Description
1. Product Title
GE IS200EROCH1ABB – Mark VI Exciter Relay Output Card
2. Product Overview
The IS200EROCH1ABB is a specialized Relay Output (EROC) board designed for General Electric’s Mark VI Speedtronic control series, specifically for use within excitation systems like the EX2100. This module provides the critical physical interface required to actuate high-power external devices. Its primary function is to convert low-level logic commands from the control processors into dry contact closures or high-capacity relay outputs used for alarming, tripping, or interlocking sequences.
In a power generation environment, the IS200EROCH1ABB solves the problem of isolation between sensitive digital electronics and high-voltage field equipment. By utilizing heavy-duty electromechanical relays, it ensures that the control system can safely manage breaker trip coils, motor starters, and solenoid valves without the risk of electrical backfeed or noise interference.
3. Technical Specifications
- Brand: General Electric (GE)
- Model: IS200EROCH1ABB
- Warranty: One Year
- Condition: 100% New & Original
- Series: Mark VI Speedtronic (Excitation Subsystem)
- Relay Channels: 6 to 12 configurable relay outputs (depending on system application)
- Contact Rating: Typically 125 VDC at 0.5A or 240 VAC at 2A (resistive)
- Response Time: <10 ms for contact closure
- Isolation: Galvanic isolation between control logic and field contacts
- Mounting: Rack or DIN-rail based on the enclosure configuration
- Operating Temp: -30°C to +65°C (-22°F to +149°F)
4. Key Features & Benefits
- High-Reliability Switching: The IS200EROCH1ABB utilizes industrial-grade relays designed for millions of mechanical operations, ensuring long-term stability in critical trip circuits.
- Status Feedback Monitoring: Each relay output is typically monitored by the board’s internal logic to verify that the contact has physically changed state, providing an extra layer of diagnostic security.
- Configurable Logic: Through the GE Toolbox software, the outputs on the IS200EROCH1ABB can be mapped to specific alarm conditions or protection sequences, such as “Exciter Trip” or “Over-Temperature Warning.”
- Failsafe Design: Supports “De-energize to Trip” or “Energize to Trip” configurations, allowing engineers to define the safest state for the equipment in the event of a power loss to the control board.
5. Application Scenarios
- Generator Breaker Control: Employed to drive the trip and close coils of main generator breakers during synchronization or emergency shutdown procedures.
- Excitation System Alarming: Integrated into GE EX2100 cabinets to provide hardwired alarm signals to the plant’s central Distributed Control System (DCS).
- Auxiliary Equipment Interlocking: Used to enable or disable cooling fans, pumps, or heaters based on the thermal state of the excitation power bridge.
6. Frequently Asked Questions (FAQ)
- Q: What is the primary function of the IS200EROCH1ABB ?
- A: It is a relay output board that provides dry contact interfaces for the Mark VI control system to drive external high-power devices or signal alarms.
- Q: Does the “ABB” suffix indicate the board is made by ABB?
- A: No. In this context, “ABB” is the revision code for the GE-manufactured board, indicating specific hardware and artwork versions.
- Q: Can the relays on the IS200EROCH1ABB be replaced individually?
- A: The relays are typically soldered to the PCB for vibration resistance. If a relay fails, the board is usually replaced or sent for professional component-level repair.
