Description
Product Introduction
The Honeywell 8C-PAON01 (frequently stamped with PCBA part number 51454357-175) is a high-density 16-channel Analog Output (AO) module belonging to Honeywell’s flagship Experion PKS Series C I/O family. Engineered for continuous process automation, this module converts digital control commands from the C300 execution engine into accurate 4–20 mA current signals while maintaining bidirectional HART communications with field actuators.
Featuring the signature Series C ergonomic wedge design, the 8C-PAON01 snaps directly onto a matching Input/Output Termination Assembly (IOTA). Replacing a failing 8C-PAON01 card resolves current loop freeze faults, missing HART device telemetry, and output drift on critical control loops.
Key Technical Specifications
| Parameter | Value |
| Model Number | 8C-PAON01 |
| Assembly Part Number | 51454357-175 / 51405043-175 |
| Manufacturer | Honeywell Process Solutions |
| System Platform | Experion PKS (C300 Controller / Series C Architecture) |
| Module Type | Analog Output (AO) with HART Protocol |
| Number of Channels | 16 Channels |
| Output Range | 4–20 mA DC (Standard Industrial Current Loop) |
| Coating Rating | Conformal Coated (ISA S71.04 G3 Airborne Contaminant Protection) |
Application Scenarios & The “Trench” Experience
During a routine turnaround at a chemical refinery, operators noticed that a primary steam header control valve failed to respond to setpoint adjustments from the DCS console. The Experion system logged an open-loop fault on channel 4 of the local Series C analog output block.
- Refinery Control Loops – Valve Positioners – Controls pneumatic control valve positioners with real-time HART feedback.
- Power Generation Facilities – Speed & Feed Control – Regulates VFD speed references for boiler feed pumps and draft fans.
- Water & Wastewater Treatment – Dosing Systems – Drives chemical dosing pump speed controllers via 4–20 mA loops.
Instrument technicians traced the fault to a failed internal D/A converter stage on the output card. Technicians placed the loop into manual mode, unlatched the module retaining screw, and hot-swapped the unit with a bench-tested Honeywell 8C-PAON01 replacement. The C300 controller automatically loaded the channel configuration, instantly restoring smooth valve modulation.
Transparency SOP: Quality Assurance & Testing
Every 8C-PAON01 module undergoes comprehensive testing before being placed into stock:
- Inbound Mechanical & Pin Inspection: Checking edge connector fingers, hold-down latch screws, and housing integrity.
- Backplane & Power Rail Test: Mounting the module on an IOTA test rig to verify internal voltage conversion and LED boot sequences.
- 16-Channel 4–20 mA Output Calibration Test: Driving each output channel across 0%, 25%, 50%, 75%, and 100% span into precision load banks to verify current accuracy.
- HART Protocol Pass-Through Test: Communicating with downstream smart positioners to ensure full bidirectional HART message passthrough without signal noise or attenuation.
- ESD Protective Packaging: Sealing the card in static-dissipative ESD bags with custom protective foam padding for transport.
8C-PAON01
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Distinguish 8C (Coated) vs. 8U (Uncoated) Models: The “8C” prefix designates factory conformal coating for harsh environments (G3 rated). If replacing an 8C-PAON01 in a corrosive plant area (such as sulfur or chlorine processing), do not substitute an uncoated 8U module as environmental corrosion will cause premature trace failure.
- ❗ Verify Non-Redundant vs. Redundant IOTA Wiring: The 8C-PAON01 is a single (non-redundant) module. If your site requires redundant AO module pairs, you must use the redundant equivalent (8C-PAOH01) on a redundant IOTA board.
- ⚠️ Check Field Loop Power Sources: Ensure whether the field loops are powered internally by the IOTA or powered externally by field devices. Miswiring power source jumpers on the IOTA can blow internal channel protection fuses on the 8C-PAON01 card.
Frequently Asked Questions (FAQ for Conversion)
Q: Is the Honeywell 8C-PAON01 hot-swappable (RIUP)?
A: Yes. Experion Series C modules support Removal and Insertion Under Power (RIUP) without affecting other I/O modules on the same link.
Q: What is the difference between part numbers 8C-PAON01 and 51454357-175?
A: 8C-PAON01 is the system ordering model number, while 51454357-175 is the physical PCBA assembly part number printed on the module body.
Q: Does replacing this card require downloading code from Control Builder?
A: No. When inserted into the designated IOTA slot, the C300 controller recognizes the module and automatically pushes the existing channel configuration down to the card.
Q: Does this module support HART field devices?
A: Yes. The 8C-PAON01 supports full HART digital communication superimposed over the 4–20 mA current loops.
Q: What warranty is provided with this surplus Honeywell module?
A: Every tested 8C-PAON01 unit comes backed by our full 12-month replacement warranty.
Start Chat
