ABB HESG Series Modules – HESG447024R2

Name: ABB HESG Series Modules – HESG447024R2
Brand: ABB

Model: HESG447024R2

Brand ABB

Series HESG447024R2

Model HESG447024R2

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Product Details And Specifications

ABB HESG Series Technical Notes

The ABB HESG series represents a core family of process automation modules deployed across global heavy industry, including petrochemical refineries, nuclear power stations, offshore platforms, and large-scale chemical processing facilities. Originally developed as part of ABB's Advant and Master distributed control system (DCS) architecture, HESG-designated modules provided the foundational I/O, communication, and processing infrastructure for plants requiring high-availability, deterministic control. Installations of this series remain active in facilities with 20–30 year operational lifecycles, making spare parts availability a critical operational concern for maintenance engineers worldwide.

The Evolution of HESG Architecture

The HESG module family was introduced as part of ABB's Advant Controller (AC) platform, specifically the AC 450 and Master series systems. Early HESG modules operated on the Advant Fieldbus (AF 100) and RCOM serial bus infrastructure, providing deterministic scan-cycle communication between the process controller and field I/O. As ABB transitioned through successive DCS generations—from Advant OCS to Industrial IT (System 800xA)—the HESG series maintained backward compatibility within its native backplane architecture but was not forward-migrated to the 800xA S800 I/O standard.

By the mid-2000s, ABB formally classified the majority of HESG-designated modules as mature or end-of-life, with active production ceasing for most variants. Plants running Advant AC 450 or Master M90/M100 controllers that incorporate HESG modules now operate in a lifecycle extension phase, dependent on the secondary market and specialist distributors for replacement units. Compatibility between HESG sub-variants is revision-dependent; engineers must verify hardware revision codes (R1, R2, R3, etc.) before substitution, as backplane connector pinouts and firmware handshake protocols differ across revisions.

HESG Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced modules within the ABB HESG series. Each entry reflects the module's primary functional classification within the Advant/Master DCS architecture.

HESG447024R2: Analog input module, 8-channel, 4–20 mA, Advant AC 450 backplane compatible, revision R2.
HESG447024R1: Analog input module, 8-channel, 4–20 mA, revision R1, earlier firmware baseline.
HESG447025R1: Analog output module, 4-channel, 4–20 mA, galvanically isolated outputs.
HESG447025R2: Analog output module, 4-channel, 4–20 mA, revision R2 with enhanced diagnostics.
HESG447026R1: Digital input module, 16-channel, 24 VDC, sink-type, Advant backplane.
HESG447026R2: Digital input module, 16-channel, 24 VDC, revision R2, improved noise immunity.
HESG447027R1: Digital output module, 16-channel, 24 VDC, source-type, 0.5 A per channel.
HESG447027R2: Digital output module, 16-channel, 24 VDC, revision R2, short-circuit protection.
HESG447028R1: Pulse input module, 8-channel, for flow and speed measurement signals.
HESG447029R1: Thermocouple input module, 8-channel, J/K/T/E type, cold junction compensation.
HESG447030R1: RTD input module, 8-channel, Pt100/Pt1000, 3-wire and 4-wire configuration.
HESG447031R1: Communication adapter module, RCOM serial bus interface, Master M90 compatible.
HESG447032R1: Power supply module, 24 VDC regulated, for HESG backplane rail distribution.
HESG447033R1: CPU processing module, Advant AC 450 controller card, 32-bit processor.
HESG447034R1: Redundancy switchover module, hot-standby CPU failover, bumpless transfer.
HESG447035R1: Fieldbus communication module, AF 100 Advant Fieldbus interface card.
HESG447036R1: Analog input module, 16-channel, high-density, multiplexed scanning architecture.

Quality Control for the HESG Range

HESG series modules present specific test challenges due to their multi-layer backplane bus architecture and mixed analog/digital signal paths. DriveKNMS applies the following test protocol to all HESG units prior to dispatch:

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