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Help CenterGE IS200EPMCH1 EPMC Card, PCI Mezzanine Card
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GE IS200EPMCH1 (EPMC Card, PCI Mezzanine Card) is a dedicated control module for Speedtronic Mark VI/VIe gas/steam turbines. It serves as a core expansion processing and communication mezzanine card for CPCI controllers, integrating power supply monitoring, Flash-backed SRAM, IONet industrial Ethernet interfaces, and high-precision time synchronization via Ethernet physical-layer packet snooping. It supports dual-redundant or triple-modular redundant (TMR) turbine control architectures, connects to the main processor board at high speed through the PCI 2.2 bus, and provides low-latency data exchange and hardware-level monitoring for unit protection, speed governing, excitation, and sequence control. As a key component for turbine control in demanding industrial scenarios such as thermal power plants, combined-cycle plants, and petrochemical captive power plants, it features industrial-grade wide-temperature operation, vibration and shock resistance, EMC protection, and redundant communication, and can be directly deployed in Class I Div 2 hazardous areas within control cabinets.
I. Product Positioning and Multi-Scenario Adaptability
Dedicated Expansion Core for Mark VI/VIe Turbine Control Systems
Designed specifically for the Speedtronic Mark VI/VIe/VIeS turbine control platform, it is a standard PMC mezzanine card for CPCI controllers. Featuring a modular plug-in design, it can be embedded into the controller mainboard without an additional chassis and supports dual-redundant controller configurations, providing hardware support for the IONet network, power health monitoring, and non-volatile storage of critical data. Its primary purpose is to resolve issues in turbine control such as insufficient time synchronization accuracy, lack of alerts for abnormal power supply, and data loss upon power failure. Communication latency is less than 1 ms, which does not affect the millisecond-level interlock response of overspeed protection and emergency trip systems (ETS).
Adaptability for Industrial Automation System Integration
It is seamlessly compatible with the full range of Mark VI/VIe CPCI main control boards, power supply modules, and I/O subsystems, exchanging data with the processor at high speed via the PCI 2.2 bus. It supports redundant IONet industrial Ethernet communication and can connect to Mark VIe distributed I/O modules (such as the IS200 series I/O), integrating into turbine protection logic without additional gateways. Suitable for installation in CPCI slots of standard 19-inch cabinets, it can directly replace legacy EPMC mezzanine cards without modifying cabinet layout or backplane wiring, significantly reducing system upgrade and expansion costs. It supports sharing unit operating data with DCS systems (e.g., ABB 800xA, Honeywell Experion) via Modbus TCP/EtherNet/IP for uploading to plant-level monitoring platforms.
Adaptability to Harsh Operating Conditions and Explosion-Proof Scenarios
With industrial-grade coating and reinforced printed circuit boards (PCBs), it complies with IEC 61000-6-2/4 EMI/EMC standards and provides vibration resistance (in accordance with IEC 60068-2-6), shock resistance (IEC 60068-2-27), and wide-temperature operation. It withstands high-temperature, high-dust, salt-spray, and strong electromagnetic interference field environments (e.g., high-voltage motor groups, excitation systems). Certified to ATEX and IECEx explosion-proof standards, it is suitable for installation in control cabinets in Class I Div 2 hazardous areas. Electrical isolation between the PCI bus side and the IONet Ethernet side reaches 2500 V AC, effectively suppressing common-mode interference and ground loops to prevent maloperation of control commands.
II. Functions and Technical Advantages
(I) Core Functions
High-Precision Time Synchronization and IONet Communication
Integrates Ethernet physical-layer packet snooping to achieve nanosecond-level time synchronization among modules within the Mark VIe system, meeting the precise timing requirements of turbine speed governing and grid connection. Dual redundant IONet Ethernet ports support automatic link failover (switchover time
Power Supply Monitoring and Hardware-Level Protection
Monitors the 3.3 V/5 V core power and 24 V DC system power of the CPCI controller in real time, immediately reporting and triggering redundant switchover in case of overvoltage/undervoltage/overcurrent. Equipped with surge suppression circuits to withstand power fluctuation impacts inside the cabinet. Hot-swapping is supported (only during non-interlock operation periods, in strict accordance with the “controller standby/offline” procedure in the GE manual), allowing card replacement without system shutdown to improve availability.
Flash-Backed SRAM Data Storage
Built-in Flash-backed static random-access memory (SRAM) stores critical control parameters, event logs, and interlock thresholds in non-volatile areas, with data retention for more than 10 years after power loss. No internal battery is required, avoiding circuit board corrosion from battery leakage and maintenance replacement costs.
Comprehensive Self-Diagnosis and Status Reporting
Diagnostic coverage > 99%, with real-time monitoring of PCI bus communication, IONet link status, power supply voltage, SRAM storage health, and synchronization status. Onboard LED indicators (power, PCI communication, primary IONet, standby IONet, fault) are provided, and fault information is synchronously uploaded to the controller with event timestamps recorded. Combined with ToolboxST software, it enables quick localization of mezzanine card/network/power faults.
(II) Technical Advantages
High Reliability and Fault Tolerance
Modular redundant design, certified to IEC 61508 SIL 3 for functional safety. Constructed with industrial-grade components and subjected to environmental stress screening (ESS) including temperature cycling, vibration, and shock, it achieves industry-leading mean time between failures (MTBF). With no consumable batteries, it supports 24/7 uninterrupted operation to reduce unplanned downtime. IONet redundant communication plus hardware-level power monitoring eliminates single points of failure at the underlying level.
Strong Compatibility and Rapid Integration
Requires no additional drivers and integrates directly into the Mark VI/VIe system via the PCI 2.2 bus. Standard PMC mezzanine card dimensions ensure a perfect fit with PMC slots on CPCI controllers, facilitating cabinet layout and expansion. The configuration process is simple: only IONet addresses, synchronization cycles, and power thresholds need to be set via ToolboxST software, with no complex programming required.
Low-Latency Response and Synchronization Accuracy
PCI bus data transmission latency
Easy Maintenance and Convenient Commissioning
Onboard LEDs provide intuitive indication of mezzanine card and dual-network status. ToolboxST software supports batch parameter configuration, fault query, historical event traceability, and IONet ring network health testing. Calibration of power thresholds and time synchronization accuracy is only required every 12 months without complex calibration equipment, reducing operation and maintenance workload.
III. Application Scenarios
Thermal Power and Combined-Cycle Power Plants
Used for speed governing, overspeed protection, emergency trip system (ETS), and sequential start control of gas/steam turbines. Connects to distributed I/O via IONet to acquire turbine vibration, shaft displacement, temperature, and pressure signals, and drives main steam valves, control valves, and trip relays. Withstands strong electromagnetic interference in power plant electrical distribution rooms and temperature fluctuations inside cabinets, providing early warning of abnormal power supply and automatic switchover to redundant controllers.
Petrochemical and Offshore Platform Captive Power Plants
Controls gas turbines in refineries, chemical plants, and offshore FPSOs. Operates stably under salt-spray, high-humidity, and high-vibration conditions, with IONet redundant communication preventing power plant shutdown due to single-link failures. Class I Div 2 explosion-proof compliance allows deployment in control cabinets near oil and gas areas. Flash-backed SRAM ensures no loss of critical unit parameters after power failure.
Legacy Turbine Control System Upgrade and Retrofit
Can directly replace non-redundant EPMC mezzanine cards or third-party mezzanine cards in early Mark VI systems without modifying cabinet backplanes or controller firmware. Redundant communication, power monitoring, and non-volatile data storage functions are activated simply by completing ToolboxST parameter configuration and IONet network testing, improving the safety integrity and maintainability of the unit control system.
Turbine Control for Nuclear Power Auxiliary Systems
Provides auxiliary control and backup power switchover for steam turbines in the secondary circuit of nuclear power plants. Complies with EMC and environmental test standards for nuclear-grade equipment and features strong resistance to radiation interference. Time synchronization accuracy meets the timing requirements of multi-unit grid connection, and power monitoring prevents power supply anomalies in nuclear island auxiliary systems.
IV. Technical Parameters
| Item | Specification |
|---|---|
| Model | IS200EPMCH1 (GE) |
| Product Type | EPMC Card (PCI Mezzanine Card) dedicated for Mark VI/VIe |
| Interface Standards | PCI Revision 2.2; dual redundant IONet Ethernet ports; PMC slot for CPCI controllers |
| Power Monitoring Range | 3.3 V DC, 5 V DC core power; 24 V DC system power (18–36 V DC wide range) |
| Storage | Flash-backed SRAM, non-volatile data retention > 10 years |
| Time Synchronization | Ethernet physical-layer snooping, synchronization accuracy |
| Communication Latency | PCI bus transmission latency |
| Isolation Level | 2500 V AC electrical isolation between PCI side and IONet side |
| Operating Temperature | -20℃ ~ 60℃ (industrial wide temperature) |
| Relative Humidity | 5% ~ 95% (non-condensing) |
| Ingress Protection | IP20 (for CPCI slot installation in control cabinets only) |
| Mounting | Standard PMC mezzanine slot installation on CPCI controllers |
| Supporting Software | ToolboxST |
| Compatible Systems | Speedtronic Mark VI, Mark VIe, Mark VIeS Turbine Control Systems |
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