The Yokogawa AFV10D-S41251, also cataloged as the AFV10D Field Control Unit, operates as a dedicated hardware component for deterministic regulatory and sequence control execution within CENTUM VP control station platforms.
The AFV10D-S41251 utilizes specific suffix codes to define redundancy architecture, power input requirements, and environmental protection levels.
| Model Suffix | Specification Details |
|---|---|
| AFV10D-S | Standard Field Control Unit type |
| 4 | Dual-Redundant Vnet/IP, Dual-Redundant power supply |
| 1 | Reserved / Always 1 |
| 2 | 220-240 VAC power supply |
| 5 | ISA Standard G3 environmental compliance |
| 1 | LFS1500 Control Function for FIO nodes |
| Parameter | Specification |
|---|---|
| Model | AFV10D-S41251 |
| Brand | Yokogawa |
| Origin | Singapore |
| Weight | 6.0 kg to 8.0 kg (Configuration dependent) |
| Dimensions | 350 x 260 x 180 mm |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | 200 VA |
| Interface | Vnet/IP and FIO node support |
The unit executes process control through deterministic scan cycles, managing I/O signals via Vnet/IP control networks. It supports full duplexing of both processor and power supply modules, enabling failover without interrupting control logic execution. This controller implements channel-to-channel isolation on the I/O bus interface to mitigate electrical interference from field wiring. Integrated diagnostic routines perform continuous monitoring of the control environment, including cold junction compensation (CJC) for analog measurement circuits, maintaining precision regardless of internal thermal variations or localized noise.
Q: Does the AFV10D-S41251 support online module replacement?
A: Yes, the unit supports online maintenance. Redundant CPU and power modules may be extracted and replaced while the control station remains energized, provided the redundancy handshake remains active between the primary and standby modules.
Q: How does the ISA G3 rating affect the hardware?
A: The S41251 suffix indicates that the internal PCB assemblies are treated with conformal coating to meet ISA Standard G3 environmental requirements, providing resistance against corrosive atmospheric contaminants.
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