Honeywell MC-PAIH03

Product Name​
Honeywell MC-PAIH03 High-Level Analog Input Module
Product Introduction​
The MC-PAIH03 is a high-level analog input processor for Honeywell process control systems. It acquires field transmitter signals and converts them into digital process data for Experion PKS, TPS and TDC-series controllers, supporting HART communication in configured systems.
Category:
Description
Technical Specifications​
  • Model: MC-PAIH03
  • Channels: 16 analog input channels
  • Current input: 4 mA to 20 mA standard, configurable 0 mA to 20 mA and 0 mA to 24 mA
  • Voltage input: 0 V to 5 V, 1 V to 5 V, 0.4 V to 2 V configurable ranges
  • Input resistor for 4-20 mA: 250 Ω with HART modem option
  • A/D conversion: 16-bit resolution
  • Accuracy: ±0.1% span for HART/Experion configuration, ±0.075% full scale for high-level processor configuration
  • Common-mode rejection: 70 dB to 80 dB at 50/60 Hz depending on firmware
  • Scan rate: 4 samples per second per channel typical
  • Isolation: channel-to-ground and channel-to-channel, 250 Vrms minimum for PKS builds
  • Diagnostics: open circuit, overrange, underrange, sensor fault and module health
  • Operating temperature: 0°C to 60°C control-room build
Functional Features​
  • High-density 16-channel design reduces I/O cabinet space
  • HART digital communication overlay on 4-20 mA loops in PKS systems
  • Per-channel galvanic isolation prevents ground-loop errors
  • Automatic fault detection for wiring and transmitter failure
  • Backplane communication with C300, PM, APM, HPM or equivalent controllers
Application Scenarios​
  • Pressure, differential pressure and level transmitter acquisition
  • Temperature transmitter loops using 4-20 mA outputs
  • Flow measurement with HART field devices
  • Refinery, petrochemical, power and water treatment plants
  • Batch and continuous process control rooms
Performance Parameters​
  • 16-bit conversion delivers fine resolution for 4-20 mA spans
  • High common-mode rejection maintains signal integrity in noisy plants
  • HART support enables device diagnostics without separate communicator
  • Isolation rating supports mixed grounding systems and long field cables
Material And Construction​
  • Industrial PCB assembly in plastronic module housing
  • Gold-plated backplane connectors for reliable bus contact
  • Channel isolation components and HART coupling circuitry
  • DIN or rack mounting carrier according to system IOTA type
Working Principle​
Each input channel receives current or voltage from the field transmitter. A precision resistor converts current to voltage when required, the signal passes through isolation amplifiers and anti-aliasing filters, then a 16-bit ADC digitizes the value. The module appends HART digital data when enabled, performs range and fault checks, and transfers processed values to the controller through the system backplane.
Installation Requirements​
  • Install in designated Honeywell I/O carrier, IOTA or FTA base
  • Use shielded twisted pair for 4-20 mA loops with shield grounded at one point
  • Match transmitter power and resistor configuration before channel activation
  • Connect HART-enabled loops only with compatible system firmware
  • Verify ground separation and isolation requirements with system drawings
Usage Precautions​
  • Do not apply voltages above channel rating or exceed 30 V differential on unprotected inputs
  • Confirm 250 Ω HART resistor presence before HART commissioning
  • Replace module only with same firmware and IOTA compatibility
  • Perform loop simulation before connecting live transmitters
  • Keep cabinet temperature within specified operating limits
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