GE IS200RAPAG1B RACK POWER SUPPLY BOARD

TECHNICAL SPECIFICATIONS

Manufacturer: General Electric (GE) Industrial Systems
Series: Mark VI Speedtronic / Innovation Series
Product Type: Rack Power Supply Board / PCB Assembly
Functional Revision: B (Functional upgrade from IS200RAPAG1 parent assembly)

POWER INPUT SPECIFICATIONS:

• AC Input Voltage: 48 Volts

• Input Frequency: 25 kilohertz

• Input Tolerance: ±10 percent

• Supply Configuration: Single backplane connector with three rows of 32 pins each

POWER OUTPUT SPECIFICATIONS:

• 24 VDC Reference Voltage: Unregulated, 1.5 Amperes maximum

• 12 VDC Reference Voltage: Unregulated, 300 Milliamperes maximum

• Output Configuration: Multiple isolated rails for distributed system power

PROTECTION DEVICES:

• Fuse Rating: 1 Ampere, 250 Volts

• Protection Type: Overcurrent protection for board components

• Fuse Location: Single, field-replaceable device on PCB assembly

PHYSICAL SPECIFICATIONS:

• Mounting Type: Direct backplane insertion via P1 connector

• Connector Type: 96-pin backplane connector (3 rows x 32 pins)

• Factory Configuration: Pre-drilled mounting holes at multiple locations

• Cooling: Passive with integrated heat sinks

STATUS INDICATORS AND TEST POINTS:

• IPOK LED: Input power OK status indication

• MPOK LED: Main power OK status indication

• TP Test Point N15: Analog -15 Volts DC measurement point

• TP Test Point P5: Digital +5 Volts DC measurement point

• TP Test Point P15: Analog +15 Volts DC measurement point

• TP Test Point DCOM: Digital common ground reference point

COMPONENT INVENTORY:

• Transformers: Two units of different sizes for power conversion and distribution

• Heat Sinks: Two units for thermal management of power components

• Memory Device: Serial 1024-bit non-volatile storage

• Inductor Coil: Single unit for current regulation and power conditioning

• Transistors: Multiple units for signal amplification and control

• Capacitors: Various types including high-voltage electrolytic capacitors

• Resistors: Metal film type for precision applications

ENVIRONMENTAL SPECIFICATIONS:

• Operating Temperature: -40°C to +70°C Extended industrial range

• Storage Temperature: -40°C to +85°C

• Relative Humidity: 5% to 95% non-condensing

• Cooling Method: Convection cooling with dedicated heat sinks

REGULATORY COMPLIANCE:

• Reference Manual: GEI-100261

• Series Documentation: GEH-6781 Series Manuals

• System Standard: Mark VI Speedtronic turbine control specifications

FUNCTIONAL FEATURES

Parallel-Style Bus Host Processor Architecture
The IS200RAPAG1B incorporates a feature-rich parallel-style bus host processor specifically engineered for the Innovation Series board rack . This processing architecture enables efficient communication and coordination between the power supply board and all other modules installed in the same chassis. The parallel bus design allows multiple data paths to operate simultaneously, reducing latency in power management responses and enhancing overall system throughput.

Integrated Diagnostic Capabilities
The board provides comprehensive diagnostic functionality through its front panel LED indicators and accessible test points . The IPOK and MPOK indicators give operators immediate visual confirmation of input and main power status. The four TP test points N15, P5, P15, and DCOM enable direct signal measurement using external test equipment, allowing maintenance personnel to perform precise voltage verification, signal analysis, and troubleshooting without removing the board from the rack .

Reset Switch for Manual Intervention
A conveniently accessible reset switch on the front panel allows operators to initiate a board reset process without requiring additional tools or complex procedures . This feature supports rapid recovery from fault conditions and simplifies diagnostic procedures during scheduled maintenance activities. The reset capability is designed for straightforward operation, enabling immediate response to system anomalies.

Serial 1024-Bit Memory Storage
The board incorporates a serial 1024-bit memory device that provides dedicated storage for critical operational data and configuration parameters . This non-volatile memory retains essential information across power cycles, ensuring consistent board behavior during system restarts. The memory device supports efficient data retrieval and storage during normal processing operations.

Comprehensive Thermal Management
Two integrated heat sinks are positioned on the board to dissipate heat generated by power components during normal operation . This thermal management system prevents overheating and maintains stable performance even under demanding operating conditions. The passive cooling design eliminates moving parts, improving long-term reliability in vibration-prone turbine environments.

Transformer-Based Power Conversion
The board features two transformers of different sizes that perform essential power conversion and distribution functions . These components convert incoming 48 Volt 25 kHz AC power to the various DC voltage levels required by different modules within the Mark VI system. The transformer-based design provides inherent electrical isolation between input and output circuits, enhancing system safety and noise immunity.

Overcurrent Protection with Field-Replaceable Fuse
A single 1 Ampere 250 Volt fuse provides protection against overcurrent conditions that could damage board components or downstream modules . The fuse is field-replaceable, allowing maintenance personnel to restore board functionality without replacing the entire assembly. This protection device safeguards both the power supply board and other valuable system components from electrical faults.

Inductor Coil for Power Conditioning
An inductor coil is integrated into the board design for managing electrical currents and ensuring proper power distribution throughout the assembly . This component helps regulate and stabilize the flow of electrical energy, reducing ripple and noise on output voltage rails. The inductor contributes to overall system efficiency and reliability by smoothing power delivery to sensitive control circuits.

Factory-Drillied Installation Points
The board comes pre-drilled at several locations from the factory, facilitating secure installation and proper alignment within the Innovation Series board rack . These mounting points ensure stable mechanical attachment, reducing the risk of vibration-induced connector fatigue in turbine applications. The pre-drilled configuration eliminates the need for field modification during installation.

High-Reliability Component Selection
All components on the IS200RAPAG1B are selected for extended service life in demanding industrial environments . The board includes high-voltage electrolytic capacitors, metal film resistors, and other premium components rated for wide temperature operation. This component selection strategy supports the long mean time between failures required for continuous turbine operation.

APPLICATION SCENARIOS

Gas Turbine Control Systems
The IS200RAPAG1B is extensively deployed in GE gas turbine control applications within the Mark VI Speedtronic series architecture . The board provides stable power distribution to all control modules managing turbine start-up sequencing, fuel flow regulation, combustion monitoring, and exhaust temperature control. The wide operating temperature range supports installation in turbine control cabinets located directly on turbine decks or in separate control rooms.

Steam Turbine Generator Stations
Industrial steam turbine applications including cogeneration facilities, combined cycle power plants, and conventional thermal stations utilize the IS200RAPAG1B for powering turbine control electronics . The board supports excitation control systems, governor control modules, and protection relay interfaces essential for synchronized grid operation. The redundant power supply capability enabled by multiple board configurations ensures continued operation during individual component replacement.

Heavy-Duty Turbine Management
The board is specifically designed for heavy-duty gas and steam turbine systems requiring high-reliability power distribution . In these applications, the board powers vibration monitoring systems, bearing temperature sensors, speed detection circuits, and overspeed protection modules. The robust design withstands the electrical noise and environmental stresses characteristic of large turbine installations.

Power Generation Facilities
Electrical power plants including combined cycle facilities, simple cycle peaking stations, and industrial power houses employ the IS200RAPAG1B in their turbine control systems . The board supplies power to control modules managing generator synchronization, voltage regulation, frequency control, and protective relaying functions. The diagnostic indicators enable quick status verification during plant start-up procedures and routine rounds.

Distributed Control System Integration
The Mark VI system incorporating the IS200RAPAG1B supports distributed control architectures where multiple racks are distributed across large facility footprints . The board powers modules that communicate with remote I/O stations, operator workstations, and plant-wide DCS networks. This distributed capability reduces wiring costs and centralizes control of geographically dispersed equipment.

Triple Modular Redundant Configurations
In critical turbine applications requiring maximum availability, the IS200RAPAG1B is deployed within TMR configurations where three identical control systems operate in parallel . Each rack contains its own power supply board, ensuring that power distribution redundancy matches control system redundancy. This architecture enables continuous turbine operation during maintenance or replacement of individual components.

Industrial Drive Systems
Beyond turbine applications, the Mark VI system and its power supply board are applied to large industrial drives including compressors, pumps, and blowers driven by electric motors or small turbines . The board powers control modules managing acceleration profiles, speed control loops, and protective shutdown sequences. The rugged design suits these demanding industrial environments.

Emergency Power Systems
Emergency generator sets in critical facilities employ the IS200RAPAG1B as part of their control system power architecture . The board supports rapid start capabilities and reliable operation during grid disturbances that activate emergency power systems. The wide temperature range allows deployment in unheated emergency generator enclosures.

SYSTEM INTEGRATION NOTES
The IS200RAPAG1B mounts directly to the Innovation Series board rack through the standard P1 backplane connector . This connector features three rows of 32 pins each, providing both power input and distribution pathways to other rack modules. The board operates as a parallel-style bus host processor, coordinating power delivery with other system components. A complete description of pin connections and detailed signal specifications is available in the associated GEH-6781 Series manuals and GEI-100261 reference guide .

COMPATIBLE COMPONENTS

• Innovation Series Board Rack

• Mark VI I/O modules

• Mark VI Turbine Control modules

• Operator Interface running Windows with CIMPLICITY graphics

• GE Control System Toolbox software

REFERENCE DOCUMENTATION

• GEH-6781 Series Manual

• GEI-100261 Technical Reference

• Mark VI System Documentation Suite

PRODUCT LIFECYCLE STATUS: Legacy – Active in-service. The IS200RAPAG1B remains installed in operational GE Mark VI turbine control systems worldwide. Replacement units and spare parts are available through authorized GE distributors, Emerson Automation channels, and industrial automation aftermarket suppliers .