YOKOGAWA AAI143-S50

Description

1. Product Description

2. Key Technical Parameters

Parameter	Specification
Model	AAI143-S50
Input Signal	4–20 mA (2-wire/4-wire transmitters)
Channels	16 (isolated)
Isolation Voltage	1500 V AC (input to system)
Accuracy	±16 µA (±0.08% of full scale)
Data Update Rate	10 ms/channel
Transmitter Power Supply	19.0–25.5 V DC (25 mA max current)
Power Supply	24 V DC (system) + 5 V DC (module)
Operating Temperature	-10°C to +60°C
Weight	0.3 kg
Redundancy Support	Dual redundant configuration
HART Compatibility	Optional (with compatible DCS firmware)

AAI143-S50

3. Advantages and Features

• High Reliability & Isolation: Channel-to-channel and system isolation (1500 V AC) minimizes noise interference, ensuring accurate signal transmission in harsh industrial settings.
• Precision Performance: ±16 µA accuracy and 16-bit A/D conversion enable precise monitoring of critical processes (e.g., temperature, pressure, flow).
• Flexible Configuration: Supports dual redundancy for fault tolerance and adapts to 2-wire/4-wire transmitters via channel-specific settings.
• Modular Design: Easy installation and replacement with optional accessories (e.g., pressure clamp terminals, cables) for simplified maintenance.
• Wide Compatibility: Works with YOKOGAWA’s DCS systems (Centum VP/CS 3000) and integrates with HART-enabled devices for advanced diagnostics.

4. Application Areas and Use Cases

• Industries: Manufacturing, oil & gas, power generation, chemical processing, and water treatment.
• Scenarios: Monitoring analog signals from transmitters (e.g., flow meters, pressure sensors) in DCS/FCS systems.
• Case Study: A chemical plant in China upgraded its DCS with the AAI143-S50 to manage 16 temperature sensors. The module’s isolation and precision reduced signal errors by 95%, improving process stability and reducing downtime.

5. Competitor Comparison

• Higher Channel Density: 16 channels (vs. 8–12 channels in many alternatives).
• Superior Isolation: 1500 V AC isolation (exceeding industry standards for noise immunity).
• Redundancy Flexibility: Native support for dual redundancy without additional hardware.
• Wide Voltage Range: Transmitter power supply (19–25.5 V DC) accommodates older and newer field devices.
  

  AAI143-S50

6. Selection Recommendations

• Channel Requirements: Choose the AAI143-S50 for systems needing 16 isolated channels; opt for lower-channel models (e.g., AAI135) for smaller setups.
• Environment: Non-explosive environments (suffix “-S50” indicates no explosion protection; use 防爆型号 for hazardous areas).
• Compatibility: Ensure DCS firmware (e.g., EB401 Rev. 2+) supports HART if enabled.
• Budget: Balance cost with features (e.g., HART compatibility adds diagnostic capabilities at a moderate premium).

7. Installation and Maintenance Notes

• Wiring: Use shielded cables and separate signal/ power wiring to minimize interference.
• Redundancy: Follow YOKOGAWA’s dual redundancy guidelines for correct pairing and configuration.
• Environment: Avoid temperatures >60°C and ensure proper ventilation.
• Calibration: Periodically verify accuracy using HART tools (if equipped) or factory procedures.
• Spare Parts: Stock compatible accessories (e.g., A4S00 terminals, KS1 cables) for quick replacements.