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The GE IS215VCMIH1BB is a VME Communications Interface Module for the GE Mark VI turbine control system. The VCMI functions as a communication interface between the Mark VI controller and associated I/O boards while also providing access to the system control network.
The module operates as a VME bus master within the Mark VI control and I/O architecture. It manages data exchange between the controller, I/O boards, and other associated control hardware installed in the rack.
The IS215VCMIH1BB also interfaces with IONet, the communication network used within the Mark VI control architecture. Its communication and diagnostic interfaces support system operation, configuration, and maintenance activities.
The IS215VCMIH1BB is a revised VCMI assembly with B-rated functional revisions. Its full model designation should be used when matching replacement hardware to an existing Mark VI installation.
| Parameter | Specification |
|---|---|
| Product | IS215VCMIH1BB |
| Product Type | VME Communications Interface Module |
| Functional Acronym | VCMI |
| Series | Mark VI |
| System | GE Speedtronic Mark VI |
| Board Type | 6U VME Board |
| VME Function | Bus Master |
| IONet Interface | 10Base2 Ethernet |
| Serial Interface | RS-232C |
| Parallel Interface | IEEE 1284 EPP Version 1.7 |
| Processor | Texas Instruments TMS320C32 32-bit DSP |
| PCB Coating | Conformal Coating |
| Dimensions | 330 × 20 × 178 mm |
| Weight | 0.4 kg |
The IS215VCMIH1BB operates as the communication bridge between the Mark VI controller, VME-based I/O boards, and the system control network.
Within the rack, the VCMI acts as the VME bus master and manages data transfers between the controller and connected I/O hardware. This allows process information collected by I/O boards to move toward the controller while control information can be distributed back through the rack.
The module also provides the connection to IONet. Through this network interface, the Mark VI control architecture exchanges information with the appropriate control-system elements.
The processor and associated communication hardware manage these data exchanges while the front-panel indicators provide status information that can be used during commissioning and troubleshooting.
| System Element | Role |
|---|---|
| Mark VI Controller | Executes turbine control and application logic |
| VME Backplane | Provides the internal communication path between installed boards |
| IS215VCMIH1BB | Acts as the VME communications interface and bus master |
| I/O Boards | Acquire field inputs and generate control outputs |
| IONet | Provides the Mark VI system control network connection |
| Terminal Boards | Provide field-side connections for turbine instrumentation and control devices |
| Engineering / Operator Interface | Supports configuration, monitoring, and diagnostics |
| Application | Typical Use |
|---|---|
| Gas Turbine Control | Internal communication between Mark VI control and I/O hardware |
| Steam Turbine Control | Supporting VME-based control-system data exchange |
| Power Generation | Maintaining communication within turbine control cabinets |
| Turbine Monitoring | Transferring process and diagnostic information between system modules |
| Control System Maintenance | Replacement of VCMI communication interface hardware |
| Legacy Mark VI Service | Maintaining established GE Speedtronic turbine control installations |
| Component | Function |
|---|---|
| Mark VI Controller | Executes turbine control and protection functions |
| Mark VI VME I/O Boards | Exchange process signals with the control system |
| VME Backplane | Provides internal board-to-board communication |
| IONet Network | Provides communication between Mark VI control-system elements |
| Terminal Boards | Interface field wiring with the turbine control system |
| Engineering Workstation | Supports configuration, monitoring, and diagnostics |
| Model | Application / Relationship |
|---|---|
| IS215VCMIH1B | Earlier VCMI assembly in the Mark VI family |
| IS200VCMIH1B | Corresponding Mark VI VME communications interface board |
| IS215VCMIH2BB | Related VCMI communications interface assembly |
| IS215VAMBH1A | Mark VI acoustic monitoring card assembly |
| IS200VVIBH1C | Mark VI vibration monitoring-related board |
The IS215VCMIH1BB is a VME Communications Interface Module used in GE Mark VI turbine control systems to manage communication between the controller, I/O boards, and the Mark VI control network.
VCMI refers to VME Communications Interface. The module provides the communication interface and operates as a VME bus master within the Mark VI control and I/O architecture.
The module includes an IONet 10Base2 Ethernet interface, an RS-232C serial interface, and a parallel interface supporting EPP Version 1.7.
The complete part number and revision should be matched with the existing Mark VI configuration. The VME rack position, backplane connection, IONet connection, module status indicators, and communication diagnostics should be checked after installation.