Yokogawa AAI143-H50K4A00

Product Brief Introduction

High-density 16-channel analog acquisition card for Yokogawa CENTUM VP DCS system, integrated HART two-way digital communication function, realize real-time measurement of 4–20 mA loop transmitters and remote parameter reading/writing of HART field instruments, suffix H50 represents HART communication enabled non-explosion type, K4A00 matched KS dedicated cable interface adapter ATK4A-00.
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Description

Technical & Performance Parameters

  • Input Channel Quantity: 16 fully isolated 4–20 mA current input channels
  • A/D Conversion Resolution: 16-bit high precision
  • Basic Measurement Accuracy: ±16 µA @ 20 mA standard signal (±0.1% FS @ 25°C)
  • Allowable Maximum Input Current: 24 mA (over-range fault detection threshold)
  • Transmitter Loop Power Supply Output: 19.0 V ~ 25.5 V DC two-wire transmitter power supply
  • Channel-System Isolation Withstand Voltage: 1500 V AC, 1 minute insulation test
  • HART Communication Compatibility: HART 5 / HART 7 protocol two-way digital communication
  • Data Update Period: Fixed 10 ms fast sampling refresh
  • Module Operating Power Supply: 24 V DC backplane bus, total power consumption 5 W
  • Operating Temperature Range: -20 °C ~ +70 °C
  • Storage Temperature Range: -40 °C ~ +85 °C
  • Physical Dimensions: 30 mm (W) × 180 mm (H) × 140 mm (D)
  • Net Weight: 0.5 kg
  • Certifications: CE, UL, CSA industrial safety certification

Material Composition

  1. Outer frame: Flame retardant high-strength black engineering plastic injection molding shell
  2. Main circuit board: Multi-layer low-noise FR4 PCB with full-board anti-interference coating
  3. Channel isolation device: High insulation miniature isolation transformer per channel
  4. HART communication demodulation chip: Special industrial HART modem integrated circuit
  5. KS cable interface terminal: Gold-plated multi-core aviation plug matched with ATK4A-00 adapter
  6. Internal power components: Low ripple isolated DC-DC power supply chip for each channel loop power

Structural Characteristics

  1. High-density 16-channel single module design, double channel quantity compared with AAI141 to save cabinet slot resources
  2. Front panel equipped with 16-channel independent signal running LED + module HART communication status indicator
  3. K4A00 option reserved dedicated KS cable aviation plug interface, matched ATK4A-00 adapter for centralized wiring
  4. Each channel independent isolated power supply circuit, mutual non-interference between different transmitter loops
  5. Built-in independent HART communication processing chip, no occupation of DCS main controller operation resources
  6. Dual anti-loosening lock buckles on both sides, adapt to long-term vibration of industrial control cabinet

Working Principle

  1. Two-wire HART field transmitters connect to module channel via KS cable and ATK4A-00 interface adapter
  2. Module internal 19–25.5 V DC isolated power supply provides loop power for each transmitter
  3. 4–20 mA analog measurement signal enters isolation transformer for electrical isolation filtering
  4. 16-bit A/D chip converts analog current signal into digital measurement data, upload to CENTUM VP main controller via ESB bus every 10 ms
  5. HART modem chip superimposes digital communication signal on 4–20 mA analog loop, realize two-way data interaction with field HART instruments
  6. Support remote reading of transmitter diagnostic data, range parameter modification and fault code query through DCS upper computer
  7. Real-time detect loop open circuit (<0.65 mA) and over-range (>24 mA) faults, trigger corresponding channel alarm indicator

Core Function Features

  1. 16-channel high-density single-module design, greatly reduce DCS cabinet module installation quantity
  2. Built-in HART 5/7 two-way communication, realize full digital remote configuration and diagnosis of smart transmitters
  3. Independent isolated loop power supply for each channel, support standard two-wire 4–20 mA transmitters
  4. 10 ms ultra-fast data update period, suitable for fast dynamic process parameter monitoring
  5. 1500 V AC high insulation isolation between field loop and DCS system, completely block ground loop interference
  6. K4A00 KS cable centralized wiring option, simplify multi-channel field wiring arrangement
  7. Support dual redundant hot backup configuration for high-reliability safety instrument systems

Advantage Highlights

  1. Double channel density of conventional 8-channel modules, effectively save DCS cabinet space and investment cost
  2. Integrated HART communication without additional external HART gateway equipment, reduce system wiring complexity
  3. Ultra-fast 10 ms data refresh speed, meet high dynamic process closed-loop control response requirements
  4. High 1500 V AC isolation withstand voltage, adapt to strong electromagnetic interference heavy industrial site
  5. Matched KS cable centralized wiring system, convenient on-site wiring construction and later maintenance
  6. Multi-national standard safety certification, applicable to global petrochemical, power and energy industrial projects

Applicable Industries

Petrochemical refining, natural gas transmission station, thermal power plant, nuclear power auxiliary control, pharmaceutical chemical, offshore oil platform process control

Installation Requirements

  1. Install in dedicated analog input slot of Yokogawa CENTUM VP backplane, lock side buckles after insertion
  2. Match ATK4A-00 KS cable interface adapter for K4A00 option wiring, strictly follow pin definition sequence
  3. Field HART transmitter wiring adopts shielded twisted pair, single-point grounding of shielding layer inside cabinet
  4. Reserve ≥10 mm vertical heat dissipation gap between adjacent modules to avoid heat accumulation
  5. For intrinsically safe hazardous area application, install matched HART isolation safety barrier on front end of each channel
  6. Cabinet operating ambient temperature must maintain within -20°C ~ +70°C, install forced air cooling for high temperature workshop

Usage Precautions

  1. Do not access AC high voltage signal to channel wiring, will burn internal isolation transformer and HART modem chip
  2. HART communication wiring cannot share cable with strong electric power line, avoid digital signal distortion
  3. Regularly check KS aviation plug wiring tightness every 3 months, vibration causes poor communication contact
  4. Strictly prohibit reverse connection of backplane 24 V DC power supply terminal, permanent module power circuit damage
  5. Do not disassemble plastic shell without authorization, internal channel isolation structure will be damaged
  6. When HART communication failure occurs, first check loop current signal continuity before troubleshooting module and adapter
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