1. Basic Information

• Model: DS200TCEAG1ACB

• Brand/Series: General Electric (GE) Speedtronic Mark V Gas/Steam Turbine Control System, DS200 Series Emergency Overspeed Board

• Core Role: A critical independent safety protection card for turbine control systems, performing real-time speed monitoring, overspeed detection and emergency shutdown triggering to prevent equipment damage from overspeed

• Standard: Designed for Mark V control racks, independent from main control loops, adopts redundant/2-out-of-3 voting logic, compliant with industrial safety standards

2. Core Hardware & Specifications

• Processor & Communication: Equipped with Intel 80196 microprocessor, communicates with the system via ARCNET/internal bus for independent overspeed monitoring and protection logic

• Signal Input: Accepts multi-channel speed sensor (magnetic/eddy current) signals, supports independent multi-channel acquisition with 2-out-of-3 voting logic to avoid misoperation or failure due to single-point fault

• Output & Indication: Outputs emergency trip/shutdown commands to actuators; on-board LED indicators show power, run, fault and overspeed alarm status

• Power & Environment: Powered by 24VDC/120VAC; operating temperature -40°C~+85°C, conformal coated PCB, vibration and EMI resistant, suitable for harsh power plant conditions

• Physical: Standard PCB card for Mark V cabinet slots, weight approx. 0.98kg, multiple industrial connectors (speed input, trip output, communication, power)

3. Core Functions

• Real-time Speed Monitoring: Independently acquires and processes turbine speed signals, high-precision speed measurement, real-time comparison between actual speed and set threshold

• Overspeed Protection Logic: Pre-set overspeed threshold, millisecond-level fast response when speed exceeds limit, outputs hard-wired trip signal, independently triggers shutdown independent of main control system

• Fault Self-diagnosis: Monitors sensor open/short circuit, power abnormality, channel fault, outputs alarms, supports online diagnosis and maintenance

• Redundant Safety Design: Multi-channel independence, 2-out-of-3 voting, independent power supply/circuit, ensuring high reliability, no misoperation, no failure of protection function

4. Typical Applications

• Emergency overspeed safety protection for gas turbines, steam turbines and combined-cycle units

• Independent safety loop in Mark V turbine control systems, serving as the final overspeed protection line beyond main control

• Safety control for high-speed rotating machinery in oil & gas, power generation and industrial drive fields