.
- Phone / WhatsApp: +0086 19859288691 — speak directly with a SIEMENS S5 parts specialist.
- Bulk Orders: Volume pricing available for MRO stockrooms, system integrators, and OEM service depots.
Application-Specific FAQ
Q: Is the 6ES5926-3KA12 a direct replacement for the 6ES5926-3SA11?
A: The -3KA12 and -3SA11 are different hardware revisions with distinct memory configurations. Verify your existing CPU order number and hardware revision before ordering. Contact us for cross-reference assistance.
Q: Can this CPU run STEP 7 programs?
A: No. The S5-115U CPU926 is exclusively programmed with STEP 5 software. STEP 7 is for the SIMATIC S7 platform. Migration tools (e.g., S5–S7 Converter) exist but require engineering effort.
Q: What is the maximum I/O capacity supported by this CPU?
A: The S5-115U with CPU926 supports up to 1,024 digital I/O points and 128 analog channels depending on rack and module configuration.
Q: Do you provide a warranty on refurbished units?
A: Yes. Konmask.com provides a 90-day functional warranty on all tested and verified legacy PLC modules. Extended warranty options are available — contact us for details.
Q: Can you source specific hardware revisions on request?
A: We maintain records of hardware revisions in our inventory. Submit your revision requirement via email RFQ and we will confirm availability before invoicing.
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Contact: support@konmask.com | +0086 19859288691
