This module is a triple-redundant (TMR) turbine protection board, designed to operate independently of the main turbine control system. It provides high-integrity safety protection functions including emergency overspeed, emergency shutdown, and trip solenoid valve control, meeting the safety and availability requirements of critical turbine units.

Architecture and Reliability

Redundant Structure:

Triple redundancy: R8 / S8 / T8 (original X / Y / Z)

Supports online hot-plug replacement

Designed to eliminate single-point failures and maximize system availability

Core Protection Functions

Emergency Overspeed Protection (EOS)

Emergency Stop (E-Stop)

Trip solenoid valve control

Independent safety logic separate from the main control processor

I/O and Interface Configuration
Signal Inputs

Analog Inputs:

3 × analog current inputs

Typically used for pressure or flow protection

Temperature Inputs:

9 × thermocouple inputs

Used for exhaust temperature and over-temperature protection

Communication

IONet communication port

Status reporting and configuration

Maintains full independence of local trip logic

Communication failures do not inhibit protection actions

Relay Trip Control

Trip Relay Interface: TREG terminal board

Relay Configuration:

12 relays total

9 relays arranged as three groups of 2-out-of-3 (2oo3) voting

Drives three independent trip solenoid valves

Ensures:

Reliable trip execution

Prevention of false trips or failure-to-trip conditions

Power Supply

125 VDC – Trip circuit power

+5 VDC – Core logic power

Supports multi-voltage monitoring for power integrity supervision

Mechanical & Environmental Specifications

Form Factor:

6U VME single-slot board

Dimensions (H × W × D):

233.4 × 160 × 330 mm

Weight:

Approx. 0.45 kg (1 lb)

Operating Temperature:

–30 °C to +65 °C

Terminal Board Compatibility

TPRO – Signal input terminal board

TREG – Trip relay terminal board

TRPG – Power supply negative terminal board

Core Features and Advantages
Independent Safety Protection

Operates as a stand-alone protection system

Provides critical interlocks such as:

Overspeed

Over-temperature

Emergency shutdown

Designed to meet SIL safety level requirements for turbine protection

Voting Logic Control

2oo3 relay voting logic per trip channel

High fault tolerance and operational reliability

Eliminates nuisance trips and missed trip events

Multi-Signal Protection Coverage

Combines:

Process protection (pressure/flow)

Thermal protection (exhaust temperature)

Supports backup and synchronous safety monitoring

High-Availability Maintenance

Triple-redundant architecture allows:

Replacement of a single module online

No impact on turbine operation

Maximizes system uptime and maintainability

GE IS215VPROH2B｜VME Bus Turbine Protection Board｜

Typical Applications

Steam turbines

Gas turbines

Aeroderivative turbine units

Safety-critical turbine protection systems requiring TMR architecture