Description
Honeywell 51303932-476 | MC-TSIM12 Serial Interface FTA | Modbus
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | MC-TSIM12 |
| Part Number | 51303932-476 |
| Alternate P/N | 51303932476 |
| Product Type | Serial Interface FTA |
| FTA Type | SI – Modbus |
| Communication Protocol | Modbus |
| Electrical Interface | EIA-232 |
| Number of Channels | 1 |
| Terminal Type | DB25 or compression |
| Size | Size A |
| Approx. Size A Dimension | 6 in. / 152 mm |
| Approx. Dimensions | 152 × 120 × 82 mm |
| Approx. Weight | 0.32 kg |
| System Family | Honeywell TDC 3000 / UCN |
The one-channel SI-Modbus identification, EIA-232 interface, DB25/compression termination options, Size A classification, approximate 152 mm size, and 0.32 kg weight are consistently reported across multiple Honeywell DCS component records.
Specification Caution
I would not publish the frequently repeated claims of 12 VDC input, 9,600 bps, eight channels, IP65, or 220 VAC input as confirmed specifications for 51303932-476. Current listings conflict substantially on these values, while the stronger product records identify the part specifically as a one-channel SI-Modbus EIA-232 FTA.
Product Introduction
Honeywell MC-TSIM12 51303932-476
The Honeywell 51303932-476, also designated , is a Serial Interface Field Termination Assembly used with Honeywell’s Universal Control Network architecture. Its documented function is to provide a one-channel Modbus serial interface, with the field connection specified as EIA-232.
This is an interface/termination component rather than a conventional PLC I/O card. For maintenance work, the exact FTA type, serial electrical standard, termination arrangement, and associated TDC 3000/UCN hardware should be checked before approving a replacement.
51303932-476
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
The 51303932-476 is most relevant when a legacy Honeywell DCS needs to exchange serial Modbus data with an external instrument, controller, meter, or packaged-system device.
Typical Applications
- TDC 3000 serial device integration — Providing a Modbus interface within the Honeywell DCS environment.
- UCN-based DCS maintenance — Replacement of an existing MC- FTA.
- Packaged equipment communication — Connecting compatible serial Modbus equipment to the control system.
- Legacy communication infrastructure — Maintaining an existing serial interface rather than redesigning the complete communications architecture.
Technical Pitfalls to Avoid
- Do not confuse the FTA with the complete Modbus communication subsystem.
The 51303932-476 is identified as the Serial Interface FTA. The associated controller/interface hardware and UCN architecture still need to be checked. - Verify EIA-232 versus other serial standards.
Some generic listings describe this part simply as a “Modbus interface.” The stronger identification specifies , which matters when checking cable length, grounding, signal wiring, and the connected device. - Check the terminal configuration.
Records identify either DB25 or compression-type termination. Do not assume the field wiring arrangement from the part number alone. - Do not use generic channel-count specifications.
The documented FTA is one channel. Claims describing eight inputs/eight outputs appear to be copied from unrelated interface products and should not be used for engineering approval. - Verify the exact revision.
The part number may appear as 51303932-476, 51303932476, or MC- in inventory records. The complete nameplate and revision should be checked before substitution.
Related Products
- Honeywell MC- — Alternate model designation for 51303932-476.
- Honeywell 51303932-426 — Non-conformal-coated FTA variant identified separately from the -476 version.
- Honeywell 51303932-403 / MU-TSIA12 — Related Honeywell serial interface hardware in the TDC/UCN ecosystem.
- Honeywell SI-Modbus FTA — Functional category covering the 51303932-476 interface.
- Honeywell UCN — Universal Control Network architecture associated with this FTA.
- Honeywell TDC 3000 — Legacy DCS platform commonly associated with the UCN serial-interface hardware.
- Honeywell Experion — Later Honeywell control-system ecosystem; compatibility should not be assumed solely because a listing mentions both systems.
Procurement Check
For a 51303932-476 replacement, verify:
51303932-476 / MC- + SI-Modbus designation + + one channel + terminal type + installed TDC/UCN architecture.
The safest engineering identification is Honeywell MC-, 51303932-476, Serial Interface Modbus FTA. I would reject listings that describe it as an eight-channel generic I/O module or assign unverified power/input specifications to it.
