Description
Product Overview
Honeywell SC-TCMX01 51307198-175 is a base-unit assembly used within the Honeywell RTU2020 modular remote terminal unit architecture. Its job is primarily structural and electrical: it provides the mounting and interconnection foundation for the RTU’s controller, communication, and I/O components. In an installed RTU2020 system, the base unit is therefore part of the system infrastructure rather than the processor that executes the control application.
The Honeywell SC-TCMX01 is associated with the RTU2020 platform used for remote field automation, including upstream oil and gas applications. Available product documentation describes the RTU2020 as a preconfigured RTU solution intended to simplify deployment and remote monitoring of assets such as wellheads and pipeline equipment. The 51307198-175 identification is particularly important because several online databases incorrectly classify this same number as a controller, digital-output module, or high-precision process-control module. Those descriptions conflict with the more consistent base-unit identification.
For maintenance and procurement, Honeywell SC-TCMX01 51307198-175 should therefore be treated as an RTU2020 base/chassis component. The controller, I/O modules, communication modules, and power supply installed on the base should be identified separately. Do not substitute a visually similar Honeywell RTU assembly without confirming mechanical mounting, electrical interconnection, module compatibility, and the exact RTU2020 configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | SC-TCMX01 |
| Part Number | 51307198-175 |
| Product Type | Base Unit |
| System Platform | Honeywell |
| Primary Function | Module mounting and system interconnection |
| Associated Hardware | Controller, communication and I/O modules |
| Backplane Function | Power and signal distribution between installed modules |
| Typical Controller | SC-UCMX01 |
| Typical Application | Remote field RTU systems |
| Installation | RTU cabinet / field enclosure |
| Reported Dimensions | Approx. 263 × 120 × 58 mm* |
| Reported Weight | Approx. 1.5 kg* |
*Dimensions and weight come from secondary product data and should be verified against the actual hardware revision before engineering a replacement enclosure.
I would not publish the commonly repeated claims of “16 DI / 8 AI / 8 DO / 4 AO” for SC-TCMX01 as specifications of the base unit itself. Those figures appear on a secondary listing that simultaneously identifies the part as a ControlEdge RTU and a gas-detection product, making the data internally inconsistent.
Main Features and Advantages
System Foundation
The SC-TCMX01 provides the physical foundation for the modular assembly. Rather than containing the principal control logic, it allows the appropriate controller and I/O hardware to be installed as a coordinated RTU system.
Module Interconnection
The base unit provides the electrical interconnection required by the modular architecture. This reduces point-to-point wiring between individual modules and makes replacement of a failed controller or I/O component more straightforward.
SC-TCMX01 51307198-175
Field RTU Applications
The platform is intended for remote asset monitoring and control. Honeywell’s documentation describes its use in upstream oil and gas applications, including wellhead and pipeline assets.
Maintenance-Friendly Architecture
For a field technician, the base-unit concept has an important practical advantage: the controller and I/O hardware can be treated as separate service items. A failed module can potentially be replaced without redesigning the entire remote terminal cabinet.
Compatibility With SC-UCMX01
Available documentation identifies SC-UCMX01 51307195-175 as the controller associated with the base. The exact controller and I/O combination should nevertheless be confirmed from the installed cabinet documentation.
Application Scenarios
Remote Oil & Gas Monitoring
systems are designed for remote monitoring and control of distributed field assets such as wellheads and pipelines.
Remote Terminal Cabinets
The SC- can form the mechanical/electrical base of a modular RTU cabinet containing controller, communication, power, and I/O hardware.
Distributed Process Monitoring
Remote field measurements can be collected by the installed I/O modules and transferred through the appropriate controller and communications architecture.
Legacy RTU Maintenance
Where an existing installation remains operational, keeping the correct base unit as a spare can be useful if physical damage, connector problems, or backplane faults occur.
Related Components
- SC-UCMX01 51307195-175 — controller associated with the base-unit architecture.
- SC-UCMX02 — Related Honeywell RTU module appearing in the same product family.
- — Provide the actual field signal interfaces.
- communication modules — Provide external network or serial communications.
- Honeywell power components — Supply the required power to the modular assembly.
Engineer’s Guide: Field Pitfalls
⚠️ Do Not Treat SC- as the CPU
This is the most important identification point.
SC- = Base Unit
SC-UCMX01 = Controller
A number of secondary databases incorrectly describe SC- as a controller or digital-output module.
⚠️ Verify the Complete Part Number
Use:
SC- — 51307198-175
Do not order simply by “Honeywell base.” The exact part number should be matched against the installed assembly.
⚠️ Inspect the Backplane and Connectors
If an RTU has intermittent communication, module dropouts, or unexplained I/O failures, inspect the base unit and module connectors before replacing the controller.
Check for:
- Bent contacts
- Corrosion
- Loose terminals
- Damaged backplane connections
- Mechanical cracks
- Evidence of overheating
- Poor module seating
⚠️ Confirm Mechanical Compatibility
The base unit determines how the RTU modules are physically arranged. Even if a replacement controller has compatible functionality, an incorrect base can prevent correct installation or electrical interconnection.
⚠️ Do Not Trust Generic Specification Tables
The web contains conflicting descriptions for 51307198-175, including “temperature controller,” “digital output module,” “remote terminal unit,” and “base unit.”
For procurement, the physical part marking and Honeywell system documentation should take precedence over generic reseller specifications.
Frequently Asked Questions
What is Honeywell SC- 51307198-175?
It is a base unit for the Honeywell modular remote terminal unit platform.
Is SC- a controller?
No. The available documentation identifies SC-UCMX01 as the controller, while SC- is the base unit.
What does the base unit do?
It provides the mechanical mounting and electrical interconnection for the controller and associated communication/I/O modules.
Is 51307198-175 an I/O module?
The more credible product-specific identification is , not an I/O module. Several secondary databases misclassify it, so the complete system configuration should be checked before ordering.
What should I request when purchasing a replacement?
For a used or surplus SC- 51307198-175, request:
- Clear photographs of the complete base assembly.
- Part-number/nameplate confirmation.
- Connector and backplane photographs.
- Mechanical inspection.
- Continuity/interconnection test where applicable.
- Confirmation of compatible modules.
- Confirmation of the installed SC-/controller configuration.
- Test report.
- Hardware revision information.
- Warranty terms.
Recommended procurement description:
Honeywell SC-, P/N 51307198-175, Base Unit — modular RTU mounting and electrical interconnection assembly; verify controller, I/O configuration, mechanical dimensions, and hardware revision before replacement.
