Description
Honeywell MC-GOAX02 51304638-175 | 8-Channel AO FTA
Product Introduction
The Honeywell MC-GOAX02 51304638-175 is a galvanically isolated analog-output Field Termination Assembly used to interface process-control analog outputs with field wiring. Available technical cross-references identify the assembly as an 8-channel, nonredundant 4–20 mA FTA with galvanic isolation between the relevant signal circuits.
That distinction matters during procurement. The MC-GOAX02 is an FTA, rather than an independent DCS controller or generic analog-output module. It belongs to the Honeywell I/O signal-interface architecture, so the correct mating I/O processor, cable assembly, mounting arrangement, power distribution, and field wiring must be established before treating it as a replacement.
The 51304638-175 suffix should also be retained in procurement records. Supplier catalogs associate the MC-GOAX02 with both 51304638-150 and 51304638-175, so purchasing only by the shorter MC-GOAX02 model designation can create unnecessary ambiguity.
MC-GOAX02 51304638-175
Key Technical Specifications
- Model: MC-GOAX02
- Honeywell Part Number: 51304638-175
- Product Type: Analog Output Field Termination Assembly
- Configuration: Galvanically isolated, nonredundant
- Number of Channels: 8
- Output Type: 4–20 mA DC
- Field Interface: Analog current-loop outputs
- Terminal Type: Compression terminals
- Isolation: Galvanic signal isolation
- Associated Part Number: 51304638-150
- System Association: Honeywell Process Manager / TDC 3000 / TPS-related installations
- Physical Size: Size B; approximately 307 mm / 12 in according to available supplier data
- Coating: MC-series coated version is identified in supplier cross-references
The available sources do not provide a sufficiently reliable OEM datasheet for every electrical parameter. I would therefore avoid publishing an exact loop-resistance limit, power-consumption figure, accuracy specification, or operating-temperature range as an OEM-confirmed specification without the applicable Honeywell drawing or manual.
Global Sourcing & Live-Test SOP
For an older Honeywell FTA, the main procurement risk is not whether the assembly looks clean. The important question is whether the termination hardware, isolation circuits, connectors, and associated I/O architecture match the installed system.
Recommended receiving procedure:
- Part-number verification
Confirm and 51304638-175 from the physical identification label. - Revision and traceability capture
Record serial number, revision markings, manufacturing information, coating identification, and any associated assembly numbers. - Physical inspection
Examine the PCB/assembly, terminal blocks, connectors, mounting points, wiring interfaces, and enclosure for corrosion, contamination, cracked components, or previous repair work. - Terminal verification
Compare the terminal arrangement against the machine’s approved Honeywell wiring documentation. Do not assume that similarly labeled FTA assemblies have identical terminal assignments. - I/O architecture check
Confirm the associated Honeywell I/O processor, I/O cable, mounting channel, power distribution assembly, and field device arrangement. - Controlled signal test
If functional testing is included by the supplier, use an approved Honeywell-compatible test configuration to exercise representative analog-output channels. Verify that the measured current corresponds to the commanded output. - Isolation verification
Where the test facility is equipped for it, verify the applicable galvanic isolation characteristics using an appropriate test procedure. Do not improvise a high-voltage isolation test on an unknown assembly. - Documentation
Record the exact test conditions, channels tested, measured values, and channels not tested. - ESD-safe packaging
Protect the assembly against electrostatic discharge and mechanical impact during international shipment.
Procurement disclosure: This is a recommended receiving and qualification SOP. It does not mean the specific MC- 51304638-175 unit has been tested.
Field Engineer’s Pitfall Guide
Warning 1 — Do not confuse the FTA with the actual I/O processor.
The MC- is a field termination/interface assembly. It must be evaluated as part of the complete Honeywell I/O architecture. Replacing a processor with an FTA, or selecting an FTA without checking its mating I/O hardware, will not restore a failed control loop.
Warning 2 — Verify the complete part number, not just “.”
The MC- family is associated with multiple 51304638 suffixes, including 51304638-150 and 51304638-175. Keep the complete suffix in the purchase order and compare it with the installed assembly.
Warning 3 — Do not trust conflicting marketplace specifications.
Several reseller pages describe the 51304638-175 inconsistently. One source identifies it as an 8-channel 4–20 mA FTA, while another claims two channels and configurable 0–10 V output. Those descriptions cannot all represent the same hardware configuration. For engineering release, use the installed nameplate and Honeywell system documentation rather than an uncontrolled reseller specification.
Frequently Asked Questions
Q1: What is the Honeywell MC- 51304638-175?
It is a Honeywell galvanically isolated analog-output Field Termination Assembly associated with process-control I/O systems.
Q2: How many channels does the MC- provide?
Available cross-references identify the 51304638-175 as an 8-channel 4–20 mA analog-output FTA.
Q3: Is the MC- redundant?
The available product references identify this configuration as nonredundant.
Q4: What is the purpose of galvanic isolation?
It separates the relevant signal circuits electrically, helping prevent unwanted ground-potential differences and fault currents from propagating directly between connected circuits.
Q5: Is the MC- a standalone analog-output module?
No. Treat it as a field termination/interface assembly within the Honeywell I/O architecture. Confirm the associated I/O processor, cables, mounting hardware, power distribution, and field wiring before replacement.
Q6: Are 51304638-150 and 51304638-175 interchangeable?
Do not assume interchangeability. Both numbers are associated with the MC- family in supplier documentation, but the complete suffix and applicable system drawing should be verified before substitution.
Q7: Can the MC- be hot-swapped?
Do not assume it can. Follow the Honeywell system maintenance procedure for the specific I/O architecture and determine whether the associated field wiring and I/O assembly must be de-energized before removal.
Q8: What should be checked when buying a used MC-?
Verify the complete MC- / 51304638-175 identification, terminal condition, connector condition, coating/board condition, revision markings, and supplier’s actual functional-test scope. For a used FTA, a visual inspection is not equivalent to a channel-by-channel signal test.
