GE VCMI H2C IS215VCMIH2CC Modules

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Product Details And Specifications

GE VCMI H2C Series Technical Notes

The Evolution of VCMI H2C Architecture

The VCMI module family was introduced alongside the Mark VI control system in the mid-1990s as GE transitioned away from the Mark V's proprietary ARCNET-only topology toward a hybrid VME-bus architecture capable of supporting both legacy serial protocols and emerging Ethernet-based IONet. Early VCMI variants operated exclusively on ARCNET at 2.5 Mbps, providing deterministic communication for I/O packs in simplex and TMR (Triple Modular Redundant) configurations. The H2C hardware revision introduced dual-channel capability, enabling simultaneous management of two independent communication paths — a critical requirement for TMR systems where any single-channel failure must not interrupt control continuity. The IS215VCMIH2CC designation encodes this: IS215 = Mark VI board family, VCMI = function, H2C = hardware revision, C = conformal coating. Later firmware revisions expanded compatibility with the EX2100e excitation control platform. As GE transitioned toward the Mark VIe (IS420-series) architecture in the 2010s, the IS215 VCMI series entered a maintenance-only lifecycle. No direct plug-in replacement exists within the Mark VIe ecosystem; migration requires backplane and I/O pack reconfiguration. This positions the IS215VCMIH2CC as a long-term spare parts requirement for any site not yet committed to a full Mark VIe upgrade.

VCMI H2C Full Catalog & Functionalities (SKU List)

The following SKUs represent verified modules within the GE Mark VI IS215 / VCMI ecosystem. Each entry reflects a distinct hardware function within the turbine control architecture:

IS215VCMIH2CC: Dual-channel VME communications interface board, H2C revision, conformal coated
IS215VCMIH2CA: Dual-channel VME communications interface board, H2C revision, standard (non-coated)
IS215VCMIH1B: Single-channel VME communications interface, H1B revision, legacy ARCNET only
IS215VCMIH2CB: Dual-channel VME communications interface, H2C revision, intermediate firmware build
IS215UCVEH2A: VME controller board, Mark VI UCVEx family, dual Ethernet IONet ports
IS215ACLEH2A: AC line monitor module, Mark VI, 3-phase voltage/frequency acquisition
IS215DSVOH2A: Digital servo output module, 4-channel, 4–20 mA valve positioning
IS215RTDSH2A: RTD signal conditioning module, 16-channel, Pt100/Pt1000 compatible
IS215TRLYH2B: Relay output module, 16-channel, 24 VDC dry contact
IS215VRTDH2C: VME RTD interface module, dual-redundant input scanning
IS215AEPAH2B: Analog input module, 16-channel, ±10 V / 4–20 mA configurable
IS215BIASH2A: Bias power supply module, Mark VI backplane auxiliary rail
IS215CPNBH2A: Communication processor, PROFIBUS DP master interface
IS215GFOIH2A: Fiber optic interface module, multi-mode, IONet segment bridge
IS215PSVOH2B: Power supply output module, 28 VDC regulated, Mark VI rack
IS215UCVEH2B: VME controller board, H2B revision, enhanced memory and dual IONet
IS215VPROH2B: VME processor module, Mark VI main CPU, dual-core DSP architecture
IS215YDOAS1A: Digital output module, 32-channel, 24 VDC sourcing, Mark VI I/O pack