GE HE693RTM705
GE HE693RTM705 - Image 2

GE HE693RTM705

Product Introduction: The HE693RTM705 is the primary CPU (Central Processing Unit) module for the Mark VIe control system. It executes the control logic, protection algorithms, and communication protocols. It features a dual-redundant processor architecture with automatic failover, making it the brain of the entire Mark VIe system.

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Category: SKU: GE HE693RTM705

Description

GE HE693RTM705

Technical Specifications:

  • Processor: 32-bit RISC processor @ 200 MHz
  • Memory: 256 MB RAM, 512 MB flash storage
  • Redundancy: Dual processor, hot standby, automatic failover (<50 ms switchover)
  • Communication: Ethernet, Serial (RS-232/RS-485), Genius bus, Mark VIe backplane
  • Protocols: Modbus TCP/IP, PROFINET, DNP3, IEC 61850 (optional)
  • Scan Time: 10 ms typical for full I/O update
  • Power: ~15 W
  • Operating Temp: 0°C to 60°C
  • MTBF: >300,000 hours

Functional Features:

  • Executes control logic written in Function Block Diagram (FBD) or Structured Text
  • Built-in turbine protection functions (overspeed, overtemperature, vibration)
  • Event logging with timestamp accuracy of 1 ms
  • Web server for remote diagnostics
  • Supports online logic download without system stop

Application Scenarios:

  • Gas turbine control (Frame 5, 6, 7, 9E, 9FA, 9HA)
  • Steam turbine control and protection
  • Generator protection and excitation control
  • Combined cycle plant coordinated control

Material Composition:

  • PCB: 8-layer high-speed design with embedded power planes
  • Processor: Military-grade qualified component
  • Memory: Industrial-grade NAND flash with wear leveling
  • Enclosure: Aluminum alloy with thermal management fins

Working Principle: The CPU runs the control application in a real-time operating system (VxWorks or similar RTOS). It reads all I/O data via the backplane through the PBM, executes the control algorithm every 10 ms scan cycle, and writes output commands to the DAC and digital output modules. The redundant processor runs in lockstep and takes over instantly if the primary fails. Installation Requirements:

  • Install in CPU slot with redundant partner in adjacent slot
  • Connect Ethernet for HMI/SCADA communication
  • Configure IP address and subnet mask via front panel or software
  • Connect serial port for initial commissioning

Usage Precautions:

  • Never change CPU firmware without a valid backup
  • Maintain battery backup for RAM retention during power loss
  • Synchronize time via NTP or GPS for accurate event logging

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