YOKOGAWA AET4D – Relay Terminal Board | CENTUM VP / CS 3000 DCS Platform
Engineering Background
The AET4D is a relay-type terminal board designed for use within YOKOGAWA’s CENTUM VP and CS 3000 Distributed Control System (DCS) architecture. It serves as the physical interface layer between field wiring and the I/O subsystem, enabling reliable signal conditioning and relay-based output switching in process automation environments. This component is integral to plant-wide control loops across refining, petrochemical, power generation, and pharmaceutical industries.
Product Positioning
As a certified YOKOGAWA OEM component, the AET4D is engineered to exact factory tolerances and is fully compatible with YOKOGAWA’s modular I/O architecture. Procurement engineers sourcing replacement or expansion parts for CENTUM VP / CS 3000 installations will find the AET4D to be a direct, drop-in solution requiring no field reconfiguration.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | AET4D |
| Manufacturer | YOKOGAWA Electric Corporation |
| Product Series | CENTUM VP / CS 3000 |
| Module Type | Relay Terminal Board |
| Form Factor | DIN-rail / rack-mount terminal board |
| Compatible Systems | CENTUM VP, CENTUM CS 3000 |
| Output Type | Relay contact output |
| Weight | Approx. 1,300 g |
| Country of Origin | Japan |
| Condition | New / Refurbished (specify on inquiry) |
Proven Application Environments
- Oil & Gas: Upstream/downstream process control loops requiring relay-isolated discrete outputs
- Petrochemical Plants: Integration with CENTUM VP field control stations (FCS) for valve and actuator control
- Power Generation: Turbine and boiler control systems using CS 3000 I/O subsystems
- Pharmaceutical Manufacturing: GMP-compliant process automation with YOKOGAWA DCS infrastructure
- Pulp & Paper / Water Treatment: Continuous process environments requiring high-reliability relay outputs
Engineering Advantages
- Direct OEM Compatibility: Designed and manufactured by YOKOGAWA — no third-party adaptation required
- Relay Isolation: Provides galvanic isolation between field devices and DCS I/O cards, protecting control system integrity
- Drop-In Replacement: Identical form, fit, and function to original factory-installed units — minimizes downtime during maintenance
- Robust Construction: Built to industrial-grade standards for continuous operation in harsh plant environments
- Long Service Life: Relay contacts rated for high cycle counts, reducing maintenance frequency
System Architecture & Signal Flow
In a CENTUM VP / CS 3000 system, the AET4D terminal board is mounted adjacent to the I/O module rack. Field wiring terminates at the AET4D’s screw terminals. The relay contacts switch in response to commands from the DCS I/O card, providing discrete output signals to field actuators, solenoid valves, or alarm annunciators. The relay isolation stage ensures that field-side faults do not propagate into the DCS backplane, maintaining system availability.
Signal path: DCS FCS → I/O Card → AET4D Relay Terminal Board → Field Device
Sourcing & Quality Verification
- All units sourced through authorized YOKOGAWA distribution channels or verified industrial surplus with full traceability
- Pre-shipment inspection includes visual examination, label verification (part number, revision, date code), and functional relay continuity test
- Packaging: anti-static bag + foam-lined carton; weight ~1,300 g
- Certificate of conformance available upon request
- Counterfeit-prevention: serial number and holographic label cross-checked against YOKOGAWA factory records where applicable
Procurement Process
- Confirm compatibility: Verify your CENTUM VP / CS 3000 system revision and I/O card model against AET4D specifications
- Request a quote: Contact support@konmask.com for volume pricing, lead time, and condition options
- Place order: Purchase directly via this listing or via PO/wire transfer for B2B orders
- Shipping: Global express shipping available (DHL / FedEx); export documentation and customs declaration provided
- After-sales: 30-day return policy for unused units; technical support available via email
Technical FAQ
Q: Is the AET4D compatible with both CENTUM VP and CS 3000?
A: Yes. The AET4D is designed for use across both CENTUM VP and CS 3000 platforms. Confirm your specific I/O card model for exact compatibility.
Q: What is the relay contact rating?
A: Please refer to the YOKOGAWA AET4D datasheet or contact us for the full electrical specification sheet.
Q: Can I order in bulk?
A: Yes. Volume discounts are available for orders of 5+ units. Contact support@konmask.com for a formal quotation.
Q: Do you provide a warranty?
A: All units carry a 90-day functional warranty. Extended warranty options available on request.
Q: What documentation is included?
A: Certificate of conformance, packing list, and customs invoice. YOKOGAWA datasheet available on request.
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