Product Core Brief
- Model: AAI543-H50/K4A00
- Brand: YOKOGAWA
- Series: CENTUM VP / CS 3000 Analog I/O
- Core Function: 16-channel isolated 4–20 mA analog output with HART communication for CENTUM VP/CS 3000 FCS.
- Product Type: DCS Analog Output Module
- Key Specs: 16 isolated channels | 4–20 mA DC | HART protocol | 0–750 Ω load | /K4A00 KS cable adapter
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction
A failed analog output card can lock a control valve in place or force a loop into manual. The / is a YOKOGAWA CENTUM VP/CS 3000 16-channel, 4–20 mA isolated analog output module with HART protocol support. It is designed for FCS racks where final control elements must receive stable, channel-isolated current signals while still allowing smart device diagnostics.
For procurement and maintenance teams, this module reduces replacement risk. Sixteen isolated outputs help limit cross-channel interference, and the option provides the KS cable interface for the AEA4D terminal board, model ATK4A-00. That preserves existing wiring during swap-outs and shortens commissioning time. The H50 variant supports standard switch-over response in redundant configuration without explosion protection.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Model | / |
| Product Type | Analog Output Module |
| Compatible System | YOKOGAWA CENTUM VP / CS 3000 DCS |
| Signal Range | 4–20 mA DC |
| Channel Count | 16 channels |
| Isolation | Channel-isolated |
| Digital Communication | HART protocol |
| Load Resistance | 0–750 Ω |
| Open-Circuit Detection | < 0.65 mA |
| Redundancy | Standard switch-over response, redundant configuration, no explosion protection |
| Option Code | /K4A00 — KS cable interface adapter for AEA4D terminal board (ATK4A-00) |
Key Selling Points & Differentiators
- 16-channel isolated output: Each channel is electrically isolated, helping prevent ground loops and limiting fault propagation.
- HART-enabled output: Supports smart valve positioners and transmitters that require digital communication over the 4–20 mA loop.
- Correct terminal interface: The option matches AEA4D terminal boards via ATK4A-00, reducing wiring rework during replacement.
- Redundancy-ready: The H50 variant supports standard switch-over response in redundant configuration without explosion protection.
- Not recommended for: Voltage outputs, non-isolated replacements where terminal adapters differ, explosion-proof zones, or fast switch-over redundancy requirements. For fast switch-over, verify the AAI543-H60 family instead.
Quality Transparency SOP
Isolated analog output modules need more than a visual check before shipment.
- Incoming visual QA: Inspect factory sealing, label integrity, connector pins, PCB condition, and corrosion indicators.
- Isolation verification: Use a Fluke multimeter or insulation tester to confirm channel-to-channel and channel-to-ground isolation.
- Output current verification: Apply a calibrated load and verify 4 mA, 12 mA, and 20 mA outputs across multiple channels.
- Load and open-circuit check: Confirm stable output within the 0–750 Ω range and verify open-circuit detection behavior.
- Final packing: Record serial/lot information, apply anti-static packaging, and seal with a condition label.
Technical Risk Avoidance
Confirm the /K4A00 terminal match. This variant uses the KS cable interface for AEA4D terminal boards. Using the wrong adapter can create wiring mismatches.
Do not substitute blindly for AAI543-S50. The H50 adds HART communication. The mechanical fit may be similar, but engineering configuration and device diagnostics must be verified.
Check loop load resistance. The module supports 0–750 Ω. Exceeding this range can cause output saturation or unstable HART communication.
Verify redundancy configuration. The H50 supports standard switch-over response. If the system requires fast switch-over, confirm whether an H60 variant is needed.
Buyer’s FAQ
Is this module genuine YOKOGAWA?
Yes. The / is an OEM YOKOGAWA CENTUM VP/CS 3000 analog output module. We supply it as new original/new surplus unless otherwise stated.
What does /K4A00 mean?
It indicates the KS cable interface adapter for the AEA4D terminal board, model ATK4A-00. This is critical for field wiring compatibility.
Does it support HART?
Yes. The -H50 suffix indicates HART protocol support on a 16-channel, 4–20 mA isolated analog output module.
Can I replace an AAI543-S50 with this module?
Only after engineering review. Both are 16-channel isolated 4–20 mA outputs, but the H50 adds HART communication. Tag configuration and device diagnostics should be verified in the CENTUM VP/CS 3000 project.
What is the warranty and lead time?
Each module carries a standard 12-month functional warranty from shipment, excluding damage from incorrect installation, overloading, or mismatched terminal adapters. In-stock units typically ship within 1–3 business days after payment confirmation.
