Product Overview

The General Electric IS200EROCH1A is an exciter regulator options card. It belongs to the EX2100 series for GE turbine control systems. This board mounts in a single slot of the ERBP or ERRB backplane. You can use the IS200EROCH1A in simplex or redundant regulator configurations. It supports ground detection, keypad interfaces, and tool connections. Moreover, this card provides terminal board power for contact outputs. The board includes a green LED that illuminates when power is applied.

Technical Specifications

The IS200EROCH1A delivers reliable performance in turbine control applications.

General Specifications:

• Part Number: IS200EROCH1A.

• Manufacturer: General Electric.

• Series: EX2100 / Excitation.

• Product Type: Exciter Regulator Options Card (EROC).

• Number of Channels: 24 channels.

• Country of Origin: United States.

• Manual: GEI-100526A.

Physical Specifications:

• Height: 15.9 cm.

• Width: 17.8 cm.

• Operating Temperature: 0 to +45°C.

• Number of Backplane Connectors: Two.

• Number of High-Voltage Electrolytic Capacitors: 4.

Functional Description

The IS200EROCH1A serves multiple critical functions in the EX2100 system.

Core Functions:

• Finds leakage resistances to ground.

• Supports GE and third-party ground detectors.

• Provides keypad interface connectivity.

• Offers tool interface for external computers.

• Supplies terminal board power connection.

• Enables board identification via ID device.

Board Identification Features:

• Includes barcode serial number.

• Stores board type information.

• Contains hardware revision data.

• Interfaces to M1 or M2 control.

Connectors and Interfaces

The IS200EROCH1A features several important connectors on its faceplate.

Keypad Connector:

• Located on the EROC faceplate.

• Another connector exists on the backplane (ERBP or ERRB).

• Transmits keypad data to both locations.

• Supports bezel-mounted keypads.

• Only one keypad can connect at a time.

Tool Connector (9-Pin Plug):

• Interfaces external computer to the DSPX board.

• Supports M1 and M2 control communication.

• Uses RS-232C protocol.

• Baud rate ranges from 1200 to 38.4 K.

ECTB Connector:

• Supplies positive 70 V DC power.

• Powers the contact output section of the IS200ECTB board.

Ground Detection Functions

The IS200EROCH1A supports two ground detector configurations.

GE Simplex Ground Detector:

• Controlled by the M1 DSPX processor.

• Uses ERBP backplane configuration.

• Works with M1 EROC and M1 EPSM.

• Detects leakage resistances in generator field circuits.

GE Redundant Ground Detector:

• Controlled by the M2 DSPX processor.

• Uses ERRB backplane configuration.

• Works with M2 EROC and M2 EPSM.

• Connects 9-pin ground detector cable to EROC in redundant rack.

• No cable connects to the M1 EROC ground detector connector.

Compatibility Information

The IS200EROCH1A works with several related GE boards.

Compatible Backplanes:

• IS200ERBP: Exciter Regulator Backplane (simplex).

• IS200ERRB: Exciter Regulator Redundant Backplane (redundant).

Associated Boards:

• IS200DSPX: Digital Signal Processor Control board.

• IS200ECTB: Exciter Contact Terminal board.

• IS200EPSM: Exciter Power Supply Module.

• IS200ERGTH1A: Connects for resistance leakage detection.

Versions and Groups

Two versions of the EROC board exist. The IS200EROCH1A is the H1 version.

EROC Variants:

• EROCH1 (this model).

• EROCH2 (alternate version).

Refer to the GEI-100526A manual for specific differences between versions.

LED Indicators

The IS200EROCH1A provides clear visual status.

• Green LED: Illuminates when power is applied to the board.

• Located at the top of the faceplate near the GE Energy label.

Installation Guidelines

Install the IS200EROCH1A into a single slot of the ERBP or ERRB backplane. Always cut power before inserting or removing the board. Ensure the board ID device matches your system configuration. For simplex systems, use the ERBP backplane with M1 control. For redundant systems, use the ERRB backplane with M2 control. Connect the keypad to either the faceplate or backplane connector. Use only one keypad connection at a time. Connect the tool connector to an external PC for diagnostics. Verify the operating temperature stays between 0 and +45°C.

What is in the Box

Please inspect all items upon delivery.

• General Electric IS200EROCH1A exciter regulator options card.

• Anti-static protective bag.

• Board ID label with barcode.

Frequently Asked Questions (FAQ)

1. What is the primary function of the IS200EROCH1A?
The IS200EROCH1A detects leakage resistances to ground in generator field circuits. It also supports keypad and tool interfaces for the EX2100 regulator.

2. What is the difference between EROCH1 and EROCH2?
Both are versions of the EROC board. The IS200EROCH1A is the H1 version. Consult manual GEI-100526A for specific functional differences between the two groups.

3. Can I use this board in a redundant system?
Yes. The IS200EROCH1A works in both simplex and redundant configurations. Use the ERRB backplane for redundant applications.

4. How do I know if the board is receiving power?
The green LED on the IS200EROCH1A faceplate illuminates when power is applied. If the LED is off, check your backplane connections.

5. What is the maximum baud rate for the tool connector?
The tool connector supports RS-232C communication. The IS200EROCH1A can operate at baud rates up to 38.4 K.