MPU50 GE Nexus iDPU Controller 15V 3A Power Cord

GE MPU50 Nexus Series iDPU Controller

Product Introduction

The GE MPU50 serves as the central processing engine for the Nexus series automation platform. This intelligent Data Processing Unit (iDPU) combines a 1.66GHz 64-bit Intel embedded processor with 1GB of DDR2 memory and 2GB of onboard non-volatile flash storage. The MPU50 runs the QNX real-time multitasking operating system, delivering deterministic performance for critical control applications. It supports redundant 1Gbps Ethernet networks for both control and I/O communication, plus a dedicated 1Gbps tracking network for dual-unit synchronisation. Furthermore, the MPU50 manages up to 48 Nexus I/O modules across four intelligent high-speed serial buses, all within a 40ms scan cycle. With NTP time synchronisation and 1ms SOE accuracy, this controller is purpose-built for power generation, oil and gas, and large-scale process automation.

Processor and Memory Architecture

CPU and Processing Power
The GE MPU50 integrates an Intel 64-bit embedded processor clocked at 1.66GHz. This architecture delivers substantial computational headroom for complex control algorithms, logic execution, and data logging. The processor operates without active cooling, ensuring reliability in industrial environments. Moreover, the 64-bit data path enhances performance for floating-point and integer calculations commonly found in process control applications.

System Memory and Storage
Onboard memory includes 1GB of DDR2 SDRAM operating at 667/800 MHz, providing ample space for control programs, runtime data, and communication buffers. Additionally, the MPU50 features 2GB of non-volatile flash memory for persistent storage of configuration files, application logic, and historical logs. This flash memory retains data during power loss, eliminating the need for external storage devices.

Real-Time Operating System
The module runs the QNX real-time multitasking operating system, known for its microkernel architecture and deterministic response. The MPU50 leverages QNX's priority-based scheduling to guarantee time-critical tasks meet their deadlines. Furthermore, the OS supports up to 999 control configuration pages, giving engineers extensive capacity for complex sequencing and interlocking logic.

Communication and Networking

Redundant Control Networks
Dual 1Gbps Ethernet ports provide redundant UDH control network connectivity. These ports support automatic failover, ensuring uninterrupted communication with the supervisory system. The GE MPU50 implements standard TCP/IP protocols, enabling seamless integration with DCS, SCADA, and HMI platforms.

Redundant I/O Network
A separate pair of 1Gbps Ethernet ports handles I/O communication with Nexus expansion racks. This dedicated network isolates I/O traffic from control network congestion, improving overall system responsiveness. The MPU50 uses a proprietary protocol optimised for deterministic data exchange.

High-Speed Serial I/O Buses
Four intelligent high-speed redundant serial I/O buses operate at 1Mbps each. Every bus accommodates up to 12 Nexus I/O modules, giving the MPU50 a total capacity of 48 I/O modules. This architecture supports distributed I/O placement, reducing field wiring costs. Additionally, each bus features redundancy, so a single cable fault does not compromise system operation.

Dual-Unit Tracking Network
A dedicated 1Gbps tracking network enables synchronisation between two MPU50 units in a hot-standby configuration. This link exchanges status, configuration, and real-time data to ensure bumpless transfer during primary unit failures. The tracking network operates independently of control and I/O networks, enhancing overall system reliability.

Time Synchronisation
The GE MPU50 supports NTP network clock synchronisation with ±1ms accuracy. This precision ensures consistent time-stamping across all connected I/O modules, particularly the SOE data with 1ms resolution. Consequently, operators can accurately sequence events across the entire plant.

Performance and Capacity

Scan Cycle
The MPU50 completes a full control cycle in as little as 40ms. This fast cycle time suits applications requiring rapid response, such as turbine protection, motor control, and fast-acting interlock systems. The deterministic execution ensures predictable performance regardless of network loading.

Control Configuration Capacity
Engineers can create up to 999 control configuration pages within the MPU50. Each page contains logic diagrams, function blocks, and sequencing instructions. This extensive capacity supports large-scale applications without requiring multiple controllers.

I/O Capacity
The module supports a maximum of 48 Nexus I/O modules distributed across the four serial buses. This configuration provides up to 768 digital points or 192 analog channels in a single MPU50 system. For larger installations, multiple MPU50 units can coordinate via the tracking network.

Power and Environmental Parameters

Power Input
Redundant 24V DC power inputs (21.6–26.4V range) ensure continuous operation. The MPU50 consumes typical power of 15V at 3A (45W), with the power cord included in the package. This redundant design protects against single power supply failures.

Physical Dimensions
The module measures 209mm in height, 129.5mm in width, and 51mm in depth. The standard Nexus form factor ensures compatibility with all Nexus racks.

Environmental Limits
Operating temperature ranges from 0°C to 60°C, with relative humidity between 10% and 90% (non-condensing). Vibration resistance covers 10–500Hz at acceleration not exceeding 10m/s². The MPU50 meets the same dust tolerance as other Nexus modules: particles larger than 0.5µm limited to fewer than 18,000 per litre.

Regulatory Compliance
The MPU50 complies with CFR 47 FCC Part 15: 2009, EN 61326-1: 2006, CISPR 11: 2007, and IEC 61000-4-2/3/4/5/6/8/11. It carries CE certification as part of the complete Nexus system.

Installation Guidance

Mounting Instructions
Secure the GE MPU50 to the Nexus rack using the provided screw kit. Align the backplane connector carefully before seating the module. Tighten screws in a cross pattern to ensure even pressure and reliable electrical contact.

Network Connections
Connect the dual control network ports to the primary and secondary Ethernet switches. Use CAT5e or CAT6 shielded cables for all 1Gbps connections. Similarly, connect the I/O network ports to the Nexus I/O racks. The MPU50 automatically detects network redundancy and activates failover protocols.

Power Connection
Apply both 24V DC supplies simultaneously for full redundancy. The module draws up to 3A at 15V, which equates to approximately 45W. Use appropriately sized power cables and circuit protection.

Tracking Network Setup
For hot-standby configurations, connect the dedicated tracking ports between the primary and secondary MPU50 units. Use a direct crossover cable or a dedicated switch for this link to minimise latency.

Packaging List

• GE MPU50 iDPU controller module × 1

• Power cord (15V 3A rated) × 1

• Screw mounting kit (screws and washers) × 1 set

• Product label with serial number × 1

• Quick installation guide (printed) × 1

Shipping Method: FedEx, UPS, DHL

Frequently Asked Questions

Q1: What is the maximum number of I/O modules the MPU50 can support?
The GE MPU50 supports up to 48 Nexus I/O modules across its four high-speed serial buses. Each bus accommodates 12 modules, giving a total capacity of 48.

Q2: Can the MPU50 operate in a hot-standby redundant configuration?
Yes. Two MPU50 units can be configured in a hot-standby pair using the dedicated 1Gbps tracking network. This setup enables automatic failover without process interruption.

Q3: What programming languages or environments does the MPU50 support?
The GE MPU50 runs QNX and supports IEC 61131-3 programming languages through GE's configuration tools. Additionally, custom C/C++ applications can be developed for advanced functionality.

Q4: What is the purpose of the redundant I/O networks?
The dual 1Gbps I/O Ethernet ports provide redundant communication paths to Nexus I/O racks. If one network path fails, the MPU50 automatically switches to the secondary path, maintaining uninterrupted I/O data exchange.

Q5: Does the module include a real-time clock for time-stamping?
Yes. The MPU50 includes an internal real-time clock that synchronises with NTP servers. This provides ±1ms accuracy for system-wide time-stamping, ensuring SOE events are accurately sequenced.