The IS200ERIOH1A is an Exciter Regulator Input/Output Board designed by General Electric (GE) for its EX2100™ Excitation Control System. This board is the standard version within the ERIO series, primarily used in the EX2100 regulator control system (including both simplex and redundant applications) to provide input and output interfaces between the control system and field devices, as well as internal system components.
The IS200ERIOH1A board plays a critical I/O processing role in the EX2100 regulator control system. It communicates via backplane connectors with various terminal and function boards such as EPCT, ECTB, ERDD, EROC, and ERRR, processing various field input signals and outputting control commands to actuators. An onboard Field Programmable Gate Array (FPGA) controls data acquisition and storage into Dual Port Memory (DPM), which is accessible by the DSPX board via the backplane.
In simplex regulator systems, the IS200ERIOH1A is installed in the Exciter Regulator Backplane (ERBP), providing customer I/O signal interfaces for EPCT and ECTBG2 terminal boards, as well as system I/O signal interfaces for ERDD and EROC. In redundant regulator systems, IS200ERIOH1A boards are installed in both the ERBP (M1) and the Exciter Regulator Redundant Backplane (ERRB, M2/C), providing customer I/O signal interfaces for EPCT and ECTBG1 terminal boards, and system I/O signal interfaces for ERDD, EROC, and ERRR.
Key features of the IS200ERIOH1A board include:
FPGA Control: Uses a Field Programmable Gate Array to control data acquisition and storage.
Dual Port Memory: DPM accessible by the DSPX via the backplane.
Multiple Interface Support: Interfaces with multiple terminal and function boards.
Redundant Architecture Support: Supports both simplex and redundant regulator control systems.
Flexible Configuration: Software-configurable to adapt to different application requirements.
The IS200ERIOH1A board connects to the ERBP or ERRB via backplane connectors, enabling communication with the DSPX processor. The board design meets industrial-grade standards and is suitable for critical control applications in power plant excitation regulator systems.
II. Main Functions
The primary functions of the IS200ERIOH1A include, but are not limited to, the following:
1. Customer I/O Interface
The IS200ERIOH1A board connects to EPCT and ECTB terminal boards via two 25-pin connectors, implementing the following customer I/O interface functions:
Generator Voltage and Current Measurement: Receives generator PT and CT signals via EPCT.
Contact Inputs and Outputs: Receives contact inputs and drives relay outputs via ECTB.
Analog Input: Receives 0-10 V or 4-20 mA analog inputs via EPCT.
2. System I/O Interface
The IS200ERIOH1A board connects via the backplane to internal function boards such as ERDD, EROC, and ERRR, implementing the following system I/O interface functions:
Gate Drive Control: Interfaces with ERDD to provide IGBT gate drive control signals.
Dynamic Discharge Control: Interfaces with ERDD to control the dynamic discharge circuit.
Ground Detector Interface: Interfaces with EROC to support GE or third-party ground detectors.
Redundant Relay Control: Interfaces with ERRR to control redundancy transfer relays.
3. Data Acquisition and Storage
The FPGA on the IS200ERIOH1A board controls data acquisition and storage:
High-Speed Sampling: Acquires input signals at high speed.
Data Storage: Stores acquired data in Dual Port Memory (DPM).
DSPX Access: DPM is accessible by the DSPX board via the backplane for use by control algorithms.
4. Redundant Architecture Support
The IS200ERIOH1A board is designed to support the redundant architecture of the EX2100 regulator control system:
Simplex System: One ERIO installed in ERBP, providing I/O interface for the M1 controller.
Redundant System: One ERIO installed in ERBP (M1) and one in ERRB (M2/C), providing I/O interfaces for all three controllers.
Hot Backup: Supports seamless controller transfer; the system can continue running even if one controller fails.
5. Communication with DSPX
The IS200ERIOH1A board communicates with the DSPX processor board via the backplane:
Control Commands: Receives control commands from DSPX to drive outputs.
Status Feedback: Provides acquired input signal status back to DSPX.
Data Exchange: Enables high-speed data exchange via DPM.
6. Configuration Flexibility
The IS200ERIOH1A board is software-configurable to adapt to different application requirements:
Input Type Configuration: Analog input type (voltage or current) can be configured.
Output Logic Configuration: Relay output logic can be configured.
Interface Protocol Configuration: Interface protocols with various function boards can be configured.
III. System Applications
1. Application in EX2100 Regulator Control System
The IS200ERIOH1A is the core board for I/O signal processing within the EX2100 Regulator Control System. Its roles within the system include:
I/O Data Concentration: Communicates via the backplane with boards such as EPCT, ECTB, ERDD, EROC, and ERRR, concentrating various signals including generator voltage/current, contact inputs, ground detector status, and bridge feedback.
Data Acquisition and Storage: Controls data acquisition via FPGA, storing data in DPM for use by the DSPX processor.
Control Command Output: Receives control commands from DSPX and drives gates, dynamic discharge circuits, and relays via ERDD and ERRR.
System Status Monitoring: Receives status feedback from various function boards for monitoring and protection by the control system.
2. Simplex System Configuration
In a simplex regulator system, one IS200ERIOH1A is installed in the ERBP, providing I/O interface for the M1 controller:
3. Redundant System Configuration
In a redundant regulator system, two IS200ERIOH1A boards are required:
M1 Controller: ERIO installed in ERBP, connected to EPCT and ECTBG1.
M2/C Controller: ERIO installed in ERRB, also connected to EPCT and ECTBG1.
System I/O: Both ERIOs connect to ERDD, EROC, and ERRR via the backplane.
This redundant configuration ensures that I/O functions continue even if one controller fails.
4. Coordination with EPCT and ECTB
The IS200ERIOH1A works closely with EPCT and ECTB terminal boards to implement customer I/O interfaces:
EPCT: Provides generator voltage, current, and analog input signals.
ECTB: Provides contact input and relay output interfaces (G1 version for redundant systems, G2 version for simplex systems).
5. Coordination with ERDD, EROC, and ERRR
The IS200ERIOH1A works with internal function boards to implement system I/O interfaces:
ERDD: Provides IGBT gate drive, dynamic discharge control, and bridge feedback interfaces.
EROC: Provides ground detector interface, keypad support, and terminal board power connection.
ERRR: Provides redundant relay control and bridge feedback interfaces (redundant systems only).
6. Typical Application Scenarios
I/O interface for synchronous generator excitation regulators
EX2100 regulator systems for steam turbine generators
Excitation regulators for hydro turbine generators
Excitation regulator systems for gas turbines
Upgrades and retrofits for industrial excitation systems
IV. Detailed Interface Description
1. Backplane Connector
The IS200ERIOH1A board connects to the ERBP or ERRB via backplane connectors, enabling the following functions:
Communication with DSPX: Exchanges data with the DSPX processor board via the backplane.
System I/O Interface: Connects to internal function boards such as ERDD, EROC, and ERRR via the backplane.
Power Supply: Receives operating power from the EPSM via the backplane.
Refer to ERBP and ERRB related documentation for specific backplane connector pin assignments.
2. EPCT Interface
The IS200ERIOH1A connects to the EPCT terminal board via two 25-pin connectors. These connectors are typically located on the backplane and connect to EPCT via cables. Signals transmitted include:
3. ECTB Interface
The IS200ERIOH1A connects to the ECTB terminal board via two 25-pin connectors. Signals transmitted include:
Contact input signals
Relay drive outputs
Relay status feedback
Depending on whether the system is simplex or redundant, the connected board is either ECTBG2 or ECTBG1.
4. ERDD Interface
The IS200ERIOH1A connects to the ERDD board via the backplane. Signals transmitted include:
IGBT gate drive control signals
Dynamic discharge control signals
DC link voltage feedback
Output shunt current feedback
Output field voltage feedback
Bridge temperature feedback
IGBT gate drive status (power supply and desaturation status)
5. EROC Interface
The IS200ERIOH1A connects to the EROC board via the backplane. Signals transmitted include:
GE ground detector interface signals
Third-party ground detector inputs (ground alarm, ground detector malfunction, diode fault monitor)
Keypad support signals
Terminal board power connection
6. ERRR Interface
In redundant systems, the IS200ERIOH1A connects to the ERRR board via the backplane. Signals transmitted include:
K41 pilot relay drive
KST module transfer relay drive
Module transfer SCR control
Bridge voltage feedback
Bridge current feedback
Bridge overcurrent fault signals
7. Front Panel Interface
The front panel of the IS200ERIOH1A board typically features:
Refer to the actual board and detailed documentation for specific layout and indicator definitions.
V. Configuration and Installation
1. Configuration Method
The IS200ERIOH1A board has no hardware jumpers; all configuration is done via software:
FPGA Configuration: Different FPGA firmware can be loaded to adapt to different I/O interface requirements.
Input Type Configuration: Analog input type (voltage or current) is configured via software.
Output Logic Configuration: Relay output logic is configured via software.
Communication Protocol Configuration: Interface protocols with various function boards are configured via software.
Configuration is typically performed using the GE Control System Toolbox software.
2. Mounting Location
The IS200ERIOH1A board inserts into designated slots in the EX2100 regulator control system backplane:
Simplex System: Inserts into the M1 controller slot in the ERBP.
Redundant System: One board inserts into the M1 controller slot in the ERBP, and another inserts into the M2/C controller slot in the ERRB.
Ensure the board is inserted into the correct slot; incorrect insertion may prevent the control system from functioning properly or damage the board.
3. Installation Steps
Verify Power Off: Ensure the system is completely de-energized.
Open Cabinet Door: Open the control cabinet door.
Insert Board: Align the ERIOH1A board with the correct slot and push it in along the guides.
Seat Board: Using thumbs, firmly press the top and bottom of the faceplate simultaneously to initially seat the board.
Tighten Screws: Alternately tighten the top and bottom faceplate screws evenly to ensure the board is squarely seated.
Connect Cables: If necessary, connect cables to the front panel (typically all ERIO connections are via the backplane, with no external front panel cables).
Restore Power: Close the cabinet door and restore power to the system.
4. Online Replacement
In redundant systems, the IS200ERIOH1A supports online replacement:
Use diagnostic tools to confirm the section (M1 or M2/C) containing the failed board.
Turn off power to the corresponding section on the EPDM.
Verify that all power indicators on boards in that section are off.
Remove the failed board.
Install the new board.
Restore power to the section.
Verify normal operation of the new board using diagnostic tools.
