Yokogawa AAI141-H50/K4A00 CENTUM VP 16-Channel HART Analog Input Module

Product Description

The AAI141-H50/K4A00 (Part Number AAI141-H50/K4A00) is a high-density analog input interface designed for the Yokogawa CENTUM VP distributed control system. This module supports up to 16 channels of 4 to 20 mA DC signals, providing a versatile solution for large-scale industrial data acquisition. Engineered for precision, it effectively handles both 2-wire and 4-wire transmitter configurations, ensuring seamless integration with a wide variety of field instrumentation.

Featuring integrated HART digital communication (denoted by the -H suffix), the AAI141-H50/K4A00 allows for the transmission of device diagnostics and secondary process variables alongside the primary analog signal. This specific assembly includes the ATK4A-00 KS Cable Interface Adapter, which optimizes cabinet space and simplifies wiring through pre-fabricated multi-core cable connections. The module's rapid update cycle and low thermal drift make it an essential component for high-speed, safety-critical process monitoring.

Technical Specifications

• Input Channels 16 channels, non-isolated, 4 to 20 mA DC

• Digital Communication HART Protocol support for smart device management

• Data Refresh Rate 10 ms internal update period

• Signal Accuracy ±16 μA (at 23°C ± 2°C)

• Input Impedance 250 Ω (Note: 400 Ω to 1000 Ω is typical for total loop impedance including field wiring)

• Step Response 100 ms typical

• Transmitter Power Supply 14.8 V to 26.4 V DC

• Input Protection 27 mA current limit per channel

• Thermal Stability Temperature drift of ±16 μA per 10°C change

• Power Requirements 310 mA at 5 V DC and 450 mA at 24 V DC

• Connection Interface KS Cable Interface Adapter (ATK4A-00)

• Operating Temperature -20°C to 70°C

• Physical Profile 0.2 kg lightweight compact form factor

Configuration and Suffix Details

• AAI141 Base 16-channel current input model

• -H Digital communication enabled via HART protocol

• 5 Standard design without explosion-proof certification

• 0 Basic hardware version

• /K4A00 Integrated assembly with the ATK4A-00 KS cable adapter

Application Scenarios

• High-density monitoring of pressure, temperature, and flow transmitters in refineries.

• Real-time data acquisition for fast-acting control loops in power generation.

• Integration of HART-enabled smart instruments for predictive maintenance and asset management.

• Optimized wiring installations using KS multi-core cables to reduce panel footprint.

Technical FAQ

Can this module power 2-wire field transmitters?

Yes, the AAI141-H50/K4A00 provides a built-in transmitter power supply (14.8 to 26.4 V DC), allowing it to directly power 2-wire instruments without an external power source.

What is the benefit of the /K4A00 interface?

The /K4A00 option replaces standard terminal blocks with a KS Cable Interface. This allows the module to connect to terminal boards via high-density cables, significantly reducing the risk of manual wiring errors and shortening the commissioning timeline.

Is there isolation between the 16 channels?

The AAI141-H50/K4A00 is a non-isolated module (common ground). For applications requiring channel-to-channel isolation to prevent ground loops, the AAI135 series is the recommended alternative.