Description
The designation K4A00 is a specific factory suffix or option code appended to base model numbers of Yokogawa CENTUM VP and CENTUM CS 3000 distributed control system (DCS) I/O modules (such as the AAI143 or AAI543 series).
In Yokogawa’s product numbering convention, these terminal and coating options define specific physical interface styles, compliance standards, or temperature range specifications designated for a given project execution or regional market destination.
Technical Specifications (Contextual Basis)
When paired with standard analog I/O modules (e.g., AAI143-H50/K4A00 or AAI543 series), the hardware handles standard industrial process signals under the following framework:
| Parameter | Value |
| Supported Modules | CENTUM VP / ProSafe-RS I/O series (e.g., Analog Input/Output cards) |
| Signal Range | 4 to 20 mA DC (with or without HART digital communication protocol support depending on base card model) |
| Isolation | Channel-to-ground isolation (dependent on base module specifications) |
| Data Update Period | 10 ms |
| Operating Temperature | -20 to +70°C (standard Yokogawa DCS node environment) |
| Compliance Standards | IEC 61131-2, CE, G3 corrosive gas compliance (dependent on complete suffix string; verify with OEM datasheet) |
Availability and Commercial Terms
- Condition: New Original Factory Surplus / Factory Sealed / Refurbished (tested). Specify exact condition with supplier prior to procurement.
- Lead Time: 1 to 5 business days for standard stock items; factory allocation may apply for specialty coated variants.
- Warranty: 12-month standard replacement warranty from the date of invoice.
- Pricing Note: Listed price is indicative and subject to market conditions. Contact our engineering sales desk for a formal quotation and stock verification.
System Integration and Compatibility Notes
Hardware Configuration
The /K4A00 suffix governs specific manufacturing, testing, or regional configuration constraints applied to the base card. When replacing or expanding an existing Yokogawa Field Control Station (FCS) rack (such as an AFV10 or AFV30 series controller), ensure that the complete model code—including all prefix and suffix options—matches the hardware definitions configured in the CENTUM VP System Generation (CENTUM CS builder).
Terminal Block and Cable Interfacing
- Base Connections: Designed to interface with dedicated Yokogawa pressure clamp terminal blocks, KS cables, or dedicated transition boards.
- Signal Integrity: Verify grounding and shielding requirements at the marshalling panel. For HART-enabled variants, ensure that the external loop resistance falls within the functional communication window (typically 250 to 750 ohms).
Frequently Asked Questions
Can I replace an I/O module without the /K4A00 suffix with a /K4A00 unit?
Generally, standard suffix variations dictate minor manufacturing, testing documentation, or packaging constraints rather than core functional performance. However, you must verify complete compatibility and node software revision requirements within the CENTUM VP engineering environment before hot-swapping or commissioning live hardware.
How do I verify if my system supports HART communication with this module?
HART-compatible I/O modules require proper firmware revisions on both the node interface cards and the FCS processor (e.g., EB401 firmware rev. 2 or later for specific node units). Check the physical card label and cross-reference the complete model code against the relevant Yokogawa General Specification (GS) sheet.
| Yokogawa NFPW444 – I/O Module for Yokogawa CENTUM VP Control Systems |
| YOKOGAWA CP471-00 – CENTUM VP Processor Module |
| Yokogawa CP451-51 – Field Control Unit (FCU) Processor Module |
