HONEYWELL 51304754-176 | Analog Input Card Module PM-AI

Product Overview

The Honeywell 51304754-176 is a High-Level Analog Input (HLAI) card associated with the Honeywell UCN control-system family. The product is also identified with the MC-PAIH03 designation and is described as a PM-AI motherboard / analog input card.

The board is intended for handling analog process input signals within a Honeywell control architecture. It is commonly associated with legacy Honeywell process-control installations where accurate analog input processing is required for plant instrumentation and monitoring.

For replacement work, the complete part number and hardware revision should be checked against the installed card. Honeywell documentation specifically identifies 51304754-176 as an HLAI IOP and notes a Process Manager compatibility issue for hardware revision AJ or greater, so revision matching should not be skipped.

Key Features

Honeywell High-Level Analog Input card
PM-AI motherboard architecture
Model / Part Number: 51304754-176
Associated model reference: MC-PAIH03
Associated assembly number: 51307687-176
PWB reference: 51307686-106
Hardware and firmware revision markings are present on the referenced assembly
Approximate listed weight: 780 g
Intended for Honeywell UCN control-system applications

Technical Datasheet

Parameter	Details
Brand	Honeywell
Product Type	High-Level Analog Input Card
Model / MPN	51304754-176
Model Reference	MC-PAIH03
PM-AI	Motherboard / Analog Input Architecture
Assembly No.	51307687-176
PWB No.	51307686-106
Referenced Hardware Revision	AK on the listed assembly
Referenced Firmware Revision	AC on the listed assembly
Additional PCB	51308360-106
Additional PCB	51308358-106
Additional Assembly	51404092-400 Rev. G
Flammability Rating	94V-0
Listed Weight	Approx. 780 g
System Family	Honeywell UCN
Input Type	High-Level Analog Input

The exact board can carry multiple PCB and assembly numbers. These should be retained when creating an inventory record because they help distinguish a complete HLAI assembly from related boards or subassemblies.

Signal & System Application

The 51304754-176 is associated with Honeywell’s High-Level Analog Input function. Public third-party technical listings describe the MC-PAIH03 as a 16-channel HLAI IOP and associate it with Honeywell UCN, Process Manager, Advanced Process Manager, High Performance Process Manager and Experion PKS environments.

Typical process signals handled by this type of analog input hardware include continuously varying instrumentation measurements such as transmitter outputs. However, exact signal ranges and channel configuration should be verified against the applicable Honeywell system documentation before commissioning rather than assumed from the part number alone.

Typical Applications

The module is suitable for maintenance and lifecycle support of Honeywell control installations where the original HLAI hardware must be retained.

Typical applications include:

Process measurement acquisition
Industrial process-control systems
Analog transmitter interfaces
Plant monitoring and control
Legacy Honeywell UCN installations
Process Manager / related Honeywell control architectures
Critical spare-parts inventory

For an existing installation, the original I/O assignment and system configuration should always be checked before replacing the module.

Installation & Configuration

Before installing a replacement 51304754-176, record the identification information from the existing card.

Recommended procedure:

Confirm the complete part number.
Record the hardware revision and firmware revision.
Photograph PCB labels and connector locations.
Record the existing I/O assignment.
Verify the host system and controller configuration.
Check the module seating and connector condition.
Confirm field wiring before applying power.
Load or verify the appropriate system configuration according to the plant’s approved procedure.
Check analog input values after startup.

Part-number matching alone is not sufficient for legacy Honeywell equipment. In particular, Honeywell issued a notification concerning compatibility between the 51304754-176 HLAI IOP and Process Manager for H/W Rev. AJ or greater.

Maintenance & Inspection

For incoming inspection or spare-parts storage, check:

PCB condition
Connector pins and sockets
Signs of corrosion or moisture
Burn marks or overheated components
Damaged components
PCB mounting points
Part-number labels
Hardware revision
Firmware revision
Assembly and PWB numbers

For long-term storage, use ESD-safe packaging and keep the board in a clean, dry environment.

Before putting a replacement into service, a controlled functional test is recommended where the appropriate Honeywell test environment is available. Record the test result and the board revision as part of the maintenance history.

Replacement Notes

When sourcing this module, search using several identifiers:

51304754-176
MC-PAIH03
51307687-176
51307686-106

The assembly referenced by the supplied product listing is identified as a PM-AI High Level Analog Input card, while other listings may describe 51304754-176 simply as an Analog Input Card. These descriptions refer to the same principal part number but may represent different physical configurations or listing terminology.

Most importantly, verify the hardware revision before replacement. Honeywell’s published notification specifically calls out HLAI IOP P/N 51304754-176 with Process Manager and hardware revision AJ or greater.

Identification Information

For inventory and procurement records, the following identifiers are useful:

51304754-176 — Main Part Number
MC-PAIH03 — Model / Product Reference
51307687-176 — Assembly Number
51307686-106 — PWB Number
51308360-106 — Additional PWB
51308358-106 — Additional PWB
51404092-400 Rev. G — Additional assembly reference

Keeping these identifiers together reduces the risk of ordering a visually similar Honeywell analog input board with a different revision or configuration.