IS200TRLYH1BHH Relay Output Module

Parameter Name
Parameter Value
Product Model
GE IS200TRLYH1BHH
Manufacturer
GE Industrial Systems (Now part of GE Vernova)
Product Type
Relay Output Module
Number of Channels
Typically 4, 8, or 16 Form-C (SPDT) relay outputs (configuration specific)
Contact Rating
5A @ 30V DC or 250V AC (typical for industrial relay modules)
Contact Type
Form-C (SPDT – Single Pole Double Throw)
Coil Voltage
Driven by internal logic (typically 24V DC or 48V DC)
Isolation
1500V AC or higher between coil and contacts, and between channels
Switching Time
< 10 ms
Operational Life
Millions of cycles (mechanical life)
Power Supply
Powered by the Mark VI rack (typically +5V DC for logic and +24V/48V DC for coils)
Status Indicators
LED per channel for relay status (energized/de-energized)
Mounting
Mounts inside the Mark VI rack assembly
Operating Temperature
0°C to +60°C (32°F to +140°F)
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Description

Product Overview

The GE IS200TRLYH1BHH​ is a high-reliability, multi-channel relay output module designed for the GE Mark VI gas and steam turbine control system. This module serves as a critical interface between the digital control logic of the Mark VI controller and high-power field devices, such as solenoid valves, motor starters, alarm annunciators, and auxiliary pumps. The primary function of the GE IS200TRLYH1BHH​ is to receive low-voltage digital command signals from the VCMI (VME Controller Module Industrial) and use its internal electromechanical relays to switch higher-voltage AC or DC circuits that directly control these field actuators. Its role is essential for executing safety shutdown sequences, controlling auxiliary systems, and managing alarms, making it a key component in the overall protection and operational control of the turbine-generator set.
As an integral part of the robust Mark VI system, the GE IS200TRLYH1BHH​ is engineered for maximum reliability in the demanding environment of a power generation facility. The module is designed with a focus on fail-safe operation and long contact life, ensuring that critical commands are executed reliably over thousands of cycles. The value of the GE IS200TRLYH1BHH​ lies in its ability to provide robust, isolated switching for high-power loads, effectively isolating the sensitive low-voltage electronics of the control system from the potentially noisy and high-energy field circuits. This protects the Mark VI controller from voltage transients and electrical noise, thereby enhancing the overall system’s availability and longevity.

Technical Specifications

Parameter Name
Parameter Value
Product Model
GE IS200TRLYH1BHH
Manufacturer
GE Industrial Systems (Now part of GE Vernova)
Product Type
Relay Output Module
Number of Channels
Typically 4, 8, or 16 Form-C (SPDT) relay outputs (configuration specific)
Contact Rating
5A @ 30V DC or 250V AC (typical for industrial relay modules)
Contact Type
Form-C (SPDT – Single Pole Double Throw)
Coil Voltage
Driven by internal logic (typically 24V DC or 48V DC)
Isolation
1500V AC or higher between coil and contacts, and between channels
Switching Time
< 10 ms
Operational Life
Millions of cycles (mechanical life)
Power Supply
Powered by the Mark VI rack (typically +5V DC for logic and +24V/48V DC for coils)
Status Indicators
LED per channel for relay status (energized/de-energized)
Mounting
Mounts inside the Mark VI rack assembly
Operating Temperature
0°C to +60°C (32°F to +140°F)

IS200TRLYH1B

Main Functional Description

The GE IS200TRLYH1BHH​ delivers critical performance through its robust electromechanical relay design and comprehensive status feedback. A core feature is the use of Form-C (SPDT) contacts. This provides a “fail-safe” capability by allowing the module to be wired so that a loss of power to the relay coil (a de-energized state) places the field circuit in a predefined safe condition. For example, a solenoid valve controlling fuel can be wired to close (trip) when the relay de-energizes. The relays provide true galvanic isolation between the control logic and the field load, which is superior to solid-state switches for noise immunity and voltage withstand capability in many high-power switching applications.
Status Monitoring and Diagnostic Capabilities: Each relay channel is typically equipped with an LED indicator that provides immediate visual confirmation of its commanded state (energized or de-energized). This simplifies troubleshooting and allows operators to quickly verify the output of the control system. While the module itself may not have advanced digital diagnostics, its state is ultimately controlled by the Mark VI’s application logic, which can implement software-based diagnostics. For instance, if a command is sent to energize a relay that should start a pump, the logic can monitor a feedback signal (e.g., from a pressure switch or flow meter) to confirm the action was successful. The robust construction of the relays ensures reliable operation under the high vibration conditions that can be present in a power plant.

Application Areas

The GE IS200TRLYH1BHH​ is deployed in power generation facilities utilizing the GE Mark VI turbine control system. Its primary application is for controlling auxiliary systems and executing non-critical sequences within the turbine control cabinet (TCC). This includes starting and stopping lube oil auxiliary pumps, controlling cooling fan motors, operating solenoid valves for hydraulic systems, and energizing alarm horns and warning lights.
Furthermore, the module is used in permissive and interlock circuits. For example, it might be used to enable the starter motor only if the lubrication system is confirmed to be operational. While critical safety functions like the main fuel trip are often handled by dedicated safety relays or the primary output modules of the controller, the IS200TRLYH1BHH​ provides a cost-effective and reliable solution for a wide range of lower-speed, higher-power switching tasks that are essential for the complete automated operation of the turbine and its supporting systems.

Related Products

  • •GE IS200TREAH1A: A related terminal board assembly that provides the interface between the TRLY​ module’s relays and the field wiring.
  • •GE IS200VCMIH2CBE: The VME Controller Module Industrial (VCMI), the main processor that sends commands to the TRLY​ module.
  • •GE IS200AEPCH1ABC: A power supply module that provides power to the Mark VI rack containing the IS200TRLYH1BHH.
  • •GE IS200DIOx: A digital input/output module that handles lower-power, higher-density switching.
  • •GE IS200WREAS1ADB: A speed input module, providing an example of an input module that feeds data to the controller which then commands outputs like the TRLY.

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