YOKOGAWA K9403 FID Card Modules — K9403JA-02

Technical Dossier

Product Details And Specifications

YOKOGAWA K9403 Series: Comprehensive Module Range and Technical Overview

The YOKOGAWA K9403 series Field Indication Device (FID) cards are deployed across critical heavy-industry infrastructure worldwide, including petrochemical complexes, nuclear power facilities, offshore platforms, and large-scale refinery operations. As a core component of the YOKOGAWA CENTUM CS 3000 and CENTUM VP distributed control systems, the K9403 FID card family provides the field-side signal interface layer responsible for analog input acquisition, field device communication, and real-time process data transmission to the DCS controller bus. Installations of CENTUM CS 3000 and CENTUM VP systems span hundreds of sites globally, many of which have operational lifespans exceeding 20–30 years, making the K9403 series a long-term maintenance-critical component category.

The Evolution of K9403 Architecture

The K9403 FID card series was introduced as part of YOKOGAWA's CENTUM CS 3000 platform, which succeeded the earlier CENTUM-XL and CENTUM CS systems in the late 1990s. The CS 3000 architecture established a modular, redundancy-capable field bus structure in which FID cards serve as the primary analog signal conditioning and field wiring termination interface. Early K9403 variants were designed for 4–20 mA analog input loops with HART protocol pass-through capability, enabling field device diagnostics without loop interruption.

With the transition to CENTUM VP (introduced circa 2008), YOKOGAWA maintained backward hardware compatibility for the K9403 card form factor, allowing existing CS 3000 installations to migrate to VP controllers without full field wiring replacement. This architectural continuity is a defining characteristic of the K9403 series and a primary reason for its continued relevance in brownfield plant maintenance. Later sub-variants introduced enhanced EMC shielding, revised backplane connector tolerances, and updated firmware-compatible EEPROM configurations. Plants operating mixed CS 3000 / CENTUM VP environments must verify sub-variant compatibility (JA, JB, JC suffix designations) before substitution.

As of 2026, the K9403 series is in the mature-to-declining phase of its product lifecycle. YOKOGAWA has transitioned active development to the CENTUM VP R6 platform and the Vnet/IP field network architecture. However, the installed base of CS 3000 and early CENTUM VP systems remains substantial, and OEM new-production of K9403 cards has been reduced. End-users are increasingly dependent on certified aftermarket suppliers and refurbished stock for ongoing maintenance and emergency replacement.

K9403 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the YOKOGAWA K9403 FID card series, organized by functional sub-category. Each entry reflects a distinct hardware configuration or revision level.

Analog Input FID Cards

• K9403JA-02: 16-channel analog input FID card, 4–20 mA, HART-compatible, CS 3000 / CENTUM VP
• K9403JA-01: 16-channel analog input FID card, standard revision, non-HART variant
• K9403JB-01: 16-channel analog input FID card, revised backplane interface, enhanced EMC
• K9403JB-02: 16-channel analog input FID card, JB hardware revision with HART pass-through
• K9403JC-01: 16-channel analog input FID card, JC revision, CENTUM VP R4/R5 compatible
• K9403JC-02: 16-channel analog input FID card, JC revision with updated EEPROM firmware

Analog Output FID Cards

• K9403KA-01: 8-channel analog output FID card, 4–20 mA, loop-powered, CS 3000
• K9403KA-02: 8-channel analog output FID card, HART-compatible output, CENTUM VP
• K9403KB-01: 8-channel analog output FID card, KB hardware revision, enhanced isolation

Digital Input FID Cards

• K9403LA-01: 32-channel digital input FID card, 24 VDC, dry contact, CS 3000
• K9403LA-02: 32-channel digital input FID card, 24 VDC, wet contact input variant
• K9403LB-01: 32-channel digital input FID card, LB revision, CENTUM VP compatible

Digital Output FID Cards

• K9403MA-01: 16-channel digital output FID card, 24 VDC, transistor output, CS 3000
• K9403MA-02: 16-channel digital output FID card, relay output variant, CENTUM VP
• K9403MB-01: 16-channel digital output FID card, MB revision, enhanced surge protection

Communication / Fieldbus Interface Cards

• K9403PA-01: FOUNDATION Fieldbus H1 interface FID card, single segment, CS 3000
• K9403PA-02: FOUNDATION Fieldbus H1 interface FID card, dual segment, CENTUM VP

Sourcing Hard-to-Find & Obsolete K9403 Parts

DriveKNMS maintains a dedicated inventory program for YOKOGAWA K9403 series components, with specific focus on models that have been discontinued from OEM production or placed on extended lead-time allocation. For plants operating CENTUM CS 3000 systems beyond the standard support window, sourcing replacement FID cards through the open market is frequently the only viable path to maintaining system availability without a full platform migration.

DriveKNMS sources K9403 units through a controlled supply chain that includes decommissioned plant equipment, certified refurbishment programs, and verified surplus inventory from authorized industrial distributors. All units are inspected against original YOKOGAWA hardware specifications prior to dispatch. Emergency same-day quotation is available for critical shutdown situations. Long-term blanket order agreements are available for maintenance contractors managing multi-site CENTUM CS 3000 / CENTUM VP estates.

Quality Control for the K9403 Range

The K9403 FID card series presents specific quality verification challenges due to its multi-layer PCB construction, precision analog signal conditioning circuitry, and backplane bus interface requirements. DriveKNMS applies a structured test protocol to all K9403 units prior to shipment.

Each card undergoes visual inspection for backplane connector pin integrity, capacitor condition, and conformal coating status. Functional testing is performed using YOKOGAWA-compatible test fixtures that simulate CS 3000 / CENTUM VP backplane bus signals, verifying channel-by-channel analog accuracy (±0.1% FS), HART communication pass-through integrity, and digital I/O switching response. Cards with EEPROM-stored calibration data are verified against factory baseline parameters. Units that fail any test threshold are quarantined and not offered for sale. Test records are retained and available upon request for quality-critical procurement processes.