1. Product Overview

2. Key Hardware Features

• Board Type: TCTG Simplex Trip Board, compatible with Mark V standard control cabinet slots, supports only Simplex architecture (non‑TMR triple‑modular redundancy) for single‑loop safety trip control.

• Interface Configuration: Equipped with 21 plug‑in relays (K1‑K21), 3 × 50‑pin connectors (JLY/JLX/JLZ), 2 × 12‑pin connectors (JN/JM) for connecting field fault monitoring signals and outputting trip commands to actuators (fuel valves, shutdown solenoid valves, etc.), realizing isolated connection between signal input and trip output.

• Signal Processing: Built‑in isolation, filtering, overcurrent/overvoltage protection circuits, providing electrical isolation between input monitoring signals and trip output circuits, suppressing industrial electromagnetic interference, eliminating ground loops, ensuring reliable execution of trip commands and avoiding misoperation or failure to operate.

• Electrical & Environmental: Powered by +5VDC/+24VDC; operating temperature -40°C to +85°C, industrial‑grade wide‑temperature design; PCB with standard industrial conformal coating, anti‑vibration, corrosion‑resistant and EMI‑resistant for harsh power plant environments.

• Maintenance & Diagnosis: 21 plug‑in relays support quick replacement; integrated fault status monitoring, with indicator lights/test ports for locating relay/channel faults, reducing maintenance downtime.

3. Core Functions

1. Fault Signal Acquisition & Monitoring: Receives critical analog/digital fault monitoring signals from the Mark V system, including overspeed, overtemperature, vibration, low oil pressure, flameout, shaft displacement, etc., and judges abnormal unit operating conditions in real‑time.

2. Safety Trip Logic Execution: When any preset fault condition is detected, drives the 21 onboard relays to actuate, outputs hard‑wired trip commands, quickly cuts off fuel, shutdown solenoid valves, main steam valves and other actuators, realizing emergency safety shutdown (Trip) of the unit.

3. Electrical Isolation & Protection: Complete electrical isolation between input signals and trip output circuits, preventing control system damage from field high‑voltage interference and ground potential differences; provides overcurrent and overvoltage protection for relays, improving loop reliability.

4. Trip Status Feedback & Diagnosis: Real‑time feedback of trip circuit and relay status, supports fault diagnosis and event logging, facilitating maintenance personnel to trace trip causes and troubleshoot faults.

5. Simplex Architecture Adaptation: Specially designed for Mark V Simplex control systems, compact structure and cost‑optimized, meeting safety protection requirements for small‑to‑medium units and single‑loop systems.

4. Applications

• Power Industry: Unit safety trip and emergency shutdown protection for Mark V Simplex control systems in combined‑cycle, gas‑fired and steam power plants, compatible with LM series gas turbines and industrial steam turbines.

• Industrial Sector: Safety interlock and emergency shutdown control for heavy‑duty power units and industrial drive equipment in petroleum, chemical and metallurgical industries.

• Scenarios: Spare parts replacement, unit overhaul, control system upgrade and safety protection loop retrofitting for Mark V Simplex systems.