Yokogawa AAI841-H00 S2 Analog Input Module | Replacement, Equivalent & Selection Guide
The Yokogawa AAI841-H00 S2 is a high-density analog input module designed for the CENTUM VP Distributed Control System (DCS). Engineered for precision signal acquisition in continuous process industries, this module delivers reliable 4–20 mA current input processing across 16 channels, making it a cornerstone component in refinery, chemical, and power generation control architectures.
Technical Specifications
- Model: AAI841-H00 S2
- Manufacturer: Yokogawa Electric Corporation
- Series: CENTUM VP / CS 3000 Compatible
- Module Type: Analog Input (AI)
- Number of Channels: 16 channels
- Input Signal: 4–20 mA DC (current input)
- Input Impedance: 250 Ω (internal)
- Resolution: 16-bit A/D conversion
- Isolation: Channel-to-channel isolation
- Communication: V-net / ER bus (CENTUM VP backplane)
- Power Consumption: Refer to Yokogawa GS sheet
- Operating Temperature: 0°C to 55°C
- Humidity: 5% to 95% RH (non-condensing)
- Dimensions: Standard CENTUM VP I/O module form factor
- Weight: Approx. 300 g
- Suffix -H00: Standard configuration, no HART
- Suffix S2: CE marking / safety compliance variant
- Certifications: CE, UL, cUL (per suffix)
Compatible Replacement & Equivalent Models
When the AAI841-H00 S2 is unavailable or end-of-life, the following models may serve as functional replacements depending on system configuration:
- AAI841-S00 S2 — Same channel count, alternate suffix; verify backplane compatibility
- AAI835-H00 S2 — 8-channel analog input; use two modules to match 16-channel capacity
- AAI143-H00 S2 — HART-enabled analog input; drop-in upgrade for HART-capable loops
- AAI841-H50 S2 — HART multiplexer variant; suitable for HART device management
- AAB841-H00 S2 — Analog input/output combo; evaluate if mixed I/O consolidation is acceptable
⚠ Always verify firmware revision, backplane slot type, and FCS (Field Control Station) compatibility before substituting modules in a live CENTUM VP system.
Why Choose the Original Model
- Guaranteed Compatibility: Factory-validated for CENTUM VP FCS nodes — no re-engineering required
- Proven Field Record: Deployed in thousands of process plants across refining, petrochemical, and utilities sectors
- Yokogawa Support: Full lifecycle support, firmware updates, and spare parts availability through authorized channels
- Regulatory Compliance: S2 suffix confirms CE marking and relevant safety standards for global deployment
- Reduced Commissioning Risk: Original part eliminates integration testing overhead associated with third-party equivalents
Typical Applications
- Oil & gas refinery process monitoring (temperature, pressure, flow via transmitters)
- Chemical plant reactor loop control with 4–20 mA field instruments
- Power generation boiler and turbine analog signal acquisition
- Pulp & paper mill process variable monitoring
- Water treatment plant sensor integration in CENTUM VP DCS
- Pharmaceutical batch process analog data collection
System Compatibility
- Primary Platform: Yokogawa CENTUM VP (all revisions)
- Legacy Compatibility: CENTUM CS 3000 (verify FCS node type)
- Field Control Stations: AFC30D, AFC30S, AFV30D, AFV30S (confirm slot availability)
- Engineering Tools: Yokogawa CENTUM VP Builder / System View
- Not Compatible With: STARDOM, ProSafe-RS, or third-party DCS platforms without gateway hardware
Selection Guide
Use this guide to confirm the AAI841-H00 S2 is the correct module for your application:
- ✅ Need 16-channel analog input? → AAI841-H00 S2 is correct
- ✅ Using standard 4–20 mA transmitters (no HART)? → -H00 suffix is appropriate
- ✅ Require CE compliance? → S2 suffix confirms CE marking
- ⚠ Need HART communication? → Specify AAI841-H50 S2 or AAI143-H00 S2 instead
- ⚠ Only 8 channels needed? → Consider AAI835-H00 S2 for slot efficiency
- ⚠ Mixed analog I/O in one slot? → Evaluate AAB841 series
Quality Assurance & Sourcing
- Condition: New original, refurbished, and tested-used stock available — specify on inquiry
- Inspection: All modules tested for power-on functionality and channel integrity before shipment
- Packaging: Anti-static ESD packaging with original or equivalent protective foam
- Traceability: Serial number and date code recorded for every unit shipped
- Warranty: 12-month warranty on new original; 90-day warranty on refurbished units
- Lead Time: In-stock units ship within 2 business days; sourced units 5–15 business days
How to Order
- Confirm your FCS node type and available I/O slot count in CENTUM VP Builder
- Verify the required suffix (-H00 for standard, -H50 for HART) matches your field wiring
- Contact Konmask with your full part number: AAI841-H00 S2
- Provide quantity, required condition (new/refurbished), and delivery timeline
- Receive quotation within 24 hours on business days
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I replace AAI841-H00 S2 with AAI841-H50 S2 directly?
A: Yes, the H50 is a HART-enabled superset. It is backward compatible in non-HART loops but requires HART configuration in CENTUM VP Builder to avoid alarms.
Q: Is AAI841-H00 S2 compatible with CENTUM CS 3000?
A: Partial compatibility exists depending on FCS revision. Consult Yokogawa TI sheet and confirm with your system integrator before installation.
Q: What is the difference between S1 and S2 suffix?
A: S2 denotes CE marking compliance for European and international markets. S1 is the standard domestic (Japan) variant. Functionally identical in most applications.
Q: Can I use a third-party analog input module as a replacement?
A: Not recommended. CENTUM VP uses proprietary V-net/ER backplane communication. Third-party modules require gateway hardware and extensive re-engineering.
Q: How do I verify the module is genuine Yokogawa?
A: Check the holographic label, serial number format, and Yokogawa part marking on the PCB. Konmask provides traceability documentation with every shipment.
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Contact: support@konmask.com | +0086 19859288691
