Honeywell Series 8 8C-PAIHA1 Analog Input Module with HART

Product Overview

The Honeywell 8C-PAIHA1 (8CPAIHA1) is a high-density Analog Input module featuring integrated HART communication, specifically designed for the Experion PKS Series 8 I/O platform. This module is an essential component for modern industrial process control, supporting 16 channels of single-ended analog signals. By combining standard 4-20 mA data acquisition with the Highway Addressable Remote Transducer (HART) protocol, the 8C-PAIHA1 allows the DCS to access advanced field device diagnostics, secondary variables, and configuration data directly through the I/O bus. Its "Series 8" form factor is engineered for vertical mounting, which optimizes cabinet airflow and provides a compact footprint for large-scale deployments in oil refineries, chemical plants, and power generation facilities.

Technical Configuration

The 8C-PAIHA1 is built for high-reliability mission-critical applications with a focus on data integrity and ease of maintenance.

• Single-Ended Architecture: Optimizes channel density by using a common return path, allowing for 16 high-precision inputs in a single slim module.

• HART Pass-Through: Each channel supports bidirectional digital communication, enabling seamless integration with Asset Management Systems (AMS) for predictive maintenance.

• Series 8 Form Factor: Features a unique vertical "plug-in" design that interfaces with a dedicated Input Output Termination Assembly (IOTA).

• Galvanic Isolation: Provides robust protection between field-side signals and the internal I/O Link, preventing ground loops and protecting the C300 controller.

• Smart Filtering: Integrates advanced digital filtering to reject 50/60 Hz mains interference, ensuring stable readings even in electrically noisy industrial environments.

Technical Specifications

Technical FAQs

Does the 8C-PAIHA1 support power for 2-wire transmitters?

Yes. When paired with the correct IOTA (Input Output Termination Assembly), the module provides the necessary loop power to energize standard 2-wire field transmitters.

What is the benefit of the G3 Conformal Coating on this module?

Honeywell Series 8 modules typically come with G3 coating as standard, protecting the internal circuitry against corrosion caused by harsh chemical atmospheres (such as $H_2S$ or $SO_2$ found in refineries).

Can I replace this module while the system is running?

Yes. The 8C-PAIHA1 supports "Hot-Swapping" (Removal and Insertion Under Power), allowing for maintenance without interrupting the control of other modules on the same I/O Link.

Engineering & Installation Guide

• IOTA Compatibility: The 8C-PAIHA1 must be installed on a compatible Series 8 IOTA (e.g., 8C-TAIXA1 or 8C-TAIXB1). Ensure the IOTA is properly grounded to the cabinet's instrument earth bar to maintain the 16-bit signal resolution and HART communication stability.

• Single-Ended Wiring Caution: Because this is a single-ended module, all 16 channels share a common return. It is critical to ensure that field devices do not have conflicting ground potentials, as this can introduce measurement errors or "ghost" signals across multiple channels.

• Heat Dissipation: Series 8 modules are designed for vertical orientation to facilitate natural convection. Do not obstruct the ventilation slots on the IOTA or the module housing. Maintain the manufacturer-recommended spacing between I/O rows to prevent thermal derating in ambient temperatures exceeding 60 Celsius.