GE IS215VCM1H2CC Analog Input Board – Mark VI Series Modules

Technical Dossier

Product Details And Specifications

GE IS215 Series Technical Notes

The GE IS215 series represents the core I/O and control module family within the Mark VI Turbine Control System, developed by GE Energy (now part of GE Vernova). Deployed across heavy industrial sectors — including petrochemical refineries, nuclear power stations, combined-cycle gas turbine plants, and offshore platforms — the Mark VI platform has accumulated a global installed base measured in tens of thousands of turbine control units. The IS215 series modules interface directly with the Mark VI VME-based backplane, handling analog signal conditioning, digital I/O, communication bridging, and power distribution. Their ruggedized design targets continuous-duty environments with high electromagnetic interference, wide temperature ranges, and strict functional safety requirements (SIL 2 capable configurations). As of 2026, the Mark VI platform is in its mature/end-of-active-production phase, with GE Vernova transitioning customers toward the Mark VIe architecture. Long-term maintenance and spare parts sourcing for IS215 modules is now a critical operational concern for asset owners committed to multi-decade turbine lifecycles.

The Evolution of IS215 Architecture

The IS215 module family was introduced alongside the Mark VI platform in the mid-1990s as a successor to the Mark V (IS200 series) control architecture. The transition from Mark V to Mark VI brought a shift from proprietary serial backplane communication to a VME-bus architecture with deterministic real-time processing, enabling tighter turbine protection loop timing. Early IS215 revisions (suffix codes H1, H1A) established the baseline I/O signal ranges and backplane connector pinouts. Subsequent hardware revisions (H2, H2A, H2B) introduced improved EMI shielding, revised FPGA firmware for higher-resolution A/D conversion, and enhanced thermal management on power-dissipating analog front ends. The IS215VCM1H2CC specifically represents a second-generation analog input board with dual-channel voltage/current measurement capability, used in turbine exhaust temperature and vibration monitoring loops. Compatibility between H1 and H2 hardware revisions requires firmware alignment at the UCCA/UCCE controller level — cross-revision substitution without firmware validation is not supported. The Mark VIe (IS420 series) successor platform is not backplane-compatible with IS215 hardware; migration requires full rack replacement and I/O reconfiguration.

IS215 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the GE Mark VI IS215 series, organized by functional category:

Analog Input Modules

• IS215VCM1H2CC: Dual-channel analog voltage/current input board for turbine monitoring loops.
• IS215VCMIH1C: First-generation analog input board; baseline H1 revision for Mark VI racks.
• IS215AEPAH1B: Analog input expansion board supporting thermocouple and RTD signal types.
• IS215AEAAH1A: Analog input board for 4–20 mA process variable acquisition in DCS loops.
• IS215AEPAH2A: Second-generation analog expansion board with improved cold-junction compensation.

Digital Input / Output Modules

• IS215DSVOH1B: Digital servo output board for electrohydraulic valve control in turbine fuel systems.
• IS215DSVOH2A: Revised digital servo output with enhanced short-circuit protection on output drivers.
• IS215DIPAH1B: Digital input board, 24 VDC logic, for discrete field device status acquisition.
• IS215DIPAH2A: Second-generation digital input board with improved optical isolation on all channels.
• IS215DSPXH1B: Digital speed input board for magnetic pickup and proximity probe signals.

CPU / Controller Modules

• IS215UCVEH2A: VME controller board; primary CPU for Mark VI R, S, T redundant control triplex configurations.
• IS215UCAAH1A: Application controller board for non-redundant Mark VI simplex turbine control.
• IS215UCAEH2A: Enhanced application controller with expanded memory for complex control sequences.

Communication & Network Modules

• IS215ENETIH1A: Ethernet interface board for Mark VI HMI and historian network connectivity.
• IS215ENETIH2A: Second-generation Ethernet board with dual-port redundant network support.
• IS215GFOIH1B: Fiber optic I/O interface board for noise-immune field device communication.

Power Supply Modules

• IS215PSVIH1A: 28 VDC power supply input board for Mark VI rack power distribution.
• IS215PSVOH1B: Power supply output board; distributes conditioned DC power to I/O module backplane slots.