Product Overview

The Yokogawa AAI143-S50 is a 16-channel analog input module. This module accepts 4 to 20 mA signals from field devices. All 16 channels are fully isolated from each other. The module provides a transmitter power supply for 2-wire sensors. You can set each channel for 2-wire or 4-wire transmitters using pins. This module has no explosion protection (S suffix code 5). It is a basic type with standard specifications.

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Part Number Breakdown (Tree Structure)

• AAI143 → Model Series
  • Analog Input Module
  • 4 to 20 mA signal type
  • 16-channel configuration
  • Isolated channels
• S → Suffix Code 1 (Type)
  • Standard type
• 5 → Suffix Code 2 (Explosion Protection)
  • No explosion protection
  • For non-hazardous areas only
• 0 → Suffix Code 3 (Version)
  • Basic type
  • Standard specifications

Key Specifications

• Brand: Yokogawa
• Part Number: Yokogawa AAI143-S50
• Product Type: Analog Input Module
• Model: AAI143 - Analog Input Module
• Number of Channels: 16 isolated channels
• Input Signal: 4 to 20 mA
• Allowable Input Current: 24 mA maximum
• Weight: 0.3 kg

Input Characteristics

• Input Resistance (Power ON): 270 Ω at 20 mA to 350 Ω at 4 mA
• Input Resistance (Power OFF): 500 kΩ or larger
• Accuracy: ±16 µA
• Data Update Period: 10 milliseconds
• Drift (Temperature Change): ±16 µA per 10°C

Transmitter Power Supply

• Voltage at 20 mA: 19.0 V or higher
• Voltage at 0 mA: 25.5 V or less
• Output Current Limit: 25 mA
• 2-wire or 4-wire Setting: Per channel using setting pins

Isolation and Protection

• Withstanding Voltage: 1500 V AC for 1 minute (between input and system)
• Channel Isolation: Each channel fully isolated
• Explosion Protection: None (Suffix code 5)

Power Consumption

• Maximum Current (5 V DC): 230 mA
• Maximum Current (24 V DC): 540 mA

External Communication and Connections

• Pressure clamp terminal
• MIL connector cable
• Dedicated cable (KS1)

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 the pressure clamp terminals.
• Use MIL connector cable or KS1 dedicated cable for system connection.
• Verify input current does not exceed 24 mA per channel.
• Allow proper ventilation for heat dissipation.
• Apply power and check module status indicators.

Maintenance Tips

• Check input signal levels periodically.
• Inspect terminal connections for looseness.
• Keep module dry and free from dust.
• Verify accuracy every 12 months.
• Replace module if drift exceeds ±16 µA per 10°C.

Application Scenarios

• Process control systems needing 4-20 mA inputs
• Pressure and temperature transmitter monitoring
• Flow meter signal acquisition
• Level transmitter interface
• PLC and DCS analog input expansion
• Industrial automation with Yokogawa systems

Diagnostic Capabilities

• Monitor input current per channel.
• Check for open circuit or short circuit conditions.
• Use data update every 10 ms for fast response.
• Track temperature drift for accuracy compensation.
• Verify transmitter power supply voltage is within range.

Compatibility Notes

• Works with Yokogawa DCS and PLC systems.
• Use with 2-wire or 4-wire transmitters (set per channel).
• No explosion protection for hazardous areas.
• Requires MIL connector or KS1 cable for external communication.

Package Contents

• One Yokogawa AAI143-S50 analog input module
• 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 AAI143-S50 have?

The Yokogawa AAI143-S50 has 16 analog input channels. Each channel is fully isolated. All channels accept 4 to 20 mA signals.

Q2: Can I use this module with 2-wire transmitters?

Yes, this module works with 2-wire transmitters. It also works with 4-wire transmitters. You set each channel individually using the setting pins.

Q3: What is the accuracy of the AAI143-S50?

Accuracy is ±16 µA at room temperature. Temperature drift adds ±16 µA per 10°C change. The data update period is 10 milliseconds.

Q4: What is the withstand voltage rating?

The withstand voltage is 1500 V AC for 1 minute. This rating applies between input channels and system. This provides good isolation for industrial environments.

Q5: Does the AAI143-S50 have explosion protection?

No, suffix code 5 means no explosion protection. This module suits non-hazardous areas only. For hazardous areas, choose a different suffix code.

Buying Guide

When you buy a Yokogawa AAI143-S50 analog input module, follow these tips. First, count your analog input needs. This module gives 16 channels. Second, check your signal type. This module accepts 4-20 mA only. Third, verify your transmitter type. Use setting pins for 2-wire or 4-wire. Fourth, confirm your area classification. This module has no explosion protection. Fifth, calculate your power budget. The module draws 230 mA at 5V and 540 mA at 24V. Sixth, check your update speed needs. The module updates every 10 ms. Seventh, plan your wiring. Use pressure clamp terminals or MIL cable. Eighth, review warranty terms. We offer 12 months coverage. Ninth, choose your shipping method. We use FedEx, UPS, and DHL. Finally, test each channel before full system integration.

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