DS200FSAAG1ABA Fail-Safe Protection / Shutdown Amplifier Module

Parameter Name	Parameter Value
Product Model	GE DS200FSAAG1ABA
Manufacturer	GE Industrial Systems (Now part of GE Vernova)
Product Type	Fail-Safe Protection / Shutdown Amplifier Module
Target System	GE Mark V Turbine Control System
Primary Function	Interfaces with overspeed protection system and emergency stops to trip the turbine
Input Signals	Accepts signals from magnetic pickups (for speed sensing) and dry contacts from emergency stops
Outputs	Form-C relay outputs to de-energize the turbine trip solenoid valves
Operating Principle	Fail-Safe (Loss of power or module failure causes a trip)
Power Supply	Powered by the Mark V rack backplane and/or external redundant supplies
Status Indicators	LED indicators for power, operational status, and trip condition
Operating Temperature	0°C to +70°C (32°F to +158°F)
Safety Certification	Designed to meet critical protection standards (e.g., API 670 for overspeed protection)

Add to quote

Description

Product Overview

The GE DS200FSAAG1ABA is a high-reliability, fail-safe protection module designed for the GE Mark V gas and steam turbine control system. This module serves as a critical hardware-based safety relay interface, providing a redundant and independent shutdown path for the turbine’s emergency protection functions. The primary function of the GE DS200FSAAG1ABA is to receive trip signals from the turbine’s dedicated protection sensors, such as overspeed detection systems and emergency stop buttons, and to directly de-energize the shutdown circuits that control the turbine’s fuel valves. Its design is fundamentally fail-safe, meaning that any loss of power or internal fault within the module will cause a “trip” condition, ensuring the turbine enters a safe state.

As an integral component of the robust Mark V system, the GE DS200FSAAG1ABA is engineered for maximum reliability and is a cornerstone of the turbine’s overall safety integrity. It operates in parallel with, but independently from, the main control processor, providing a hardware-based backup protection layer. This redundancy is crucial for mitigating the risk of a failure in the primary software-based control system. The value of the GE DS200FSAAG1ABA lies in its ability to provide a highly reliable, last-line-of-defense safety function, protecting the multi-million dollar turbine-generator set from catastrophic damage due to overspeed or other critical faults, thereby ensuring personnel safety and asset protection.

Technical Specifications

Parameter Name	Parameter Value
Product Model	GE DS200FSAAG1ABA
Manufacturer	GE Industrial Systems (Now part of GE Vernova)
Product Type	Fail-Safe Protection / Shutdown Amplifier Module
Target System	GE Mark V Turbine Control System
Primary Function	Interfaces with overspeed protection system and emergency stops to trip the turbine
Input Signals	Accepts signals from magnetic pickups (for speed sensing) and dry contacts from emergency stops
Outputs	Form-C relay outputs to de-energize the turbine trip solenoid valves
Operating Principle	Fail-Safe (Loss of power or module failure causes a trip)
Power Supply	Powered by the Mark V rack backplane and/or external redundant supplies
Status Indicators	LED indicators for power, operational status, and trip condition
Operating Temperature	0°C to +70°C (32°F to +158°F)
Safety Certification	Designed to meet critical protection standards (e.g., API 670 for overspeed protection)

DS200FSAAG1ABA

Main Functional Description

The GE DS200FSAAG1ABA delivers critical safety performance through its dedicated, hardware-based overspeed protection logic. A core function is its independent monitoring of the turbine shaft speed via magnetic pickups. The module processes these signals to determine the rotational speed. If the speed exceeds a pre-set, hardwired overspeed trip setpoint, the module instantaneously activates its trip relays, bypassing the main control processor entirely. This provides a dedicated protection layer against the most dangerous turbine fault.

Redundancy and Diagnostic Capabilities: The GE DS200FSAAG1ABA is typically deployed in a redundant (2-out-of-3 or 2-out-of-2) voting configuration to prevent nuisance trips while maintaining a very high level of safety availability. The module includes self-diagnostics that continuously monitor its internal health and the integrity of the speed sensor inputs. Status LEDs provide clear visual indication of the module’s state, including power, normal operation, and a latched trip state, which is vital for post-trip analysis. The fail-safe design ensures that any internal fault, such as a power supply failure or a component malfunction, will automatically drive the outputs to the trip state, guaranteeing a safe outcome.

Application Areas

The GE DS200FSAAG1ABA is exclusively deployed in power generation facilities utilizing the GE Mark V turbine control system for critical mechanical protection. Its primary and most crucial application is in overspeed protection systems for GE Frame 5, 6, 7, and 9E gas turbines and steam turbines. It acts as the final, independent hardware guard against turbine overspeed, which is the single most critical failure mode for a turbine.

Furthermore, the module is used to interface with emergency shutdown (ESD) pushbuttons located in the turbine hall or at the control room. When activated, these buttons send a signal directly to the FSAAG1ABA module, which then executes an immediate turbine trip. In all these applications, the module is a vital component of the Safety Instrumented System (SIS) for the turbine, responsible for achieving the required Safety Integrity Level (SIL) for the protection functions.