Product Core Brief
- Model: YOKOGAWA AAI143-S00 S1
- Brand: YOKOGAWA
- Series: CENTUM CS 3000 / AAI143 Analog Input Series
- Core Function: Converts sixteen isolated 4–20 mA field signals into digital process values for CENTUM CS 3000 DCS control and monitoring.
- Product Type: DCS Analog Input Module
- Key Specs: 4–20 mA | 16 isolated channels | ±16 µA accuracy | 10 ms update | 24 VDC loop supply | standard switchover redundancy
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction
Drift on a single analog input can hide a bad transmitter reading before the loop ever trips. The YOKOGAWA AAI143-S00 S1 is a 16-channel isolated 4–20 mA analog input module for CENTUM CS 3000 DCS, used to digitize field signals from pressure, flow, level, and temperature transmitters.
This card carries the “-S00” suffix, so it is a standard non-HART module with the basic environmental option, plus the S1 style revision. If your original card was an AAI143-H50, AAI143-S51, or AAI143-S53, the HART capability, ISA G3 coating, or extended temperature rating may not match. For straightforward 4–20 mA input applications, this module delivers ±16 µA accuracy, 10 ms data update, and support for standard switchover in dual-redundant configurations. Keeping one sealed spare on hand can cut troubleshooting time from hours to minutes.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | AWA S1 |
| Product Type | Analog Input Module (DCS) |
| Compatible System | CENTUM CS 3000 series |
| Input Signal | 4–20 mA |
| Channels | 16 isolated channels |
| Accuracy | ±16 µA |
| Data Update Period | 10 ms |
| Input Impedance | 270–350 Ω (power ON); ≥500 kΩ (power OFF) |
| Max Input Current | 24 mA |
| Transmitter Supply | 24.0–25.5 VDC, up to 25 mA per channel |
| Wiring | 2-wire or 4-wire per channel |
| Redundancy | Dual-redundant, standard switchover response |
| HART Communication | Not supported on -S00 suffix |
Key Selling Points & Differentiators
- Exact replacement for CENTUM CS 3000 systems requiring a non-HART, 16-channel 4–20 mA AI card.
- Isolated channels reduce ground-loop interference and improve measurement stability.
- ±16 µA accuracy and 10 ms update support reliable process monitoring and alarm handling.
- Built-in 24 VDC transmitter supply simplifies 2-wire loop wiring.
- Supports dual-redundant configurations with standard switchover response.
- Not recommended for applications that require HART device diagnostics; choose an AAI143-Hxx variant instead.
Quality Transparency SOP
- Visual inspection: Check label, suffix code, style number, connector pins, and housing for moisture, corrosion, or handling damage.
- Seal verification: Confirm original anti-static bag, desiccant, and factory labeling before opening.
- Backplane power check: Verify 5 VDC and 24 VDC rails before insertion to prevent unstable channel readings.
- Channel accuracy test: Use a Fluke multimeter and a precision current source to verify 4 mA, 12 mA, and 20 mA readings across multiple channels.
- Transmitter supply test: Measure 24 VDC loop supply under load and check channel isolation with a Fluke insulation tester.
Technical Risk Avoidance
❗ Confirm the suffix before ordering. AAI143-S00 S1 is a standard, non-HART module. It is not a direct functional replacement for AAI143-H50/H53 cards when HART communication is required.
❗ Check your node unit and backplane power budget. This module supplies up to 25 mA per channel; fully loaded 2-wire loops can draw significant 24 VDC current.
❗ Verify the terminal board and cable type. Depending on wiring, the module may require AEA4D terminal boards with KS cable, MIL connector cable, or pressure-clamp terminals.
❗ In redundant configurations, ensure both modules share the same suffix code. Mismatched cards can prevent proper switchover or cause input drops during failover.
Buyer’s FAQ
Is the YOKOGAWA AAI143-S00 S1 a genuine OEM part?
Yes. It is an original Yokogawa AAI143 series analog input module supplied as new surplus, factory sealed when available. We do not rebrand or relabel third-party substitutes.
What does “S00 S1” mean?
“-S” means standard analog input without HART; “00” indicates the basic option; “S1” is the style revision. If your system requires HART, ISA G3 coating, or -20 to 70 °C operation, this exact suffix may not match.
Is this new, refurbished, or used?
Listed as new original surplus. If the factory seal is intact, it ships sealed. If the seal was previously opened for inspection, the listing will state it clearly.
Can I replace an AAI143-H50 with this module?
Only if HART communication is not required. Functionally it reads 4–20 mA inputs, but you will lose HART device access and configuration.
What warranty do you offer?
A 12-month warranty against manufacturing defects and DOA issues. Damage from incorrect wiring, overvoltage, backplane faults, or mismatched system configuration is not covered.
