GE IS200EROCH1ABB

Description

Product Description
The GE IS200EROCH1ABB is a Relay Output Terminal Board, also known as a Contact Output Board, designed for the Mark VI and Mark VIe series Speedtronic turbine control systems by General Electric (GE). This board serves as a critical interface between the digital logic of the turbine controller and high-power field devices, providing isolated, hard-wired relay contacts to command solenoids, motor starters, alarms, and other auxiliary equipment. The primary function of the GE IS200EROCH1ABB is to safely translate low-voltage control signals from the Mark VI(e) I/O network into robust relay contact closures capable of switching higher-voltage AC or DC loads. In a turbine control system, the reliability of output boards like the GE IS200EROCH1ABB is paramount for executing safety sequences, starting lube oil pumps, or activating trip mechanisms. You can access detailed technical data for this output interface board at GE IS200EROCH1ABB. Its design emphasizes electrical isolation and contact reliability to ensure that control commands are executed faithfully in the electrically noisy environment of a power plant. Proper configuration and maintenance of the GE IS200EROCH1ABB are essential for the safe and reliable shutdown and sequencing of turbine auxiliaries.

Product Parameters

• Manufacturer: General Electric (GE).
• System Compatibility: Mark VI and Mark VIe Speedtronic Turbine Control System.
• Board Type: Relay Output Terminal Board.
• Part of Series: IS200 Series I/O packs.
• Output Channels: Provides multiple Form C (SPDT – Single Pole Double Throw) or Form A (SPST-NO) relay output channels. The exact number (e.g., 4, 8, 16) is defined by the specific model.
• Contact Rating: Each relay is rated for a specific voltage and current (e.g., 240 VAC, 2A or 30 VDC, 2A). This defines the maximum load it can switch.
• Control Input: Receives low-voltage command signals (typically 24-30 VDC) from the controller via the internal I/O network.
• Isolation: Provides galvanic isolation between the sensitive control electronics and the field power circuits to prevent noise interference and protect the controller.
• Status Feedback: May include contact status feedback signals to the controller for confirmation of the relay’s state.

Advantages and Key Features

• High Reliability Contacts: Utilizes industrial-grade relays with proven mechanical life (millions of cycles) and electrical ratings suitable for demanding industrial loads.
• Excellent Electrical Isolation: The GE IS200EROCH1ABB provides robust isolation, protecting the delicate Mark VI(e) control circuitry from transients and faults on the field side.
• System-Integrated Design: Engineered for direct compatibility with the Mark VI(e) I/O rack backplane, power supply, and communication protocol, ensuring seamless integration.
• Diagnostic Capability: Relay status feedback allows the control system to perform output verification, a critical feature for safety-related functions.
• Hot-Swappable Design: Typically designed to allow for replacement without requiring a full system shutdown, supporting higher plant availability.

Application Cases in Relevant Fields

• Gas Turbine Auxiliary Sequencing: Controlling lube oil pump motors, hydraulic power unit motors, and fuel gas solenoid valves during startup and shutdown sequences.
• Turbine Protection & Tripping: Actuating final trip solenoids on hydraulic actuators to close steam or fuel valves during an emergency shutdown condition.
• Alarm Annunciation: Driving audible alarms and visual warning lights on the control panel or in the plant.
• Steam Turbine Bypass Systems: Operating isolation and vent valves in turbine bypass systems.

Comparison with Competing Products
Competing products are specific relay output modules within other OEM’s turbine control systems, such as Woodward relay output cards or Siemens T3000 system digital output modules. Compared to standard PLC relay output cards (e.g., from Allen-Bradley or Siemens S7), the GE IS200EROCH1ABB is specialized for the high-reliability, deterministic environment of turbine control. It offers tighter integration with the Mark VI(e) safety and sequencing logic, often with higher-grade isolation and diagnostics tailored for critical machinery protection. Generic PLC cards may be more flexible and cost-effective for general plant use but are not application-optimized for the specific safety and performance requirements of turbine control.

Selection Suggestions and Precautions

1. Exact Part Number Verification: Confirm the part number GE IS200EROCH1ABB against the system’s detailed parts list (DPL) and the label on the failed board. Suffixes are critical for compatibility.
2. Verify Relay Specifications: Check the relay contact configuration (Form C or Form A) and the electrical rating (voltage, current AC/DC) to ensure it matches the load (solenoid, motor starter coil) it needs to control.
3. Assess Load Characteristics: Be cautious of highly inductive loads (like motor coils or solenoid valves). Use appropriate snubber circuits or surge suppressors as specified in the manual to protect the relay contacts from arcing and premature wear.
4. System Configuration: The GE IS200EROCH1ABB must be correctly configured in the Mark VI(e) control software (ToolboxST). The logical points associated with each physical channel must be mapped correctly.