GE Mark VIe IS220P Series Modules – IS220PTURH1A

Technical Dossier

Product Details And Specifications

GE Mark VIe IS220P Series Technical Notes

The Evolution of IS220P Architecture

The Mark VIe platform succeeded the Mark VI (IS200 series) and Mark V systems, introduced by GE Power in the early 2000s as a fully digital, networked turbine control architecture. The IS220P series was developed as the second-generation I/O module family for Mark VIe, replacing earlier IS200P-prefix modules with enhanced diagnostics, improved EMI tolerance, and support for triple-redundant (TMR) control configurations. The IS220P modules communicate via the IONet protocol over standard 100BASE-TX Ethernet, a departure from the proprietary backplane buses used in Mark V and earlier Mark VI hardware. This architectural shift introduced compatibility constraints: IS220P modules are not backward-compatible with Mark V racks, and integration with Mark VI requires specific gateway configurations. As of 2020, GE (now part of GE Vernova) has transitioned active development to the Mark VIeS and Mark VIe for renewables platforms, placing the IS220P series in a mature/sustained-support lifecycle phase. Long-term maintenance customers represent the primary demand driver for IS220P inventory.

IS220P Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the GE Mark VIe IS220P series, classified by functional category:

Turbine I/O Modules

• IS220PTURH1A: Turbine I/O module, high-density; interfaces speed probes, flame detectors, and discrete turbine signals in Mark VIe TMR configurations.
• IS220PTURS1A: Turbine I/O module, simplex variant; single-channel turbine signal interface for non-redundant Mark VIe applications.
• IS220PTURA1A: Turbine I/O module, analog-enhanced; supports thermocouple and RTD inputs alongside discrete turbine I/O.

Analog Input Modules

• IS220PAICH1A: Analog input module, 16-channel; 4–20 mA and 0–10 V process signal acquisition for Mark VIe I/O packs.
• IS220PAICH1B: Analog input module, revision B; updated firmware for improved noise rejection on long-run field wiring.
• IS220PAIAH1A: Analog input module, high-accuracy; 0.1% full-scale accuracy for precision process measurement applications.

Digital Input Modules

• IS220PDICH1A: Digital input module, 24 VDC, 32-channel; dry contact and wet contact discrete signal acquisition.
• IS220PDIDH1A: Digital input module, high-density; 64-channel discrete input for large I/O count applications.

Digital Output Modules

• IS220PDOAH1A: Digital output module, 24 VDC sourcing; 32-channel relay-equivalent discrete output for solenoid and actuator control.
• IS220PDOCH1A: Digital output module, contact output; dry contact relay outputs for critical trip and alarm circuits.

Thermocouple Input Modules

• IS220PTCCH1A: Thermocouple input module, 16-channel; supports J, K, T, E, R, S, B type thermocouples with cold junction compensation.
• IS220PTCCH1B: Thermocouple input module, revision B; extended thermocouple type support including N-type for high-temperature exhaust measurement.

Speed & Vibration Modules

• IS220PVIBH1A: Vibration monitoring module; interfaces Bently Nevada-compatible proximity probes and velocity sensors for shaft vibration measurement.
• IS220PSVOH1A: Speed and voltage output module; generates speed reference signals and analog voltage outputs for governor control loops.

Servo & Valve Control Modules

• IS220PSVCCH1A: Servo valve control module; 4–20 mA and ±10 V servo command output for hydraulic control valve positioning in fuel and inlet guide vane systems.

Communication & Power Modules

• IS220PCOMH1A: Communication module; Modbus RTU and Modbus TCP gateway for integration with third-party SCADA and historian systems.
• IS220PPWRH1A: Power supply module; 24 VDC regulated output for IS220P I/O pack rail power distribution.

Quality Control for the IS220P Range

IS220P modules present specific test challenges due to their IONet Ethernet communication dependency and multi-channel analog calibration requirements. DriveKNMS applies the following test protocol to all IS220P units prior to dispatch: (1) Visual inspection for backplane connector pin damage, capacitor swelling, and conformal coating integrity. (2) Power-on functional test using a Mark VIe-compatible I/O pack test bench, verifying IONet link establishment and module self-diagnostic pass status. (3) Channel-level verification for analog input modules: each channel is stimulated with calibrated 4–20 mA and thermocouple signals, with output values compared against factory calibration tolerances. (4) Digital I/O modules are cycled through all 32 or 64 channels under load to verify output driver integrity and input threshold accuracy. (5) Turbine I/O modules (including IS220PTURH1A) undergo speed signal simulation using a pulse generator to verify frequency counting accuracy across the 0–20,000 RPM measurement range. (6) Final burn-in at operating temperature for a minimum of 4 hours before packaging.