Product Core Brief
- Model: AFV30D-A41252
- Brand: YOKOGAWA
- Series: CENTUM VP / FCU
- Core Function: Dual-redundant field control unit providing high-availability process control and Vnet/IP networking.
- Product Type: Dual Field Control Unit
- Key Specs: Dual Redundant | 220-240VAC | 19-Inch Rack
- Condition: New Surplus / Original
Product Introduction
YOKOGAWA AFV30D-A41252 is a dual-redundant field control unit designed for the CENTUM VP distributed control system. This YOK module delivers high-availability process control with dual Vnet/IP networks and dual power supplies for zero-interruption operation.
The “-A” suffix designates a standard type for CP471 processors, while “41252” specifies dual redundant networks and 220-240VAC power. The YOK features a 19-inch rack mount design with a control cycle of less than 10ms and fault switchover under 10ms.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Dual Field Control Unit (FCU) |
| Redundancy | Dual Redundant (Network + Power + CPU) |
| Power Supply | 220-240 VAC |
| Rack Format | 19-Inch Standard Rack Mount |
| Network Protocol | Vnet/IP (Dual Redundant) |
| Field I/O | FIO Compatible |
| Processor Compatibility | CP471 Standard Type |
| Control Cycle | < 10ms |
| Fault Switchover | < 10ms |
| Operating Temp | 0°C to 50°C |
| Humidity | ≤ 90% RH (Non-condensing) |
| Protection Rating | IP20 |
Quality Control Process
Redundant controllers demand rigorous validation. Every YOK undergoes a full dual-redundancy burn-in on a live test rack. We verify both power supplies operate independently and that seamless switchover occurs when one is disconnected. Vnet/IP communication is tested on both redundant links to confirm automatic failover. Processor synchronization is validated by forcing a primary CPU fault and confirming the backup takes over within the 10ms specification. Backplane I/O communication is stress-tested under full load. Units exhibiting any timing drift or sync failures are immediately quarantined.
Replacement Pitfall Guide
❗ Verify Suffix Compatibility: The “-A41252” suffix is highly specific. “-A” means standard type for CP471, “4” means dual redundant network/power, “12” means 220-240VAC. Substituting with “-S” (CP461) or “11” (100-120VAC) will cause system incompatibility or power damage.
❗ Dual Power Supply Wiring: This unit requires both redundant power feeds. Never operate on a single power supply during commissioning. Verify both AC inputs are energized and within tolerance before enabling redundancy. Single-feed operation defeats the purpose of dual redundancy.
❗ Vnet/IP Network Cabling: Dual redundant networks require properly terminated, shielded Ethernet cables. Use the correct fiber or copper media as specified. Mismatched cable types or poor termination cause intermittent network faults that trigger unnecessary switchover events.
❗ Rack Space and Cooling: The 19-inch rack mount design requires adequate airflow. Ensure adjacent slots have proper blanking panels and that cabinet cooling can handle the heat load. Overheating triggers thermal protection shutdowns.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| Direct | Exact match; verify firmware revision | ||
| AFV30D-A41152 | Direct | A41152 is 100-120VAC; A41252 is 220-240VAC. Verify site power | |
| AFV30D-S41251 | Needs Adaptation | S-type is for CP461; A-type is for CP471. Verify processor compatibility | |
| AFV30D-A41262 | Direct | Minor revision difference; verify firmware compatibility |
- Redundancy Switchover Time: < 10ms (bumpless transfer)
- System Availability: 99.99999% (with proper redundant configuration)
Need help verifying your site power requirements or checking Vnet/IP network cabling specifications for this dual-redundant controller? I can walk you through the pre-installation checklist.
