YOKOGAWA NFAF135-S50 Analog Output Module | Replacement, Equivalent & Selection Guide
The YOKOGAWA NFAF135-S50 is a high-precision analog output module designed for the STARDOM FCN/FCJ autonomous controller platform. It delivers reliable 4–20 mA current output for process control applications in oil & gas, chemical, power, and manufacturing industries. This page provides full technical specifications, compatible replacement options, and a structured selection guide to help engineers and procurement teams make informed decisions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | NFAF135-S50 |
| Brand | YOKOGAWA |
| Series | STARDOM FCN / FCJ |
| Module Type | Analog Output Module |
| Output Channels | 4 channels (isolated) |
| Output Signal | 4–20 mA DC |
| Resolution | 16-bit |
| Load Resistance | Max. 600 Ω |
| Accuracy | ±0.1% of full scale |
| Power Supply | 24 V DC (supplied via backplane) |
| Isolation | Channel-to-channel & channel-to-bus isolated |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -25°C to 70°C |
| Humidity | 5% to 95% RH (non-condensing) |
| Dimensions (W×H×D) | Approx. 30 × 130 × 100 mm |
| Weight | Approx. 600 g |
| Certifications | CE, UL, cUL |
| Communication | Via FCN/FCJ backplane bus |
Compatible Replacement & Equivalent Models
When the NFAF135-S50 is discontinued, hard to source, or requires a cost-effective alternative, the following models may serve as functional equivalents. Always verify electrical and mechanical compatibility before substitution.
| Model | Brand | Channels | Output | Compatibility Notes |
|---|---|---|---|---|
| NFAF135-S00 | YOKOGAWA | 4 CH | 4–20 mA | Same series, different suffix — verify firmware version |
| NFAF135-S10 | YOKOGAWA | 4 CH | 4–20 mA | Partial equivalent; confirm I/O mapping |
| F3DA04-0N | YOKOGAWA (FA-M3) | 4 CH | 4–20 mA | Different platform — requires signal conditioning |
| AAI141-S00 | YOKOGAWA (CENTUM VP) | 16 CH | 4–20 mA | Higher channel count; different rack form factor |
| 1756-OF4 | Allen-Bradley | 4 CH | 4–20 mA / 0–10 V | Cross-brand; requires full I/O reconfiguration |
⚠ Disclaimer: Cross-brand replacements require engineering validation. Konmask.com recommends consulting your system integrator before substitution.
Why Choose the Original Model
- Guaranteed Compatibility: Plug-and-play with STARDOM FCN/FCJ backplane — no firmware changes required.
- Certified Accuracy: ±0.1% full-scale accuracy with 16-bit resolution for precision process control.
- Channel Isolation: Full channel-to-channel isolation minimizes cross-talk and ground loop interference.
- Long-Term Support: YOKOGAWA provides extended lifecycle support and spare parts availability.
- Proven Reliability: Deployed in thousands of process plants globally across oil & gas, chemical, and power sectors.
Typical Applications
- Flow control valve positioner output in oil & gas pipelines
- Temperature setpoint transmission in chemical reactors
- Pressure regulator control in water treatment plants
- Speed reference output for variable frequency drives (VFDs)
- Analog setpoint distribution in power generation control systems
- Batch process control in pharmaceutical manufacturing
System Compatibility
The NFAF135-S50 is designed exclusively for the YOKOGAWA STARDOM FCN/FCJ autonomous controller platform. It slots into the FCN/FCJ I/O expansion rack and communicates via the proprietary backplane bus.
- Compatible Controllers: STARDOM FCN-100, FCN-500, FCJ
- Compatible Racks: STARDOM FCN I/O expansion units (standard and compact)
- Engineering Tool: STARDOM Resource Configurator (SRC) / FAST/TOOLS
- Not Compatible With: CENTUM VP, ProSafe-RS, FA-M3 (without hardware adaptation)
Selection Guide
Use the following criteria to confirm the NFAF135-S50 is the right module for your application:
| Requirement | NFAF135-S50 Suitability |
|---|---|
| STARDOM FCN/FCJ platform | ✅ Direct fit |
| 4-channel 4–20 mA output | ✅ Native support |
| Channel isolation required | ✅ Full isolation |
| High-accuracy output (±0.1%) | ✅ 16-bit resolution |
| Hazardous area (Ex-rated) | ⚠ Verify with YOKOGAWA — separate Ex barrier may be required |
| More than 4 output channels | ⚠ Consider multiple modules or AAI141 series |
| Non-YOKOGAWA DCS/PLC | ❌ Not recommended without signal conversion |
Quality Assurance & Sourcing
At Konmask.com, we specialize in sourcing genuine and certified industrial automation components for global B2B buyers.
- ✅ Genuine Parts: All YOKOGAWA modules are sourced from authorized distributors or verified surplus channels.
- ✅ Inspection: Each unit undergoes visual inspection and functional verification before shipment.
- ✅ Warranty: 90-day replacement warranty on all stocked items.
- ✅ Traceability: Full documentation available upon request (COO, test reports, packing list).
- ✅ Global Shipping: DHL / FedEx / UPS express delivery worldwide; EXW/FOB Xiamen available.
How to Order
- Click “Add to Cart” or “Buy Now” on this page for immediate checkout.
- For bulk orders, OEM pricing, or lead time inquiries — email support@konmask.com.
- Provide your model number, quantity, and delivery destination for a fast quotation.
- WhatsApp / WeChat: +86 198-5928-8691 for urgent sourcing requests.
Replacement & Compatibility FAQ
Q: Can I use NFAF135-S00 as a direct replacement for NFAF135-S50?
A: The suffix difference typically indicates a hardware revision or regional variant. Functional compatibility is likely but must be confirmed against your FCN firmware version and I/O configuration.
Q: Is the NFAF135-S50 still in production?
A: YOKOGAWA periodically revises its STARDOM product line. Contact Konmask.com to check current availability and lead times.
Q: Can this module be used with a third-party DCS?
A: No. The NFAF135-S50 communicates via YOKOGAWA’s proprietary FCN backplane bus and is not compatible with third-party controllers without significant hardware and software adaptation.
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 unit. Volume discounts are available for orders of 5+ units.
Q: Do you provide a certificate of origin or test report?
A: Yes. Full traceability documentation is available upon request for all orders.
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