Designing Current Shunt Measurements That Stay Accurate
A practical guide to current-shunt measurement covering resistor sizing, high-side and low-side placement, Kelvin sensing, error budgets, thermal effects, protection and commissioning tests.
Manufacturer: Yokogawa
Product No.: AFV30S-S41251/HKU
Country of origin:Japan
Product Type: Field Control Units
Payment: T/T, Western Union
Weight: 7000g
Dimensions: 207 mm x 265.9 mm x 482.6 mm (D x H x W)
Shipping port: Xiamen
Warranty: 12 months
The Yokogawa AFV30S-S41251/HKU is a 19-inch rack-mountable Field Control Unit (FCU) designed as the core component of the control function within the CENTUM VP integrated production control system. It processes process operations, manages field communications over dual-redundant Vnet/IP networks, and handles local and remote I/O data through FIO interface configurations.
This single-processor module platform supports up to 8 I/O modules directly on the rack assembly and connects to up to 13 ESB bus or optical ESB bus node units. Equipped with dual-redundant power supply modules operating at 220-240 V AC, this unit incorporates an integrated House Keeping Unit interface (/HKU option) that outputs FCU fault contacts, monitors cabinet environmental conditions via the HK bus and optical ESB bus, and displays system alarms directly on the Human Interface Station (HIS).
| Model / Suffix Code | Option Code | Description |
|---|---|---|
| AFV30S | --- | Field Control Unit (for FIO, 19-inch Rack Mountable) |
| -S | --- | Standard type (for CP461) |
| 4 | --- | Dual-redundant Vnet/IP, dual-redundant power supply |
| 1 | --- | Always 1 |
| 2 | --- | 220-240 V AC power supply |
| 5 | --- | Basic type with no explosion protection |
| 1 | --- | Control function for field control station (LFS1700) |
| --- | /HKU | With HKU interface |
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa |
| Model | AFV30S-S41251/HKU |
| Product Type | Field Control Unit (19-inch Rack Mountable) |
| System Compatibility | CENTUM VP |
| Processor Module | CP461 |
| Communication Interface | Dual-redundant Vnet/IP |
| Power Supply | Dual-redundant power supply, 220-240 V AC, 50/60 Hz |
| Power Consumption | 230 VA |
| I/O Module Capacity | Max. 8 |
| Connectable Node Units | Max. 13 (Total ESB Bus ANB10 and Optical ESB Bus ANB11) |
| Memory Backup | Battery backup for main memory: Max. 72 hours (Recharge time: Min. 48 hours) |
| READY Contact Output | 2 terminals (NC, C), 30 V DC, max. 0.3 A (Opens during FCU failure) |
| Mounting Type | 19-inch rack mounting (M5 x 8 screws) |
| Weight | Approx. 7.0 kg |
| Connector Pin / Interface | Function |
|---|---|
| Power Supply Terminals | M4 screw terminal connection |
| Grounding Terminal | M4 screw terminal connection |
| READY Contact Output Terminals | M4 screw terminal connection (NC, C) |
| Network Interfaces | Connect UTP cable (CAT5e or better) to Layer 2 switch for Vnet/IP |
| HKU Interface | Cabinet environment monitoring, HK bus connection, and FCU fault contact output |
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Returns & Warranty

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Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Japan
|