GE MMI301

The GE MMI301 is a Human-Machine Interface (HMI) module belonging to the General Electric (GE) Mark VI series. It is specifically designed for the operation and monitoring of gas turbines, steam turbines, and industrial control systems. This module provides a localized operation interface, enabling engineers and operators to directly access control parameters, alarm information, and equipment status without relying on a supervisory control system.

Core Values of MMI301

• Real-time Monitoring: Displays key parameters (such as rotational speed, temperature, pressure) and alarm statuses.
• Local Control: Supports manual operations (e.g., start/stop, valve adjustment).
• Fault Diagnosis: Stores historical event records to facilitate quick troubleshooting.

Product Specifications

• Product Model: MMI301
• Manufacturer: General Electric (GE)
• Product Type: Human-Machine Interface (HMI) Module
• Display Type: Monochrome LCD (128×64 pixels)
• Input Method: Key operation (navigation keys + function keys)
• Communication Interface: RS-485 (Modbus RTU)
• Compatible System: GE Mark VI Turbine Control System
• Operating Temperature Range: 0°C to +60°C (32°F to +140°F)
• Protection Class: IP20 (must be installed in a control cabinet)
• Power Supply Voltage: 24V DC (±10%)
• Power Consumption: ≤5W (typical)
• Certification Standards: CE, UL 508

Structure and Composition

The MMI301 adopts a compact industrial design, with main components including:

• LCD Display Module: A monochrome LCD screen with adjustable backlight, suitable for different lighting environments.
• Key Panel: 6 function keys (F1-F6) and direction navigation keys, supporting menu operations.
• Communication Circuit: Features an RS-485 interface, which communicates with the Mark VI controller via the Modbus RTU protocol.
• Status Indicators: LEDs display power (PWR), communication (COM), and alarm (ALM) statuses.
• Enclosure: Made of metal material, providing EMI shielding and mechanical protection.

Main Features and Advantages

1. Real-time Data Monitoring
   • Displays key parameters such as rotational speed, temperature, pressure, and vibration, with a refresh rate of ≤1 second.
   • Alarm lists pop up automatically to indicate fault types (e.g., over-temperature, over-speed).
2. Convenience of Localized Operation
   • Directly adjusts setpoints (e.g., load commands) or manually controls equipment (e.g., starts the lubricating oil pump) via keys.
   • No need to connect to a supervisory control system, making it suitable for quick intervention in emergency working conditions.
3. Fault Diagnosis Assistance
   • Stores the latest 100 event records (with timestamps) and supports query filtering by time/type.
   • Exports records via the ToolboxST software for in-depth analysis.
4. Industrial-grade Reliability
   • Operates in a wide temperature range (0°C to +60°C), adapting to the environment of power plant control rooms.
   • Features anti-electromagnetic interference design, complying with the IEC 61000-4 EMC standard.

Application Fields

• Power Generation Industry: Local operation stations for gas turbines/steam turbines (e.g., emergency shutdown).
• Oil and Gas Industry: On-site monitoring and parameter adjustment of compressor stations.
• Industrial Drives: Human-machine interaction interface for large motor control cabinets.

Related Products

• IS200ERMG: Mark VI controller, main control unit.
• DS200TBCAG1AAA: Signal terminal board, used as a matching component.
• QuickPanel+ QPK3D200S2P: Advanced HMI, a function expansion option.

Installation and Maintenance

Installation Key Points

• Fix it to the control cabinet panel with screws (refer to the manual for opening dimensions).
• Use shielded twisted-pair cables for the RS-485 bus, and set the terminal resistance to 120Ω (for end nodes).

Maintenance Recommendations

• Regularly clean the display screen (wipe with a soft cloth to avoid scratches).
• Check the response sensitivity of the keys (wear may occur after long-term use).

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