The TPRO security protection terminal board is a safety-critical interface designed for the GE Speedtronic Mark VI turbine control system. It is used in simplex safety logic architectures to monitor key emergency parameters such as turbine overspeed, overtemperature, and overpressure, and to reliably trigger safety shutdown and interlock actions.

The board works in conjunction with Mark VI PPRO I/O modules, providing signal access, conditioning, and isolation for protection-related field signals in gas and steam turbine applications.

Core Functions

Monitoring of critical turbine protection parameters

Emergency condition detection and safety shutdown (trip) interlock triggering

Signal interface and conditioning for PPRO protection I/O modules

Supports emergency stop (ESD) logic in safety circuits

System Compatibility

GE Speedtronic Mark VI Gas / Steam Turbine Control System

Compatible with simplex security logic configurations

Installation & Mechanical Specifications

Installation method: Cabinet panel mounting

System compatibility: Mark VI system I/O rack

Protection level: IP20 (installed inside control cabinet)

Terminal configuration:

Terminal blocks TB1–TB4

Includes voltage transformer (PT) interfaces

Suitable for speed, temperature, and pressure signal wiring

PCB protection: Three-proof conformal coating
(moisture-proof, anti-mold, anti-salt-spray)

Weight: approx. 1.5 kg

Safety Level

Adapted to SIL 2 safety circuits

Supports emergency stop (ESD) and turbine protection logic

Key Technical Parameters

Supported Input Types

Speed signals

Temperature signals

Pressure signals

Voltage transformer (PT) inputs

Associated I/O Module

Compatible with Mark VI PPRO I/O modules, such as:

IS200PPROH1C and equivalent models

Voltage Input (PT)

Compatible with 120 VAC / 240 VAC

Suitable for bus and generator voltage monitoring

Speed Signal Input

Magneto-electric speed sensor input

Frequency range: 0–10 kHz

Temperature Signal Input

Thermocouples: Type K / Type J

RTD / Thermistor: Pt100

Response Performance

Emergency stop response time: ≤ 5 ms

Power Supply

Powered via system backboard 24 V DC logic supply

Isolation & Anti-Interference

Signal and power isolation

Channel-group electrical isolation

High resistance to common-mode interference and electrical noise

Environmental Conditions

Operating temperature: –30 °C to +65 °C

Relative humidity: 5% to 95%, non-condensing

Typical Applications

Turbine overspeed protection

Overtemperature and overpressure protection loops

Emergency shutdown (ESD) systems

GE IS200TDBTH6ACD｜Safety Protection Terminal Board｜