Product Overview

The Yokogawa AAI141-S50/K4A00 is a 16-channel analog input module. This module accepts 4 to 20 mA signals from field devices. The channels are non-isolated for cost-effective applications. HART protocol communication is available on this module. A KS cable interface adapter (K4A00) comes included. This module has no explosion protection (suffix code 5).

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Part Number Breakdown (Tree Structure)

• AAI141 → Model Series
  • Analog Input Module
  • 4 to 20 mA signal type
  • 16-channel configuration
  • Non-isolated channels
• S → Suffix Code 1 (Communication)
  • Standard type communication
  • HART protocol supported
• 5 → Suffix Code 2 (Explosion Protection)
  • No explosion protection
  • For non-hazardous areas only
• 0 → Suffix Code 3 (Version)
  • Basic type
  • Standard specifications
• K4A00 → Option Code
  • KS cable interface adapter included

Key Specifications

• Brand: Yokogawa
• Part Number: Yokogawa AAI141-S50/K4A00
• Product Type: Analog I/O Module (Input)
• Model: AAI141
• Number of Channels: 16 channels (non-isolated)
• Input Signal: 4 to 20 mADC
• Allowable Input Current: 27 mA maximum
• Weight: 0.2 kg

Input Resistance Characteristics

• Power ON: 400 Ω at 20 mA to 1000 Ω at 4 mA
• Power OFF: 500 kΩ or larger

Accuracy and Performance

• Accuracy: ±16 µA
• Data Update Period: 10 milliseconds
• Step Response Time: 100 milliseconds
• Drift (Temperature Change): ±16 µA per 10°C

Transmitter Power Supply

• Voltage at 20 mA: 14.8 V or higher
• Voltage at 0 mA: 26.4 V or less
• Output Current Limit: 27 mA
• 2-wire or 4-wire Setting: Per channel using setting pins

Power Consumption

• Maximum Current (5V DC): 310 mA
• Maximum Current (24V DC): 450 mA

Communication Feature

• HART Protocol: Available and supported
• Enables digital communication over 4-20 mA loops
• Reads device status and diagnostics from HART transmitters

External Connections

• Pressure clamp terminal
• KS cable (adapter K4A00 included)
• MIL connector cable

Installation Guide

• Turn off all power before installation.
• Mount the module in the designated slot.
• Set each channel for 2-wire or 4-wire using setting pins.
• Connect field device wires to pressure clamp terminals.
• Attach the KS cable interface adapter (K4A00) if needed.
• Use MIL connector cable for system connection.
• Verify input current does not exceed 27 mA per channel.
• For HART communication, ensure proper loop impedance.
• Apply power and check module status indicators.

Maintenance Tips

• Check input signal levels periodically.
• Inspect pressure clamp terminals for loose wires.
• Verify HART communication every 3 months.
• Keep module dry and free from dust.
• Replace module if accuracy drifts beyond ±16 µA.

Application Scenarios

• Process control with HART smart transmitters
• Pressure, temperature, and flow monitoring
• Cost-effective analog input applications (non-isolated)
• PLC and DCS analog input expansion
• Industrial automation with Yokogawa systems
• Retrofit projects needing HART communication

Diagnostic Capabilities

• Monitor input current per channel via system software.
• Use HART to read transmitter diagnostic data.
• Check for open circuit or short circuit conditions.
• Track temperature drift for accuracy compensation.
• Verify transmitter power supply voltage is within range.

Compatibility Notes

• Works with Yokogawa DCS and PLC systems.
• HART communication requires compatible host system.
• No explosion protection for hazardous areas.
• Non-isolated channels share a common reference.
• Use with 2-wire or 4-wire transmitters (set per channel).

Package Contents

• One Yokogawa AAI141-S50/K4A00 analog input module
• One KS cable interface adapter (K4A00 option)
• One setting pin set for 2-wire/4-wire configuration
• One pressure clamp terminal (attached)
• One product label

Warranty and Shipping

• 12 months factory warranty from shipment date.
• Warranty covers manufacturing defects only.
• Overcurrent or wrong wiring voids the warranty.
• Shipping options: FedEx, UPS, DHL.
• Tracking number provided after shipment.

Frequently Asked Questions (FAQ)

Q1: How many channels does the AAI141-S50/K4A00 have?

The Yokogawa AAI141-S50/K4A00 has 16 analog input channels. The channels are non-isolated. Each channel accepts 4 to 20 mA signals.

Q2: Does this module support HART communication?

Yes, suffix code S enables HART protocol communication. You can read digital data from HART transmitters. The analog signal remains 4-20 mA for control.

Q3: What is the difference between AAI141 and AAI143?

AAI141 has non-isolated channels for lower cost. AAI143 has isolated channels for better noise immunity. Choose based on your application needs and budget.

Q4: What is included with the K4A00 option?

The K4A00 option includes a KS cable interface adapter. This adapter simplifies connection to Yokogawa systems. It is pre-configured for plug-and-play installation.

Q5: What is the step response time of this module?

The step response time is 100 milliseconds. Data update period is 10 milliseconds. Accuracy is ±16 µA at room temperature.

Buying Guide

When you buy a Yokogawa AAI141-S50/K4A00 analog input module, follow these tips. First, count your analog input needs. This module gives 16 channels. Second, check if isolation is required. This module is non-isolated. Third, verify your HART needs. This module supports HART communication. Fourth, confirm your area classification. This module has no explosion protection. Fifth, calculate your power budget. The module draws 310 mA at 5V and 450 mA at 24V. Sixth, check your response time requirement. Step response is 100 ms, update is 10 ms. Seventh, choose your connection method. Use pressure clamp, MIL, or KS cable. Eighth, verify the K4A00 adapter is included. This option simplifies installation. Ninth, review warranty terms. We offer 12 months coverage. Tenth, choose your shipping method. We use FedEx, UPS, and DHL. Finally, test HART communication before full system integration.

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