Description

The GE SD-98762 (Part Number: 101-098762-001) is a 32-channel digital (discrete) input module engineered for the GE Mark VIe family of turbine control and safety systems—widely deployed in gas turbines, steam turbines, compressors, and balance-of-plant applications across power generation, oil & gas, and industrial facilities.

This module interfaces field devices such as limit switches, pressure switches, temperature alarms, valve position indicators, and emergency pushbuttons, converting their dry-contact or powered contact states into logic-level signals for the Mark VIe controller. The SD-98762 supports both wetted (internally powered) and dry contact configurations, with built-in opto-isolation for electrical noise immunity in high-voltage environments like switchyards or motor control centers.

Designed for mission-critical reliability, the SD-98762 101-098762-001 is conduction-cooled, operates across extended temperature ranges, and integrates seamlessly into Mark VIe I/O packs mounted in ruggedized chassis (e.g., IC698 or Hybricon-based racks). It is certified for use in SIL 2 safety functions per IEC 61508, making it suitable for partial-stroke testing, fire/gas detection inputs, and turbine trip initiation circuits.

As part of GE’s long-lifecycle support strategy, this module remains available for both new installations and brownfield spares—ensuring decades of operational continuity for critical energy infrastructure.

SD-98762 101-098762-001

Technical Specifications

Main Features and Advantages

✅ High Channel Density: 32 inputs in a single 6U module reduces rack space and wiring complexity.

✅ Robust Noise Immunity: Opto-isolation and differential sensing reject common-mode noise from VFDs, relays, and arc furnaces.

✅ Flexible Field Wiring: Supports both passive (dry) and active (wetted) contacts—ideal for legacy switch integration.

✅ Real-Time Diagnostics: Each channel reports status (open, short, valid) to the Mark VIe controller via ToolboxST software.

✅ Conduction-Cooled Reliability: No moving parts; ideal for sealed enclosures in dusty, humid, or explosive atmospheres.

✅ Long-Term Availability: GE continues to support Mark VIe I/O modules like the SD-98762 for 20+ years post-introduction.

Application Field

The GE SD-98762 101-098762-001 is primarily used in:

• Gas & Steam Turbine Control: Monitoring bearing vibration switches, lube oil pressure, filter differential pressure, and fire detection.

• Compressor Stations: Reading suction/discharge valve limit switches and surge control alarms.

• Combined Cycle Plants: Interfacing with HRSG (Heat Recovery Steam Generator) level and temperature switches.

• Pipeline & LNG Facilities: Receiving ESD (Emergency Shutdown) signals from remote terminal units (RTUs).

• Retrofit Projects: Replacing older Mark V or Mark IV discrete input cards during control system modernization.

SD-98762 101-098762-001

Related Products

• TB-98762: Terminal base block for field wiring to SD-98762

• SD-98763 (101-098763-001): 16-channel digitaloutput module

• SA-98764 (101-098764-001): 16-channel analog input module

• Mark VIe Controller (e.g., VCMIH, VPRO): Central processing unit that communicates with SD-98762

• Hybricon Chassis (e.g., PCI354 series): Rugged backplane platform often used with Mark VIe I/O

• ToolboxST: GE’s engineering software for configuration, diagnostics, and trending