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Help CenterGE IS200TPROH1BCB Protective Termination Board
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GE IS200TPROH1BCB is a Protective Termination Board designed for the Mark VI series turbine control system. As the core interface unit of the system, it handles the connection, conditioning, protection, and distribution of critical monitoring signals, serving as a key bridge connecting field sensors, actuators, and the main control module (VPRO). It provides highly reliable signal paths specifically for safety protection and emergency trip functions of rotating machinery such as gas turbines and steam turbines, and is widely used in safety control scenarios for critical industrial equipment in power generation, petrochemical and other industries.
1. Core Positioning and System Relationship
System AffiliationBelongs to the GE Speedtronic Mark VI series turbine control system with part number IS200TPROH1BCB. It is a dedicated protection signal interface termination board for the system, not an independently operating device, and must work in conjunction with the VPRO protection main controller, TREx relay expansion board, and Mark VI rack.
Core RolePositioned as a safety protection signal interface hub, its core function is to provide physical connection, electrical isolation, surge suppression, signal conditioning, and reliable distribution for critical protection signals including turbine overspeed, vibration, temperature, and pressure. It ensures the integrity and anti-interference capability of the signal chain in the protection system, acting as the first physical barrier for implementing the emergency trip function.
Mounting PositionStandard VME bus specification PCB card, compatible with Mark VI series standard 19-inch racks, with front-plug installation. It communicates with the VPRO controller via the backplane bus. The front panel is equipped with high-density wiring terminals and connectors for direct field cable connection.
System ArchitectureForms a triple redundant protection chain with VPRO (Protection Main Controller) and TREx (Relay Expansion Board):TPRO handles signal input protection → VPRO performs logic diagnosis → TREx drives trip solenoid valves.It meets the API 670 standard for machinery protection systems and supports 1oo2 and 2oo3 redundant voting logic.
2. Core Functions and Technical Features
1. Multi-Type Signal Connection and Protection
Channel CapacityEquipped with 2 groups of large black wiring terminals (24 pins per group, 48 channels total), supporting connection of analog/digital signals including speed, vibration, displacement, temperature (RTD/TC), voltage, and pressure, compatible with 18 AWG standard cables.
Electrical Isolation1500 VDC electrical isolation between channels. Built-in 6 metal oxide varistors (MOVs) and surge suppression circuits effectively suppress lightning strikes, EMI interference, and field surge voltages, protecting the rear VPRO module from overvoltage damage.
Signal ConditioningOnboard 3 groups of precision potentiometers support on-site fine-tuning of signal gain and zero offset, adapting to sensors of different sensitivities and ensuring signal accuracy and matching.
Redundant DistributionSupports 1-input 2-output / 1-input 3-output redundant distribution for critical signals (e.g., speed), synchronously transmitting to multiple VPRO controllers to meet triple redundant voting requirements.
2. Safety Loop and Status Indication
Safety RelaysOnboard 2 groups of high-reliability SPDT safety relays (red body with yellow/black markings on top), directly controlled by VPRO protection logic, providing hardwired output of emergency trip signals. Contact rating: 5A/250VAC, ensuring reliable disconnection of the drive circuit under fault conditions.
Status IndicationEquipped with LED indicators including Power OK (PWR OK), channel fault, and relay actuation, providing real-time feedback of board operating status and enabling rapid on-site diagnostics.
Wire Break MonitoringSupports sensor loop wire break monitoring. Triggers an alarm immediately and locks out protection logic upon abnormal signals to prevent maloperation.
3. Communication and Expansion Capability
Backplane CommunicationPerforms high-speed data interaction with the VPRO main controller via the VME backplane, transmitting raw signals, diagnostic information, and control commands with a communication cycle ≤ 1ms.
Expansion InterfacesThree connectors JZ1/JY1/JX1 on the right side support cascading with TREx relay expansion boards and auxiliary expansion boards to extend trip drive and I/O capabilities.
Power SupplyPowered by the Mark VI rack backplane (18–36 VDC), no external independent power supply required; power consumption ≤ 15W.
3. Technical Specifications
| Category | Details |
|---|---|
| Product Identification | Part number: IS200TPROH1BCB; Model: TPRO; Series: Mark VI IS200 |
| Board Type | Protection Signal Interface Termination Board (PCB) |
| Physical Specification | Dimensions: 278 mm × 212 mm × 55 mm; Weight: approx. 1.34 kg |
| Wiring Terminals | 2 × 24-pin high-density silver metal terminals, compatible with 18 AWG cables |
| Protection Components | 6 × MOVs, 2 × safety relays, multi-channel isolation and filtering circuits |
| Signal Types | Speed, vibration, displacement, RTD/TC temperature, analog, discrete |
| Isolation Voltage | 1500 VDC between channels; electrical isolation between field side and system side |
| Power Parameters | 18–36 VDC (rack backplane power); typical current: 0.4A |
| Environmental Rating | Operating temperature: -30℃ to +65℃; Storage temperature: -40℃ to +85℃; Humidity: 95% non-condensing |
| Country of Origin | United States (USA) |
4. Compatible Systems and Supporting Components
1. Compatible Host Systems
Exclusively compatible with GE Mark VI and Mark VIe series turbine control systems, supports standard VME racks; not applicable to Mark V or other series.
Core Matching Components:VPRO (IS200VPROH1B) Protection Main Controller,TREx (e.g., IS200TREG, IS200TREL) Relay Expansion Board,Mark VI Power Module (IS200TPWRH1B).
2. Supported Sensor Types
Speed Monitoring: Magnetic pickups, eddy current sensors (MPU, Proximitor)
Vibration / Displacement: Bently Nevada 3300 XL series eddy current sensors, velocity sensors
Temperature Monitoring: Type J/K/T/E thermocouples, Pt100/Ni120 RTDs
Process Parameters: 4–20 mA analog signals, dry contact discrete signals
5. Application Scenarios
Power Industry: Overspeed protection, vibration protection, axial displacement monitoring for gas turbines, steam turbines, and generators
Petrochemical Industry: Safety monitoring and emergency trip control for centrifugal compressors, reciprocating compressors, and pump sets
Industrial Power Generation: Critical rotating machinery protection systems for captive power plants and combined cycle power stations
Oil & Gas Transportation: Safety interlock control for long-distance pipeline compressors and station pump sets
Metallurgy / Pulp & Paper: Condition monitoring and protection for large blowers, pulp digesters, and turbines
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