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This analog output module drives current loops and voltage signals for GE Mark VIe turbine control systems. It converts digital commands from the controller into precise analog outputs for field actuators. The module provides four independent channels, each configurable for current or voltage operation.
Output Configuration and Signal Ranges
The GE IS220PAOCH1A features four analog output channels, each supporting 4-20 mA current loops and ±10V voltage outputs. Each channel delivers a maximum current of 20 mA with a compliance voltage of 24 VDC. The module provides 14-bit resolution for precise signal generation and control accuracy. The analog outputs connect to the IONet via the PCIe backplane for deterministic communication. Users can configure each channel individually for either current or voltage mode. The module communicates over the triple modular redundant (TMR) IONet backbone.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | IS220PAOCH1A |
| Product Type | Analog Output Module |
| System Compatibility | GE Mark VIe |
| Output Channels | 4 (individually configurable) |
| Current Output Range | 4-20 mA (max 20 mA) |
| Voltage Output Range | ±10V |
| Resolution | 14-bit |
| Compliance Voltage | 24 VDC |
| Communication | IONet via PCIe backplane |
| Redundancy | TMR (Triple Modular Redundant) |
| Output Accuracy | ±0.2% of full scale |
| 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 output 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 precision actuator control. The module drives servo valves, positioners, and other analog-controlled equipment in power plants. It finds applications in fuel control, inlet guide vane positioning, and generator excitation systems. Its rugged construction withstands the demanding environments of power generation facilities.