Description
The Yokogawa AAI143-H50 is a 16-channel, galvanically isolated analog input module designed for the CENTUM CS 3000 and CENTUM VP Distributed Control Systems (DCS). It processes standard 4 to 20 mA current loops from field transmitters and supports HART digital communication overlay for smart instrument diagnostics and configuration.
Technical Specifications (Model Suffix: -H50)
| Parameter | Value |
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Analog Input Module (Field-control Network / FIO) |
| Number of Channels | 16 channels, fully isolated |
| Input Signal Range | 4 to 20 mA DC |
| Allowable Input Current | 24 mA max |
| Input Resistance | Power ON: 270 \Omega at 20 mA to 350 \Omega at 4 mA |
| Measurement Accuracy | \pm 16 \muA |
| Data Update Period | 10 ms |
| Transmitter Power Supply | 19.0 V DC or higher (at 20 mA), 25.5 V DC or less (at 0 mA) (limit: 25 mA) |
| Withstanding Voltage | 1,500 V AC for 1 minute (between input and system logic) |
| HART Communication | Supported (overlay digital communication protocol) |
| Current Consumption | 230 mA max (5 V DC), 540 mA max (24 V DC) |
| Module Weight | 0.3 kg |
Supply Terms & Commercial Details
- Availability: Stock levels vary; typically available for quick dispatch or project staging.
- Lead Time: Stock items ship within 3 to 5 business days; factory-sourced or specialized variant lead times vary by region.
- Warranty: 12-month standard replacement warranty covering functional hardware defects.
- Condition: New Surplus / Factory Original (confirm exact packaging state upon inquiry).
- Pricing Note: Listed price is indicative, not final. Price subject to market conditions; contact us for a firm quote.
Engineering & Integration Guidance
When deploying the AAI143-H50 in safety-related or high-availability control architectures, observe the following technical constraints:
- Redundancy Configuration: The module supports dual-redundant deployment configurations (-H variant with dual node setups) when paired with dedicated terminal boards and redundant node interface units.
- HART Routing Constraints: When utilizing HART communication features over remote node assemblies, ensure system communication card firmware (such as EB401) matches minimum revision requirements to prevent polling latency.
- Barrier Integration: The basic -50 suffix model does not feature internal explosion protection barriers. For hazardous area installations, connect through external galvanic isolation barriers rather than Zener barriers to prevent signal degradation.
- Verification: Always consult the official Yokogawa GS (General Specifications) manual for terminal block mapping (e.g., pressure clamp or KS cable adapters) before field wiring execution.
Frequently Asked Questions
Does the AAI143-H50 support both 2-wire and 4-wire transmitters?
Yes. 2-wire or 4-wire transmitter configurations are selectable on a per-channel basis via internal pin or software configuration settings.
Can this module pass HART data to the CENTUM engineering station?
Yes. The “-H” designation indicates built-in digital communication support, allowing HART variables and diagnostic parameters to pass through to the control system without requiring separate multiplexer hardware.
What terminal blocks are compatible with this module?
The module connects to field wiring via dedicated Yokogawa pressure clamp terminal blocks (such as ATA4S or ATA4D series) or KS cable interface adapters depending on the ordered option code.
| 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 |
