GE HEC Series Modules – HEC-GV3-DNG

Name: GE HEC Series Modules – HEC-GV3-DNG
Brand: General Electric

Model: HEC-GV3-DNG

Brand General Electric

Series HEC-GV3-DNG

Model HEC-GV3-DNG

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Technical Dossier

Product Details And Specifications

GE HEC Series Technical Notes

The Evolution of HEC Series Architecture

The HEC series was introduced alongside the Mark VI platform in the mid-1990s as GE Speedtronic transitioned from relay-based turbine control to fully digital DCS architecture. Early HEC modules operated on a VME-based backplane with proprietary GE IONet communication. The transition to Mark VIe in the 2000s introduced Ethernet-based I/O (IONET over 100BASE-TX), requiring updated power supply modules with tighter voltage regulation tolerances to support the expanded I/O density.

HEC Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked HEC series components used across Mark VI and Mark VIe DCS installations. Classified by functional category:

Power Supply Modules

HEC-GV3-DNG: 28VDC regulated power supply, Mark VI cabinet primary rail
HEC-GV3-DNH: 28VDC power supply, enhanced thermal variant for high-ambient enclosures
HEC-GV3-DNA: 24VDC output power supply, early Mark VI cabinet revision
HEC-GV3-DNB: Dual-output 28V/5V power supply for mixed I/O backplanes
HEC-GV3-DNC: Redundant power supply module, hot-swap capable, Mark VI TMR systems
HEC-GV3-DND: 48VDC bus power supply for high-density I/O expansion racks
HEC-GV3-DNF: Field power distribution module, 24VDC loop power for 4-20mA circuits

Controller / CPU Modules

IS200HECHA1A: HEC controller board, Mark VI main processor assembly
IS200HECSA1A: HEC simplex controller, single-channel turbine control applications
IS200HECTA1A: HEC TMR (Triple Modular Redundant) controller, safety-critical turbine trips
IS200HECCA1A: HEC communication controller, IONet interface for Mark VI I/O expansion

I/O Interface Modules

IS200HEAIA1A: Analog input module, 16-channel 4-20mA, Mark VI HEC rack
IS200HEDOA1A: Digital output module, 24VDC discrete outputs, HEC backplane
IS200HEDIA1A: Digital input module, 32-channel 24VDC, HEC I/O rack
IS200HERGA1A: Relay output module, 16-channel SPDT, HEC series field termination
IS200HESPA1A: Speed/position input module, magnetic pickup and encoder inputs, HEC rack

Communication & Network Modules

IS200HECCA1B: IONet Ethernet communication adapter, 100BASE-TX, Mark VIe HEC
IS200HECNA1A: PROFIBUS DP gateway module, HEC series fieldbus integration

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