GE IS215VCMIH2C VCMI VME Bus Master Communication Interface Module

Product Description

GE IS215VCMIH2C (VCMI = VME Communications Interface) is a core VME communication master board dedicated to GE Mark VI triple redundant (TMR) gas & steam turbine control racks. It acts as the central data exchange hub to realize high-speed deterministic communication between the main CPU, VME backplane I/O cards, expansion racks, overspeed protection boards (IS215VPROH series), and remote terminal assemblies.

It integrates 3 independent 10Base2 IONet coaxial network ports to build the turbine system’s proprietary control network, supporting multi-rack interconnection and TMR 2oo3 safety voting data transmission. A DB9 RS232 serial port is reserved for local debugging, firmware download and real-time fault monitoring. Equipped with a TI 32-bit DSP processing chip, it undertakes network data packaging, signal filtering and fault diagnosis tasks to offload the main controller’s communication burden.

All circuit boards adopt conformal coating to resist dust, humidity and salt spray in high-vibration turbine rooms. The suffix C represents the optimized industrial upgraded revision, widely deployed as critical maintenance spare for thermal power combined cycle units, offshore platform power turbines and industrial large compressor control cabinets.

Technical Specifications

PN: IS215VCMIH2C, Manufacturer: GE Vernova USA

Core Hardware

Processor: TI 32-bit dedicated DSP for real-time communication scheduling

Memory: 32K dual-port SRAM + onboard Flash for firmware storage

Bus Standard: VME64 single-slot rack module, P1/P2 dual VME backplane connectors

Power Supply: 24VDC rack backplane input (18–32VDC), power consumption ~25W

Front Panel Interfaces

3 × BNC IONet 10Base2 coaxial Ethernet ports, each with independent TX/RX/CD status LEDs

1 × DB9 RS232 serial debug port for local configuration & fault upload

Multi-channel status LEDs: Run, Fail, Status, 1/2/4/8 channel indicators

Manual reset pushbutton for module soft restart

Communication Performance

IONet transmission rate: 10Mbps token ring deterministic bus

Supports TMR triple redundant network synchronization, millisecond-level data refresh

Compatible with all Mark VI VME I/O boards, VPRO protection modules and TREG terminal boards

Environmental Parameters

Operating Temperature: -40℃ ~ +70℃; Storage: -40℃ ~ +85℃

Humidity: 5%–95% non-condensing, conformal coated PCB anti-corrosion

Anti-interference: Meets industrial EMC surge, ESD and vibration standards for turbine halls

Dimension: 263 × 138 × 88 mm, Weight ~2.35kg

Configuration Tool: GE ControlST software suite

Key Features

Dedicated VME bus master architecture, centrally scheduling all backplane I/O and cross-rack communication data to avoid bus congestion.

Three independent IONet coaxial ports support multi-segment redundant control network layout, guaranteeing uninterrupted data transmission for turbine safety protection logic.

Built-in DSP real-time data preprocessing, with hardware signal filtering to eliminate EMI interference from high-vibration turbine equipment.

Complete self-diagnosis function to detect port disconnection, cable short circuit, bus failure and module operation anomalies, with clear LED fault indication.

Native compatibility with Mark VI TMR triple modular redundant safety architecture, realizing synchronous voting of overspeed, temperature and trip signals across three control racks.

RS232 local debugging port supports offline firmware upgrade and fault waveform recording without network access.

Conformal coated PCB design adapts to severe industrial environments with oil mist, dust and salt spray in power plants and offshore platforms.

Standard single-slot VME plug-in design, direct replacement without modifying rack wiring during equipment overhaul.