Honeywell CC-PAIH02 HART Analog Input Module | 51405038-375

Honeywell CC-PAIH02 HART Analog Input Module (51405038-375)

The Honeywell CC-PAIH02 is a 16-channel, non-differential analog input module designed for the Experion PKS C300 controller environment. Its primary function in the marine control ecosystem is the digitized conversion of 4-20 mA signals from field instrumentation into high-resolution process data. The module facilitates bi-directional HART communication, allowing the system to extract secondary variables and diagnostic data from smart transmitters without auxiliary wiring. It is frequently interfaced with Honeywell Safety Manager (SM) systems for Emergency Shutdown (ESD) loops and works alongside Schneider Acti9 distribution components within standardized I/O termination assemblies (IOTAs) to manage propulsion monitoring and cargo handling logic.

Operational reliability is maintained through specific hardware hardening against shipboard electrical anomalies. The CC-PAIH02 is designed to maintain signal integrity despite the total harmonic distortion (THD) caused by large engine room variable frequency drives and the inherent fluctuations of an isolated 60 Hz marine grid. To combat the high-humidity and salt-mist environments found in engine control rooms (ECR), the module utilizes conformal coating on its internal circuitry. This prevents the formation of conductive bridges and protects against thermal shock during rapid load changes when the vessel transitions between maneuvering and sea-passage modes.

• Model Number: CC-PAIH02
• Part Number (MPN): 51405038-375  
• Sub-Assembly / Board P/N: 51308359-185 / 51308361-185  
• Module Form Factor: Series C Vertical Plug-in Blade
• System Lineage: Honeywell Experion PKS / C300 Controller Series

Technical Specifications

Key Features

1. 16 High-Level Input Channels: Configurable for standard 4–20 mA current loops, 0–5 V, 1–5 V, and 0.4–2 V DC signals, supporting 2-wire transmitter loop power and 4-wire self-powered field transmitters.
2. Dedicated HART Digital Modem Architecture: Transmits real-time dynamic process variables (PV, SV, TV, QV) and instrument health diagnostics directly into the Experion control database via HART protocol.  
3. Fast Loop Execution: Features an internal 16-bit A/D conversion engine with a deterministic 50 ms scan rate across all 16 channels.  
4. G3 Conformal Coating: Standard ISA-S71.04 Class G3 compliance for mission-critical deployment in harsh marine engine rooms, offshore rigs, and chemical facilities.
5. High Availability & Hot-Swap Support: Enables online insertion and removal under live 24 V DC bus power with automatic parameter restoration when paired with redundant Series C IOTAs.

Marine & Industrial Applications

• Main engine exhaust gas temperature (EGT) monitoring.
• Fuel oil treatment and purifier control systems.
• LNG Carrier Custody Transfer Systems (CTS).
• Boiler water level and feedwater pressure control.
• Integrated Tug/Barge (ITB) automation links.

Compatible Input/Output Termination Assemblies (IOTAs)

• CC-TAIX01 (51308363-175): 16-channel Simplex 6-inch IOTA (standard single module base).
• CC-TAIX11 (51308363-275): 16-channel Redundant 12-inch IOTA (supports dual redundant CC-PAIH02 modules).
• CC-GAIX11 / CC-GAIX21: Universal Marshalling & Galvanic Isolation base assemblies.

Pro-Engineer Tip: Identifying Fretting Corrosion

Fretting corrosion on the backplane connector pins is a failure mode that is often missed in the marine environment. The hull vibrating at low frequencies all the time makes little motions happen between the CC-PAIH02 and the IOTA base. This generates a thin layer of oxide that can cause Bad PV (Process Variable) alarms to go off and on again. These alarms go away when the module is reset. If you get ghost alarms, don’t just restart the module; take it out and look for a dark, powdery residue on the pins. Using a high-quality electrical contact cleaning and a tiny bit of conductive grease can keep this from happening again on a long trip.

System-Wide Solution: Predictive Fleet Management

The real value of the 51405038-375 lies in its role as a data conduit for the entire fleet. By utilizing the HART variables provided by this module, fleet managers can monitor valve travel times or transmitter drift from a shore-side office. This allows for condition-based maintenance—ordering a replacement pressure transmitter before it fails during a critical port approach. Integrating these HART variables into your ship-to-shore satellite link transforms a simple I/O part into a strategic asset for operational uptime.

Frequently Asked Questions

What is the primary difference between Honeywell CC-PAIH01 and CC-PAIH02?

The CC-PAIH02 is the newer revision that delivers improved signal filtration, higher common-mode noise rejection, and upgraded onboard processing. It drops directly into existing CC-TAIX01/11 IOTAs without rewiring or rack reconfiguration.

Can the CC-PAIH02 support 2-wire and 4-wire transmitters on the same module?

Yes. The 16 channels can be individually configured via the Experion PKS Control Builder software to accept 2-wire loop-powered field devices (powered directly via the 24 V DC rail on the IOTA) or 4-wire externally powered transmitters.

What happens to the process loops during an online hot-swap?

In a simplex setup (CC-TAIX01), pulling the module causes an open-wire status across all 16 channels, dropping inputs to fail-safe values. In a redundant setup (CC-TAIX11), removing one module triggers an instantaneous, bumpless transition to the secondary backup module with zero loss of process data or interruption to HART communication loops.

How do I verify if the module is HART-compatible with my field instruments?

The CC-PAIH02 supports standard HART 5, 6, and 7 field devices operating over the 4–20 mA physical layer. It passes all standard universal and common practice commands to device management software such as Honeywell Field Device Manager (FDM).