YOKOGAWA AFV10D S2 Duplexed Field Control Unit

Name: YOKOGAWA AFV10D S2 Duplexed Field Control Unit
Brand: Yokogawa

Model: AFV10D S2

Brand Yokogawa

Series AFV Series

Model AFV10D S2

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Product Details And Specifications

YOKOGAWA AFV (Field Control Unit) Series Technical Notes

The YOKOGAWA AFV series Field Control Units (FCUs) are core execution nodes within the CENTUM VP Distributed Control System (DCS), one of the most widely deployed process automation platforms in global heavy industry. Installed across petrochemical complexes, LNG terminals, nuclear power facilities, crude oil refineries, and large-scale chemical plants, the AFV series handles real-time process control with deterministic scan cycles and redundant architecture options. The AFV10D S2 specifically represents the duplexed (redundant) configuration of the AFV10 controller node, designed for applications where single-point failure is operationally unacceptable. Its deployment footprint spans facilities in Asia-Pacific, the Middle East, and Europe where CENTUM VP is the primary DCS backbone.

The Evolution of AFV Series Architecture

The AFV series traces its lineage through YOKOGAWA's successive DCS generations. The original CENTUM platform (1975) established the foundational node-based control philosophy. CENTUM-XL and CENTUM CS followed, introducing Vnet as the primary control bus. The CENTUM CS 3000 generation introduced the AFV30 and AFV40 FCU nodes, which operated on Vnet/IP and supported expanded I/O capacity. With the release of CENTUM VP (circa 2008 onward), YOKOGAWA unified the control bus under Vnet/IP and introduced the current AFV series lineup — AFV10, AFV20, AFV30, AFV40 — differentiated by I/O node capacity and redundancy options.

The suffix conventions are critical for procurement: S1 denotes simplex (non-redundant) configuration; S2 denotes duplexed (redundant) configuration with dual CPU modules operating in hot-standby mode. The AFV10D S2 is therefore a duplexed, compact-capacity FCU node. Compatibility with legacy Vnet segments requires specific firmware revisions; integration with CENTUM VP R6.x and later requires validation of the FCU firmware version against the system release notes. Backward compatibility with CS 3000 I/O sub-systems via the SB401 bus interface is supported under specific configuration constraints.

AFV Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified AFV and directly associated FCU-layer components within the CENTUM VP ecosystem. Each entry reflects a distinct hardware function within the control node architecture.

AFV10D S1: Simplex Field Control Unit, compact I/O capacity, single CPU node, Vnet/IP connected.
AFV10D S2: Duplexed Field Control Unit, hot-standby redundant CPU pair, compact node, Vnet/IP bus.
AFV20D S1: Simplex FCU, mid-range I/O node count, single processor, standard rack mount.
AFV20D S2: Duplexed FCU, mid-range capacity, redundant CPU pair, hot-standby operation.
AFV30D S1: Simplex FCU, high-capacity I/O node, single CPU, extended sub-node support.
AFV30D S2: Duplexed FCU, high-capacity, redundant CPU, supports expanded Vnet/IP segment.
AFV40D S1: Simplex FCU, maximum I/O capacity tier, single CPU, large-scale process applications.
AFV40D S2: Duplexed FCU, maximum capacity, redundant CPU pair, mission-critical process control.
CP451-10: CPU module for AFV FCU nodes, primary processor card, CENTUM VP compatible.
CP451-50: Enhanced CPU module, higher scan rate support, AFV series FCU replacement card.
EB401-1: Vnet/IP interface card, FCU-to-control bus connectivity module, redundant pair capable.
SB401: Node interface unit, connects FCU to I/O sub-node bus, legacy CS 3000 bridge support.
PW481: Power supply module for AFV FCU chassis, 24VDC input, redundant pair mountable.
PW482: Redundant power supply module, AFV chassis, hot-swap capable, dual-feed configuration.
EB501: Enhanced Vnet/IP bus interface, AFV30/AFV40 series, higher bandwidth segment support.
RIO (Remote I/O Node): Sub-node I/O expansion unit, connects via SB401 to AFV FCU, field-mounted.
CP345: Legacy CPU module, CENTUM CS 3000 FCU, referenced for cross-generation migration planning.

Quality Control for the AFV Series Range

AFV series FCU modules present specific test challenges due to their integrated backplane bus architecture and dual-CPU synchronization logic. DriveKNMS applies the following verification protocol to all AFV series units prior to dispatch:

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