YOKOGAWA F3SP28-3S CPU Module | Replacement, Equivalent & Selection Guide
The YOKOGAWA F3SP28-3S is a high-performance CPU Module designed for the FA-M3 Range-free Multi-controller series. Engineered for demanding industrial automation environments, this processor unit delivers reliable real-time control, flexible I/O expansion, and seamless integration within YOKOGAWA’s proven FA-M3 architecture. At Konmask.com, we help engineers and procurement teams identify the right module — whether original, equivalent, or upgraded replacement.
Technical Specifications
- Model: F3SP28-3S
- Manufacturer: YOKOGAWA Electric Corporation
- Series: FA-M3 Range-free Multi-controller
- Module Type: CPU Module (Sequence CPU)
- Program Memory: 28K steps (ladder logic)
- Data Memory: Internal data registers, retentive memory supported
- Communication Ports: RS-232C (loader port); optional Ethernet via expansion
- I/O Points: Up to 2,048 I/O points (with expansion modules)
- Scan Time: High-speed sequence execution
- Power Supply: Supplied via FA-M3 base unit
- Operating Temperature: 0°C to 55°C
- Weight: Approx. 290 g
- Compliance: CE, UL, cUL (subject to lot verification)
Compatible Replacement & Equivalent Models
When the F3SP28-3S is discontinued, hard to source, or requires an upgrade, the following models are commonly evaluated as replacements or equivalents:
- F3SP22-0S — Entry-level FA-M3 CPU; fewer program steps, suitable for simpler applications
- F3SP28-3N — Near-equivalent with different communication suffix; verify firmware compatibility
- F3SP35-5N — Upgraded CPU with larger memory and faster scan; drop-in form factor for most FA-M3 bases
- F3SP38-6N — Higher-end replacement with Ethernet built-in; recommended for network-integrated systems
- F3SP53-4H / F3SP58-6H — High-speed variants for motion-critical or multi-axis applications
Note: Always verify base unit slot compatibility, firmware version, and I/O module addressing before substituting CPU modules. Contact our technical team for a free compatibility check.
Why Choose the Original Model
- Proven Reliability: F3SP28-3S has an established track record in process and factory automation across Asia-Pacific and global installations.
- Zero Re-engineering: Drop-in replacement for existing FA-M3 systems — no base unit modification required.
- Validated Firmware: Original units ship with factory-validated firmware, eliminating compatibility risk.
- Spare Parts Continuity: Maintaining original model numbers simplifies MRO procurement and spare parts management.
- Warranty & Traceability: Genuine units sourced through Konmask.com include full traceability documentation.
Typical Applications
- Chemical and petrochemical plant process control
- Pharmaceutical batch manufacturing automation
- Food & beverage production line sequencing
- Water treatment and utility management systems
- Semiconductor and electronics manufacturing
- Power generation and substation automation
- General discrete and continuous process control
System Compatibility
The F3SP28-3S is compatible with the following FA-M3 system components:
- Base Units: F3BU04-0N, F3BU06-0N, F3BU13-0N, F3BU16-0N (4/6/13/16-slot bases)
- Power Supply Modules: F3PU20-0S, F3PU30-0S
- I/O Modules: All FA-M3 series digital and analog I/O modules (F3XD, F3YD, F3AD, F3DA families)
- Communication Modules: F3LE01-5T (Ethernet), F3LC11-1F (FL-net), F3LP02-0N (PROFIBUS)
- Programming Software: YOKOGAWA WideField3 (ToolBox for FA-M3)
Selection Guide
Use this guide to determine whether F3SP28-3S is the right CPU for your application:
- Program size ≤ 28K steps? → F3SP28-3S is sufficient
- Need > 28K steps or faster scan? → Consider F3SP35-5N or F3SP38-6N
- Ethernet required natively? → F3SP38-6N or F3SP58-6H recommended
- Budget-constrained replacement? → F3SP22-0S for non-critical, low-complexity loops
- Motion/high-speed control? → F3SP53-4H or F3SP58-6H series
- Exact OEM replacement (no re-programming)? → F3SP28-3S original is the only safe choice
Quality Assurance & Sourcing
- ✅ Genuine Parts Only: All units sourced from authorized distributors or verified surplus channels
- ✅ Pre-shipment Inspection: Visual, label, and functional checks performed before dispatch
- ✅ Traceability Documentation: Lot numbers, date codes, and sourcing records available on request
- ✅ Anti-counterfeit Verification: Cross-referenced against YOKOGAWA serial number databases where applicable
- ✅ Secure Packaging: ESD-safe packaging with humidity indicators for sensitive electronics
How to Order
- Confirm your FA-M3 base unit model and available CPU slot
- Verify current firmware version in your existing system (if replacing)
- Submit your inquiry via support@konmask.com or use the “Add to Cart” / “Request Quote” button above
- Our team will confirm stock availability, lead time, and issue a formal quotation within 24 hours
- Payment, export documentation, and shipping arranged per your requirements
Replacement & Compatibility FAQ
Q: Can F3SP35-5N directly replace F3SP28-3S without reprogramming?
A: In most cases yes — the F3SP35-5N is backward compatible with FA-M3 bases and existing ladder programs. However, always verify I/O module addressing and communication settings before live deployment.
Q: Is the F3SP28-3S still in production?
A: YOKOGAWA has transitioned newer FA-M3 CPU variants into production. F3SP28-3S may be available as new-old-stock (NOS) or refurbished. Contact us for current availability.
Q: Do you supply both new and refurbished units?
A: Yes. We clearly label condition (New / Refurbished / Surplus) on all quotations. Refurbished units undergo full functional testing.
Q: Can you help with cross-referencing to a non-YOKOGAWA PLC?
A: We specialize in YOKOGAWA FA-M3 systems. For cross-brand migration, our engineering team can provide a compatibility assessment — contact us directly.
Q: What is the lead time?
A: In-stock items ship within 3–5 business days. Out-of-stock items typically have a 2–6 week lead time depending on sourcing channel.
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