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GE IS200VCMIH2B

  • Product Name: GE IS200VCMIH2B Mark VI VME Communications Interface Board (VCMI)
  • Product Introduction: The IS200VCMIH2B is a VME Communications Interface (VCMI) board developed for the GE Mark VI turbine control system. It is installed in the Central Control Module and provides internal communication between I/O boards in the rack and communication with other control or protection modules through the IONet network.
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Detailed content

  • Technical Specifications:
    • Series: Mark VI Speedtronic
    • Board type: VME Communications Interface / VME Bus Master Controller Board
    • Functional acronym: VCMI
    • Board format: 6U VME
    • Processor: Texas Instruments TMS320C32 32-bit DSP
    • IONet interfaces: 3 × 10Base2 Ethernet, BNC connectors, 10 Mbps
    • Serial interface: 1 × RS-232C, 9-pin D-sub; 9,600 / 19,200 / 38,400 bps
    • Parallel interface: 1 × 8-bit bidirectional EPP (IEEE 1284)
    • VME function: VME bus master / internal rack communication
    • Memory: 32 KB dual-port memory; SRAM 64k×32; Flash 128k×8
    • Functional revision: B
    • Mounting: Mark VI Central Control Module / VME Rack (slot 1)
    • Dimensions: ~26.2 × 16 × 2 cm
    • Weight: ~0.8–1.2 kg
    • Origin: USA
  • Functional Features: Provides 3 IONet ports for Simplex and TMR configurations; uses Software Implemented Fault Tolerance (SIFT) voting for redundancy; faceplate includes IONet1/2/3 BNC connectors, reset switch, 9-pin serial, and diagnostic LEDs.
  • Working Principle: Acts as the VME bus master — votes on input data from each IONet connection (R, S, T channels) and distributes results to controller databases via the VME backplane; communicates with other VCMI cards and I/O racks over IONet at 10 Mbps.
  • Frame Rate: Simplex systems: 10 ms (100 Hz); TMR systems: 40 ms (25 Hz).
  • Application Scenarios: GE gas/steam turbine control, power generation plants, industrial turbine automation, Mark VI IONet communication, Simplex and TMR control architectures.
  • Installation & Use: Install in slot 1 of the Central Control Module; verify the VME backplane connectors and ensure the board is correctly seated; connect IONet wiring per the existing Mark V/VI configuration; for TMR, verify all three IONet connections; after power-up, check diagnostic LEDs and confirm IONet communication.
  • Usage Notes: VCMI variants can look nearly identical but differ in revision and configuration — match the complete part number and hardware revision before substitution; confirm the board’s functional revision (B) is compatible with the existing Mark VI rack architecture.

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