1. Product Overview

Core Functions

• Controls 4 independent electro-hydraulic servo valves to drive fuel/steam regulation actuators

• Provides LVDT/LVDR linear displacement sensor excitation, valve position feedback acquisition, and closed-loop PID control calculation

• Supports Simplex / Triple Modular Redundant (TMR) configuration, compatible with Mark VI safety control architecture

• Integrates DSP real-time computing, fault diagnosis, status monitoring, supports hot-swap and online maintenance

2. Key Technical Specifications

1. Control & Feedback Specifications

• Servo Channels: 4 independent servo control channels, distributed to 2 TSVO Servo Terminal Boards for output

• Feedback Type: Supports LVDT/LVDR linear displacement sensors, provides sensor excitation power

• Control Algorithm: Built-in closed-loop PID/position loop control, local real-time calculation to reduce system latency

• Redundancy Mode: Supports Simplex and TMR (Triple Modular Redundancy), three-channel voting, eliminates single-point failure risk

• Speed Input: Compatible with active/passive speed sensors, 2Hz~14kHz pulse input

2. Hardware & Communication

• Core Processor: TI TMS320C32 DSP for real-time control computing

• Interfaces: VME backplane bus, J3/J4 connectors (for TSVO terminal boards), 3 status LEDs (RUN Green / FAIL Red / STATUS Orange)

• Power Supply: 24VDC redundant power, power consumption ≤8.5W

• Mounting: Plugs into Mark VI VME processor rack, standard industrial PCB design

3. Environmental & Reliability

• Operating Temperature: 0°C to +60°C; Storage Temperature: -40°C to +85°C

• Protection Rating: IP20 (for installation in control cabinets)

• Certifications: CE, UL, IEC 61010-1 and other industrial safety standards

• Diagnostics: Power-on self-test, real-time monitoring of channel status, communication, power supply; LED status indication and fault alarm output

• Hot-Swappable: Supported, online replacement without system shutdown

3. Key Features & Benefits

1. 4-Channel High-Precision Servo Control: Single board drives 4 electro-hydraulic servo valves, precisely controls fuel/steam flow to meet gas/steam turbine load regulation and speed control requirements.

2. LVDT Closed-Loop Feedback: Integrates sensor excitation, signal conditioning, position acquisition to achieve full closed-loop valve position control with high accuracy, fast response and strong anti-interference.

3. Redundant & Highly Reliable Design: Native compatibility with Mark VI TMR architecture, three-channel voting, fault isolation, hot-swap support to meet continuous operation and zero-downtime overhaul requirements in power plants.

4. Local Real-Time Computing: On-board DSP executes control algorithms locally, reduces communication delay, improves system dynamic response and stability.

5. Comprehensive Diagnostics & Maintenance: Full-channel status monitoring, open-circuit/out-of-tolerance/fault alarm, fast fault location, reduces operation and maintenance costs.

4. Typical Applications

• Gas Turbines: Servo control of fuel control valves, ratio valves, natural gas regulating valves

• Steam Turbines: Closed-loop position control of main steam valves, control valves, extraction valves

• Combined Cycle Power Plants, Industrial Turbine Units: Servo drive and safety protection control for key actuators