Description
The GE 369B1860G0028, also designated MPU51, is a Nexus Communication Control Module used in the GE Nexus / OnCore control system. GE Vernova’s current public documentation explicitly identifies MPU51 (369B1860G0028) as a Nexus Controller, while the Nexus system manual identifies the same catalog number as the MPU51 Communication Control Module.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | GE / GE Vernova |
| Part Number | 369B1860G0028 |
| Module Designation | MPU51 |
| Product Type | Nexus Communication Control Module |
| System | GE Nexus / OnCore Control System |
| Processor | Intel Atom N450, 1.66 GHz |
| L2 Cache | 512 KB |
| RAM | 1 GB DDR2 667/800 MHz |
| Flash Memory | 2 GB |
| Operating System | QNX real-time operating system |
| Ethernet Interfaces | 5 × RJ-45 Ethernet |
| Ethernet Speed | 10/100 Mbps |
| RS-485 Interfaces | 8 isolated RS-485 serial ports |
| Serial Baud Rates | 9600, 14400, 19200, 38400 bps |
| Power Supply | Dual redundant 24 VDC inputs, ±10% |
| Power Consumption | Maximum 15 W |
| Typical Function | Nexus communication control, system data exchange, supervisory communications |
| Catalog Number | 369B1860G0028 |
| Alternate Designation | MPU51 |
| Lifecycle | Legacy Nexus platform component |
| OEM Documentation | GEK-118585 Nexus System Manual |
The processor, memory, interfaces, and power specifications above come from the GEK-118585 Nexus system documentation; GE’s public certification documents independently identify 369B1860G0028 as MPU51.
GE 369B1860G0028
Product Overview
The 369B1860G0028 is not a GE Multilin 369 motor relay. Despite the numerical similarity to GE’s 369 relay product family, 369B1860G0028 belongs to the Nexus control-system hardware family. GE documentation identifies it specifically as the Communication Control Module.
The provides the communication-processing layer for a Nexus control system. Its hardware combines an embedded Intel Atom processor with multiple Ethernet and isolated RS-485 interfaces. The Nexus architecture uses these interfaces to exchange information with other control-system components and connected devices.
Communication Interfaces
The provides:
5 × RJ-45 Ethernet ports
The documentation specifies 10/100 Mbps Ethernet. Two of these ports are designated for the UDH interface in the Nexus system architecture.
8 × isolated RS-485 ports
These serial interfaces support Modbus communication at 9600, 14400, 19200, and 38400 bps. The documented Modbus capacity varies with baud rate, reaching up to 1,536 analog points and 12,288 digital points at 38,400 bps.
Power and Hardware Architecture
The uses dual redundant 24 VDC power inputs with ±10% tolerance, supporting the redundant-power architecture of the Nexus platform. Maximum module power consumption is specified as 15 W.
The module uses an Intel Atom N450 at 1.66 GHz, with 1 GB DDR2 RAM and 2 GB flash storage. The operating system specified by the Nexus documentation is QNX, reflecting its role as an embedded real-time control-system communication module rather than a conventional desktop industrial PC.
System Application
The 369B1860G0028 is used within the Nexus control-system architecture. The Nexus manual lists the module alongside other system components such as:
- MPU50 / 369B1860G0026 — Nexus controller
- / 369B1860G0028 — Nexus communication control module
- MPU52 / 369B1860G0029 — Nexus controller
- MVP-series modules — valve-position and digital-output functions
- MSP-series modules — speed measurement and protection functions
These devices form part of the broader Nexus control-system hardware family.
Replacement Considerations
For replacement procurement, 369B1860G0028 should be matched by both the GE catalog number and the designation. The module’s communication interfaces are closely tied to the Nexus architecture, so a different MPU or later controller should not be assumed to be a plug-in substitute without checking the specific Nexus system revision and application software.
Particular attention should be given to:
| Replacement Check | Why It Matters |
|---|---|
| 369B1860G0028 / | Confirms the correct controller family |
| Nexus system revision | Hardware and software dependencies can vary |
| 24 VDC redundant supply | Required by the documented module architecture |
| Ethernet port allocation | UDH and system network connections use defined interfaces |
| RS-485 connections | Eight isolated serial interfaces may have system-specific assignments |
| QNX / Nexus software environment | Controller operation depends on the corresponding system software |
| Configuration backup | Needed when replacing a failed communication controller |
| Serial number / hardware revision | Useful when matching a legacy installed unit |
Lifecycle and Obsolescence
The 369B1860G0028 / is associated with the legacy Nexus control platform. GE’s current public certification documentation continues to identify the catalog number, while the underlying Nexus documentation shows the architecture and specifications.
Because this is a legacy control-system component, procurement teams should verify the exact hardware revision and actual stock condition rather than relying solely on generic descriptions such as “GE controller” or “Mark VI controller.” Some secondary-market listings incorrectly associate 369B1860G0028 with Mark VIe hardware; the GE/Baker Hughes Nexus documentation instead identifies it as , Nexus Communication Control Module.
FAQ
What is GE 369B1860G0028?
It is the GE Nexus Communication Control Module.
Is 369B1860G0028 a GE Multilin 369 relay?
No. The similar numbering can be misleading. 369B1860G0028 is a Nexus communication control module, not a Multilin 369 motor management relay.
What processor does the use?
The Nexus documentation specifies an Intel Atom N450, 1.66 GHz, with 512 KB L2 cache.
How much memory does it have?
The documented configuration includes 1 GB DDR2 RAM and 2 GB flash memory.
What communication ports are available?
The has five 10/100 Mbps RJ-45 Ethernet ports and eight isolated RS-485 serial ports.
What is the power requirement?
The module uses dual redundant 24 VDC inputs, ±10%, with maximum power consumption of 15 W.
What is the correct product description for purchasing?
A technically precise description is: GE 369B1860G0028 () Nexus Communication Control Module.
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