YokogawaCENTUM VP FIO

Yokogawa AAI143-H50/K4A00 16-Channel Isolated HART Analog Input Module

Product identityHART

Product identity

Product Summary

Yokogawa AAI143-H50/K4A00 is a 16-channel isolated analog input module for 4 to 20 mA field signals with HART communication. Each input channel is isolated, allowing the module to convert process current into Field Control Station data while keeping the specified channel separation.

The H suffix in Yokogawa AAI143-H50/K4A00 identifies the HART-capable version. Process values enter the FCS I/O image and HART variables are handled through the HART communication function, so control data and device information can be used without treating them as the same signal path.

The 50 suffix of Yokogawa AAI143-H50/K4A00 indicates the basic, non-explosion-protected hardware with the applicable status-display style, while /K4A00 specifies the ATK4A-00 KS cable interface adapter for the AEA4D terminal board. The full suffix and option string defines the delivered connection arrangement.

Yokogawa manual crop showing process data flow for HART communication used by the AAI143-H module

Technical record

Specification Details

Specification	AAI143-H50/K4A00
Brand	Yokogawa
Product Name	16-Channel Isolated HART Analog Input Module
Country	Japan
System family	CENTUM VP / FIO
Input channels	16, isolated
Input signal	4 to 20 mA DC
Allowable input current	24 mA
Input resistance, power ON	270 Ω at 20 mA to 350 Ω at 4 mA
Input resistance, power OFF	500 kΩ or greater
Accuracy	±16 µA
Data update period	10 ms
Step response time	100 ms
Withstand voltage	1500 V AC between input and system for 1 minute
HART communication	Available
Connection option	/K4A00: ATK4A-00 KS cable interface adapter

Sixteen current inputs

Isolated Signal Acquisition

AAI143-H receives standardized current signals while maintaining channel isolation and a defined conversion path into the FCS.

Current loop input

Each channel accepts 4 to 20 mA and is evaluated against the specified input resistance and allowable current. Loop power and transmitter headroom remain field-design checks.

Channel isolation

The isolated-channel architecture reduces direct coupling between field loops. Shielding, grounding and barrier selection still follow the installation design.

FCS data image

Converted current values are placed in the control-system I/O image for regulatory or sequence functions. Scaling and bad-signal handling are configured per channel.

Device variables alongside process data

HART Data Path

HART communication adds device information to the analog measurement path without replacing the 4-20 mA control value.

HART variables

Supported HART variables are exchanged through the module communication function and made available to the FCS environment for device monitoring or management.

Control reference

The regulatory and sequence blocks reference the I/O image, preserving the process-value path while HART data remains associated with the field device.

KS cable option

The /K4A00 option identifies the ATK4A-00 adapter and AEA4D terminal-board connection. Cable and terminal-board identity are verified together.

Practical checks

Questions & Answers

Why does Yokogawa AAI143-H50/K4A00 show 0 mA even though the transmitter is powered?

For Yokogawa AAI143-H50/K4A00, measure the loop at the assigned channel, verify polarity and continuity through the ATK4A-00/AEA4D path, then compare the FCS channel assignment and scaling.

Why are HART variables unavailable from Yokogawa AAI143-H50/K4A00 while the 4-20 mA value is valid?

Yokogawa AAI143-H50/K4A00 can pass the analog value even when HART communication is not established. Check HART support in the node, channel configuration, loop impedance and device HART settings.

Can a Zener barrier be inserted directly ahead of Yokogawa AAI143-H50/K4A00?

The Yokogawa AAI143-H50/K4A00 documentation does not permit a Zener barrier for this module in an intrinsically safe application; use the specified isolation-barrier approach and approved system design.

What does /K4A00 control on Yokogawa AAI143-H50/K4A00?

On Yokogawa AAI143-H50/K4A00, /K4A00 specifies the ATK4A-00 KS cable interface adapter used with the AEA4D terminal board. Inspect the adapter and board, not only the I/O module.

How should a drifting Yokogawa AAI143-H50/K4A00 channel be isolated?

Swap the field loop to a known input only under an approved test plan, then compare Yokogawa AAI143-H50/K4A00 raw current, configured range, terminal resistance, grounding and transmitter output to separate field drift from channel behavior.

Why must the complete Yokogawa AAI143-H50/K4A00 suffix be retained in a spare request?

Yokogawa AAI143-H50/K4A00 combines HART capability, hardware style and the KS cable adapter option. Shortening the request to AAI143 can produce a different connection and protection arrangement.

Moore Automation

Shipping Services

Moore Automation

https://www.mvme.cn

Moore Automation coordinates packing and shipment records for industrial I/O modules, adapters and associated terminal hardware. The full Yokogawa option code can remain visible on the packing list and receiving note.

Shipment updates can include carrier information and package status, while handling notes call attention to connector protection and electrostatic precautions for the module and adapter.

Connector-safe packingOption-code packing listsCarrier status coordinationReceiving-note preparation

Mixed-brand selection

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Direct enquiry

Contact Details

CompanyMoore Automation

Sales ManagerLeonia

Emailsales@mvme.cn

WhatsApp+86 180 3017 5807

Product Name	Yokogawa AAI143-H50/K4A00 16-Channel Isolated HART Analog Input Module
Item NO.	2932017
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	ABB
Brand	ABB
Creation Time	2026-11-12

Yokogawa AAI143-H50/K4A00 16-Channel Isolated HART Analog Input Module Item NO.: 2932017

Yokogawa AAI143-H50/K4A00 16-Channel Isolated HART Analog Input Module

Product Summary

Specification Details

Isolated Signal Acquisition

Current loop input

Channel isolation

FCS data image

HART Data Path

HART variables

Control reference

KS cable option

Questions & Answers

Shipping Services

Moore Automation

Suggested Products

Contact Details

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