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This serial communication module enables Modbus connectivity for GE Mark VIe turbine control systems. It provides a gateway between the IONet network and Modbus serial devices in the field. The module supports both Modbus RTU and Modbus ASCII protocols for flexible integration.
Protocol Support and Serial Interfaces
The GE IS220PSCAH1A features two independent serial ports, each configurable for RS-232 or RS-485 operation. Both ports support Modbus RTU, Modbus ASCII, and the GE DACA protocol. The module supports baud rates up to 115.2 kbps for high-speed serial communication. It maps Modbus registers directly to the IONet database for seamless data integration. The module communicates over the PCIe backplane for deterministic, low-latency signal transmission.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | IS220PSCAH1A |
| Product Type | Serial Modbus Communication I/O Module |
| System Compatibility | GE Mark VIe |
| Serial Ports | 2 (independent, configurable) |
| Physical Layers | RS-232, RS-485 |
| Protocols | Modbus RTU, Modbus ASCII, DACA |
| Max Baud Rate | 115.2 kbps |
| Communication | IONet via PCIe backplane |
| Redundancy | TMR (Triple Modular Redundant) |
| Data Mapping | Modbus to IONet database |
| Dimensions | Standard Mark VIe form factor |
| Weight | Approx. 0.3 kg |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Certifications | CE, UL |
IONet Communication and Mark VIe Integration
The module interfaces directly with the Mark VIe controller via the IONet high-speed network. It operates on the PCIe backplane for deterministic, low-latency signal transmission. The TMR design features three redundant processors per serial channel for failsafe operation. This architecture ensures uninterrupted control even during individual processor faults. The module supports hot-swap capability for maintenance without system shutdown. Integration with the Mark VIe Toolbox simplifies configuration.
Application Use
Gas turbines, steam turbines, and industrial generators use this module for serial connectivity. The module connects to distributed I/O, PLCs, and other Modbus serial devices in power plants. It finds applications in vibration monitoring, interface with existing field instrumentation, and remote I/O expansion. Its rugged construction withstands the demanding environments of power generation facilities. The module’s protocol flexibility makes it suitable for integration with various third-party devices.