PLCs, Power Supplies & Others

The Honeywell 8U-PAIH54is a 16-channel analog input module designed for the Honeywell Experion LX Series 8 I/O family. This conformal-coated module accepts voltage, current, single-ended, and differential input signals. It delivers reliable signal acquisition in harsh industrial environments with full HART digital communication support.

Key Technical Specifications

Conformal Coating for Harsh Environment Reliability

The 8U-PAIH54 features factory-applied conformal coating on all electronic circuitry. This protective layer resists moisture, chemical vapors, dust, and extreme temperature fluctuations. You therefore install this module in non-conditioned shelters and outdoor cabinets with confidence. The coating significantly extends service life in pulp, paper, and refining applications.

Sixteen Channels with Flexible Input Configuration

Each of the sixteen channels accepts voltage or current signals without hardware reconfiguration. You connect 2-wire loop-powered transmitters directly to the module. Self-powered transmitters and differential voltage sources also interface seamlessly. The 8U-PAIH54 therefore replaces multiple dedicated module types.

16-Bit Resolution for Precision Measurement

This module utilizes a 16-bit analog-to-digital converter across all input ranges. You achieve fine granularity even at low end of scale. The 0.4–2 V range provides enhanced resolution for specialized measurements. Consequently, the 8C-PAIH54 suits custody transfer and quality-critical applications.

Integrated HART Communication

Every analog input channel supports simultaneous HART digital communication. You access device diagnostics, calibration data, and secondary variables directly from Experion LX. The 8C-PAIH54 eliminates external HART multiplexers and associated wiring. This integration reduces both capital expenditure and ongoing maintenance.

Superior Noise Rejection Specifications

The module delivers 70 dB common mode rejection across -6 V to +5 V peak common mode voltage. Normal mode rejection reaches 19 dB with a 6.5 Hz single-pole RC filter. You therefore obtain clean signals even in electrically noisy environments. Crosstalk between channels remains below -60 dB.

High Input Impedance for Voltage Measurements

Voltage inputs present greater than 10 megohms impedance when powered. This high impedance minimizes circuit loading on sensitive transmitters. You connect multiple monitoring devices to the same signal source without degradation. The 8C-PAIH54 therefore suits analyzer systems and laboratory instruments.

Current Input via Precision Shunt

The module accepts 4–20 mA signals through an internal 250 ohm precision resistor. This value complies with HART physical layer specifications. You therefore achieve accurate current measurement and reliable digital communication simultaneously. External burden resistors become unnecessary.

System Integration with Experion LX

You mount the 8U-PAIH54 directly into Honeywell Experion LX Series 8 I/O racks. The system automatically discovers the module upon insertion. Configuration parameters download from the controller without manual intervention. This plug-and-play operation accelerates commissioning and reduces errors.

Energy Storage and Maintenance

This module contains no internal batteries or supercapacitors. You therefore eliminate periodic replacement procedures. All configuration data resides in non-volatile controller memory. Module replacement requires no recalibration or special tools.

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