Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
Processing high-level analog signals within the legacy Honeywell TDC 3000 and TPS Process Manager control architectures, the Honeywell 51304754-100 (module designation MU-PAIH03) serves as a dedicated High Level Analog Input (HLAI) processor. This card executes high-density signal conditioning, analog-to-digital conversion, and secure bus communication for critical process loops. Designed for environments with controlled atmospheric parameters, this specific assembly is a non-conformally coated hardware version built to strict OEM technical tolerances.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Honeywell |
| Part Number (SKU) | 51304754-100 |
| Model Number | MU-PAIH03 |
| Module Type | High Level Analog Input (HLAI) Processor |
| Input Channels | 16 Channels |
| Signal Input Range | 1 to 5 VDC (or 4 to 20 mA via 250 Ohm termination resistors at the FTA) |
| Conformal Coating | No (Non-coated) |
| Compliance | CE compliant |
| Operating Temperature | 0 to 60 degC |
| Shipping Weight (Calculated) | 3.0 kg (6.61 lbs) |
| Interface Component | Description / Function |
|---|---|
| I/O Link Connector | Interfaces directly with the I/O Link cable to feed data to the High Level Analog Input FTA. |
| Backplane Connector | Connects to the card file backplane for 24 VDC redundant power and communication. |
Alternative Models & Compatibility: The 51304754-100 (MU-PAIH03) is a non-conformally coated module. If your system is deployed in environments containing corrosive elements like hydrogen sulfide (H2S), chlorine, or high relative humidity, you must replace it with the conformally coated equivalent (MC-PAIH03, part number 51304754-150 / 51304754-200) to avoid accelerated trace corrosion.
Application Pitfalls & Engineering Notes: Because this processor relies on passive voltage measurement, it converts 4 to 20 mA transmitter loops into a 1 to 5 VDC signal across precision 250-Ohm shunt resistors located directly on the Field Termination Assembly (FTA). If an entire card's channel group exhibits offset readings, inspect the FTA's common ground reference and verify that the resistor network has not drifted.
Commissioning & Wiring Tips: Ensure that the multi-conductor I/O link cable running from the card file backplane to the FTA is fully secured and shielded. Loose connector screws are a common source of intermittent channel errors and open-loop sensor failures in highly vibrant control room panels.
Before inserting or extracting the HLAI module, ensure the I/O slot power is properly handled. Live insertion (hot-swapping) must only be performed under strictly controlled field maintenance protocols. Ground yourself using an ESD wrist strap prior to touching the PCB components.
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Returns & Warranty

Processing high-level analog signals within the legacy Honeywell TDC 3000 and TPS Process Manager control architectures, the Honeywell 51304754-100 (module designation MU-PAIH03) serves as a dedicated High Level Analog Input (HLAI) processor. This card executes high-density signal conditioning, analog-to-digital conversion, and secure bus communication for critical process loops. Designed for environments with controlled atmospheric parameters, this specific assembly is a non-conformally coated hardware version built to strict OEM technical tolerances.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Honeywell |
| Part Number (SKU) | 51304754-100 |
| Model Number | MU-PAIH03 |
| Module Type | High Level Analog Input (HLAI) Processor |
| Input Channels | 16 Channels |
| Signal Input Range | 1 to 5 VDC (or 4 to 20 mA via 250 Ohm termination resistors at the FTA) |
| Conformal Coating | No (Non-coated) |
| Compliance | CE compliant |
| Operating Temperature | 0 to 60 degC |
| Shipping Weight (Calculated) | 3.0 kg (6.61 lbs) |
| Interface Component | Description / Function |
|---|---|
| I/O Link Connector | Interfaces directly with the I/O Link cable to feed data to the High Level Analog Input FTA. |
| Backplane Connector | Connects to the card file backplane for 24 VDC redundant power and communication. |
Alternative Models & Compatibility: The 51304754-100 (MU-PAIH03) is a non-conformally coated module. If your system is deployed in environments containing corrosive elements like hydrogen sulfide (H2S), chlorine, or high relative humidity, you must replace it with the conformally coated equivalent (MC-PAIH03, part number 51304754-150 / 51304754-200) to avoid accelerated trace corrosion.
Application Pitfalls & Engineering Notes: Because this processor relies on passive voltage measurement, it converts 4 to 20 mA transmitter loops into a 1 to 5 VDC signal across precision 250-Ohm shunt resistors located directly on the Field Termination Assembly (FTA). If an entire card's channel group exhibits offset readings, inspect the FTA's common ground reference and verify that the resistor network has not drifted.
Commissioning & Wiring Tips: Ensure that the multi-conductor I/O link cable running from the card file backplane to the FTA is fully secured and shielded. Loose connector screws are a common source of intermittent channel errors and open-loop sensor failures in highly vibrant control room panels.
Before inserting or extracting the HLAI module, ensure the I/O slot power is properly handled. Live insertion (hot-swapping) must only be performed under strictly controlled field maintenance protocols. Ground yourself using an ESD wrist strap prior to touching the PCB components.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|