Description

Honeywell SC-UCMX02 51307198-276 | Genuine RTU Controller for Remote Process Monitoring

Product Core Brief

Model: SC-UCMX02 (51307198-276)
Brand: Honeywell
Series: ControlEdge RTU Platform
Core Function: Non-redundant RTU controller executing remote field process control and data acquisition
Type: RTU Main Controller Module
Key Specs: 256 MB DRAM / 256 MB Flash | Onboard mixed I/O | Multi-port Ethernet & Serial Interfaces
Condition: New Surplus, non-refurbished

⚠️ Successor model of SC-UCMX01; firmware cross-version limitations apply

Key Technical Specifications

Parameter	Details
Full Part Number	SC-UCMX02, Part Code: 51307198-276
Platform	Honeywell ControlEdge RTU
Processor	Dual-core ARM Cortex-A9, 667 MHz
Memory	256 MB DRAM, 256 MB Flash, 4 Mbit non-volatile memory
Power Supply	24 V DC (18–30 V DC), Max 1.20 A @ 30 V DC
Onboard I/O	Integrated mixed analog & digital I/O terminals
Communication Interfaces	4 × Ethernet, 2 × RS485, 2 × RS232, SD card slot
Supported Software	ControlEdge Builder R160 and newer
Operating Temperature	-20 °C ~ +60 °C
Storage Temperature	-40 °C ~ +70 °C
Humidity Range	5%–95% non-condensing
Expansion Capacity	Supports up to 30 external IOM expansion modules
Pre-Shipment Test	Complete live bench functional verification

Honeywell SC-UCMX02 51307198-276

Product Introduction

Honeywell SC-UCMX02 (51307198-276) is a non-redundant main controller for the ControlEdge RTU system. Designed for remote field sites, it performs continuous process control, data logging, and communication with upper-level DCS and SCADA hosts. The unit integrates onboard mixed I/O and supports extended I/O racks for flexible field signal connection.

This controller is the upgraded hardware variant succeeding SC-UCMX01. It runs newer firmware branches starting from R160, and cannot be downgraded to older OS versions used by SC-UCMX01. Multiple built-in communication ports support Modbus TCP, Modbus RTU and other standard industrial protocols. It is widely deployed as maintenance spare for remote pipeline, wellsite and distributed energy assets.

Application Scenarios & Pain Points

Remote unmanned sites lack on-site maintenance teams. If the RTU main controller fails, operators lose real-time visibility and automatic control of field equipment. OEM lead times often extend to 8–12 weeks, and extended outages trigger production losses and monitoring blind spots.

Typical application scenarios:

Oil & Gas Gathering Pipelines – Remote flow & pressure RTU

Controls valve interlocks and transmits real-time pipeline data back to central SCADA; most sites operate unattended 24/7.
Onshore Oil & Gas Well Sites – Production monitoring RTU

Tracks wellhead pressure, temperature and flow rates; fast spare replacement minimizes remote site travel costs.
Water & Wastewater Facilities – Distributed pumping station control

Covers geographically scattered pump stations and remote reservoir monitoring.
Renewable Energy Plants – Solar & Wind auxiliary field control

Executes local interlock logic and data forwarding for distributed power assets.

Case Reference

A natural gas pipeline operator suffered RTU communication failure on a remote valve station last spring. Diagnostics confirmed hardware failure on SC-UCMX02. Honeywell official lead time was 11 weeks. Without working RTU, the control center could not remotely operate safety shutdown valves.

The procurement team purchased bench-tested SC-UCMX02 spare unit from our stock. Before removal, technicians recorded the exact firmware version and all network configuration parameters. After hardware replacement, project engineers downloaded the control program and completed full communication testing within one working day. Remote monitoring and valve control were fully restored.

Honeywell SC-UCMX02 51307198-276

Compatibility & Replacement Matrix

SC-UCMX02 (51307198-276) → SC-UCMX02 : Direct like-for-like swap; match firmware version before installation

SC-UCMX02 (51307198-276) → SC-UCMX01 : Hardware pin compatible; firmware cannot be cross-loaded. SC-UCMX02 cannot run R150 or older firmware; SC-UCMX01 cannot upgrade to R160+

SC-UCMX02 (51307198-276) → SC-ZRTU01 : Hardware upgrade variant; requires full system reconfiguration, not plug-and-play

SC-UCMX02 (51307198-276) → Experion C300 Controller : Not compatible, different system architecture

Quality Control SOP

Incoming Inspection

Serial number verification, complete visual inspection. Check PCB for corrosion, solder joint degradation and any signs of prior repair.
Live Bench Functional Test

Test bench built with ControlEdge RTU simulation rack. Verify power-on sequence, Ethernet & serial communication, onboard I/O response. Continuous 24-hour energized soak test.
Electrical Performance Test

500 V DC insulation resistance test, continuity check for all terminal paths.
Documentation Retention

Record serial number, hardware revision and full test logs; test photos can be provided upon customer request.
Final Packing

Sealed inside ESD anti-static bag, protected by bubble cushion, attached QC Pass inspection label.

Field Installation Pitfall Guide

❗ Critical Firmware Version Restriction

SC-UCMX02 only supports ControlEdge Builder R160 and later firmware. It cannot load R150 or older operating systems used by SC-UCMX01. Do not order blindly without confirming site software revision. I have witnessed a site replacement delayed 5 days because engineers overlooked this limitation.

❗ Network Configuration Backup

All IP addresses, serial port baud rates and slave table settings are stored locally on the controller. Export configuration files before removing the faulty unit. Manual retyping of parameters easily causes communication dropouts.

❗ ESD Damage Risk

Internal memory and communication chips are static sensitive. Wear anti-static wristbands during handling, especially in dry winter environments.

❗ SD Card Program Storage

The SD card slot supports offline program backup. Verify the SD card format and file structure after replacement; corrupted SD cards lead to program loading failures after power cycling.

❗ Power Load Budget

When expanding multiple IOM modules, calculate total power consumption. The maximum input current limit is 1.20 A; overloading causes random controller resets.