AAI143-H53/K4A00 Yokogawa Analog Input Card AAI143 Isolated 4–20mA

Yokogawa AAI143-H53/K4A00 Analog Input Module Overview

AAI143-H53/K4A00 is a 16-channel isolated analog input module from Yokogawa.
It reads 4–20 mA signals with high accuracy and fast response.
It supports HART and fits Yokogawa Centum VP systems.
And It works well in harsh and high-noise plants.

Identity And Build Details

• Manufacturer: Yokogawa
• Product number: AAI143-H53/K4A00
• Module type: Analog input module
• Series: AAI143 isolated input family
• Channel count: 16 isolated inputs
• Signal class: 4–20 mA DC loops
• Weight: 0.3 kg
• Compact slot design

Signal And Measurement Specs

• Input range: 4 to 20 mA
• Max allowable current: 24 mA
• Accuracy: ±16 µA typical
• Conversion refresh: 10 ms
• Resolution: high precision A/D conversion
• Repeatability: stable across cycles
• Linearity error: very low in working span
• Channel isolation: full isolation per loop

Electrical Characteristics

• Input resistance ON: 270–350 ohm
• Input resistance OFF: ≥500 kΩ
• Withstand voltage: 1500 V AC, 1 minute
• Isolation between input and system
• Strong noise rejection design
• Good for long cable runs

Loop Power And Field Support

• Transmitter supply: ≥19.0 V at 20 mA
• Transmitter supply: ≤25.5 V at 0 mA
• Loop current limit: 25 mA
• 2-wire transmitter supported
• 4-wire transmitter supported
• Mode set by channel pin
• No software setting needed

Environmental And Stability Data

• Temperature option: −20 to 70 °C
• G3 conformal coating option
• Drift: ±16 µA per 10 °C
• Good for humid air sites
• Good for corrosive areas
• Stable under cabinet heat

Power Consumption

• 230 mA at 5 V DC
• 540 mA at 24 V DC
• Balanced load design
• Low internal loss

Communication And Wiring

• HART digital communication included
• Pressure clamp terminals supported
• MIL connector cable supported
• KS1 dedicated cable supported
• Option /K4A00 KS adapter included
• Adapter model: ATK4A-00
• Connects to AEA4D terminal board

Main Selling Points

• High channel count with isolation
• Fast 10 ms update speed
• Built-in HART access
• Strong surge tolerance
• Wide temperature rating
• Easy field wiring
• Good for critical loops
• Trusted Yokogawa platform part

Delivery Scope

• 1 × AAI143-H53/K4A00 module
• KS cable interface adapter
• Factory inspection label
• Safe anti-static packing

Warranty And Shipping

• Warranty: 12 months
• Tested before dispatch
• Worldwide shipping service
• Courier: FedEx, UPS, DHL
• Tracking number provided

Professional FAQ And Selection Help

• When should I choose isolated inputs instead of non-isolated
• Use isolated inputs when loops share different grounds.
• Is this module good for safety critical signals
• Yes. Isolation and accuracy help protect signal quality.
• Can I use it with smart HART positioners
• Yes. HART data can pass through each channel.
• What field issue happens most during install
• Wrong pin setting for 2-wire or 4-wire mode.
• How do I size cabinet power for this card
• Add 24V and 5V current values with margin.

Contact Information Inquiries:
info@oiltechcontrols.com ,
+86 158 8020 0923

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