GE Mark VIe Modules IS215VCMIH2CC

Technical Dossier

Product Details And Specifications

GE Mark VIe Series Technical Notes

GE's Mark VIe platform succeeded the Mark VI and Mark V generations, retaining backward-compatible I/O wiring conventions while introducing an Ethernet-based IONet architecture. This transition extended the operational lifespan of existing turbine assets by decades, but it also created a large installed base of VME-format modules — including the IS215VCMIH2CC — that are no longer in active production yet remain essential to keep aging fleets operational.

The Evolution of Mark VIe Architecture

GE's turbine control lineage spans four decades. The Mark IV and Mark V systems (1980s–1990s) used proprietary serial communication buses with limited diagnostics. The Mark VI (late 1990s) introduced VME-based modular I/O and a more structured backplane topology. The Mark VIe (2000s–present) retained the VME physical form factor for many I/O and communication modules while migrating the control network to 100 Mbps Ethernet (IONet), enabling triple-redundant (TMR) controller configurations.

The IS215VCMIH2CC belongs to the IS215 module family — the VME-format card set that bridges the R, S, and T controller triplets to the I/O terminal boards via the VCMI (VME Communication Interface) function. Compatibility between Mark VI and Mark VIe VME modules is partial: physical connectors may match, but firmware and backplane addressing differ. Substitution without verified firmware alignment risks silent communication faults in TMR voting logic — a safety-critical failure mode.

As GE (now part of GE Vernova / GE Gas Power) has progressively shifted support toward the Mark VIe-S and Mark VIe-E platforms, the IS215 VME module family has entered end-of-life status. Field replacements now depend entirely on aftermarket inventory.

Mark VIe Full Catalog & Functionalities (SKU List)

The following SKUs represent the core IS200 and IS215 module families used within Mark VIe and Mark VI control systems. Each entry reflects a verified, commonly deployed part number:

Controllers & Processor Modules

• IS215UCVEH2A: Mark VIe main controller board, TMR-capable, primary CPU module
• IS200UCVEH2A: Mark VI controller board, predecessor to IS215UCVEH2A, VME format
• IS215ACLEH1A: AC line monitor module, monitors grid frequency and voltage for synchronization

VME Communication Interface Modules

• IS215VCMIH2CC: VME Communication Interface, Rev CC — IONet bridge between controller and I/O packs
• IS215VCMIH2AA: VME Communication Interface, Rev AA — earlier revision, same functional role
• IS200VCMIH2A: Mark VI VME Comm Interface, predecessor series, limited IONet support

Digital Input (DI) Modules

• IS200DTURH1A: Turbine digital I/O terminal board, interfaces discrete field signals
• IS200DIAGH1A: Diagnostic I/O board, monitors internal system health signals
• IS215DTURH2A: Updated turbine digital I/O terminal board for Mark VIe

Analog Input / Output Modules

• IS200AEPAH1A: Analog I/O terminal board, processes 4–20 mA field instrument signals
• IS200AEAAH1A: Analog input board for exhaust and ambient temperature measurement
• IS215AEPAH2A: Mark VIe analog I/O terminal board, updated revision

Power Supply Modules

• IS200EPSMH1A: Power supply module for Mark VIe I/O pack, 28 VDC output
• IS200EPSMH1B: Revised power supply module, improved thermal management
• IS215EPSMH2A: Mark VIe enhanced power supply, supports redundant power configurations

Communication & Network Adapters

• IS200VCRCH1A: VME carrier board for communication modules, backplane interface
• IS215VCOCH2A: VME communication option card, supports auxiliary protocol bridging

Sourcing Hard-to-Find & Obsolete Mark VIe Parts

DriveKNMS maintains dedicated inventory of IS215 and IS200 series modules sourced through controlled decommissioning projects, OEM surplus channels, and verified third-party refurbishers. Our inventory strategy is built around the reality that a single failed VCMI module — such as the IS215VCMIH2CC — can take a 200 MW gas turbine offline. The cost of that outage, measured against the cost of a stocked spare, makes pre-positioning inventory the only rational asset protection strategy.

Quality Control for the Mark VIe Range

VME-format communication modules present specific failure modes that require targeted inspection protocols. DriveKNMS applies the following verification steps to all IS215VCMIH2CC and related VME modules prior to dispatch:

• Electrolytic capacitor inspection: VME boards manufactured before 2010 are susceptible to capacitor aging on the 5V and 12V rails. Each board undergoes ESR (Equivalent Series Resistance) measurement to identify pre-failure capacitors before they cause field failures.
• Firmware version verification: The IS215VCMIH2CC carries embedded firmware that must match the controller revision in the target system. We document and disclose the firmware revision on every unit shipped.
• Backplane connector inspection: VME edge connectors are inspected under magnification for pin corrosion, bent contacts, and gold plating wear — the primary mechanical failure mode for modules that have been repeatedly inserted and removed.
• IONet communication test: Where test bench infrastructure permits, modules are powered and IONet packet exchange is verified against a reference controller.
• Visual and cosmetic inspection: Board-level inspection for burn marks, flux residue, unauthorized rework, and component substitution is completed and documented for every unit.