Description
The GE FANUC IS220PAOCH1A is an Analog Output I/O Pack Module designed for the GE Speedtronic Mark VIe turbine control system. It provides the interface between GE turbine controllers and analog field devices by converting digital control commands into precise analog output signals for actuators, valves, and process control equipment.
The IS220PAOCH1A integrates a processor board and an analog acquisition/output board. It supports eight simplex analog current output channels and communicates with Mark VIe controllers through dual Ethernet IONet connections. The module is installed directly onto compatible terminal boards such as TBAO/STAO for distributed turbine control applications.

IS220PAOCH1A
Product Specifications
| Parameter | Description |
|---|---|
| Brand | GE FANUC / General Electric |
| Model | IS220PAOCH1A |
| Series | Speedtronic Mark VIe / Mark VIeS |
| Product Name | Analog Output I/O Pack Module |
| Product Type | Distributed Analog Output Module |
| Function | Converts digital controller commands into analog output signals |
| Analog Output Channels | 8 simplex current output channels |
| Output Signal | 0–20 mA |
| Resolution | 16-bit Digital-to-Analog Converter (DAC) |
| Communication Interface | Dual 10/100 Mbps Ethernet IONet |
| Terminal Board Compatibility | TBAOH1C, STAOH1A |
| Connector Interface | DC-37 pin terminal board connection |
| Power Supply | 24–28 VDC nominal |
| Power Consumption | Approx. 7.5 W maximum |
| Isolation | Galvanic field circuit isolation |
| Mounting Type | Direct terminal board mounted I/O pack |
| Compatible Systems | GE Mark VIe turbine control platform |
| Place of Manufacture / Origin | USA |
| Product Status | Discontinued / Legacy Industrial Spare Part |
| Dimensions | Approx. 8.26 × 4.19 × 12.1 cm |
| Weight | Approx. 0.5 kg |
| Country of Origin | United States |
| Power Requirements | 24 VDC |
Key Features
✅ Original GE Speedtronic Mark VIe I/O Pack module
✅ Eight-channel analog current output capability
✅ High-resolution 16-bit output conversion
✅ Dual Ethernet communication for redundant control networks
✅ Designed for turbine and generator control applications
✅ Supports precise actuator and valve regulation
Applications
• Gas turbine control systems
• Steam turbine automation
• Power generation plants
• Fuel valve and actuator control
• Compressor control systems
• Oil & gas process automation
• GE Mark VIe DCS maintenance and replacement projects
Frequently Asked Questions
❓ Q: What is the GE IS220PAOCH1A used for?
A: The IS220PAOCH1A is an analog output I/O module used in GE Mark VIe turbine control systems to provide analog control signals to field devices.
❓ Q: Is IS220PAOCH1A a PLC CPU module?
A: No. It is a distributed I/O module responsible for analog output processing, not a standalone controller CPU.
❓ Q: How many output channels does IS220PAOCH1A provide?
A: It provides eight simplex analog current output channels for turbine control applications.
❓ Q: Which terminal boards are compatible with IS220PAOCH1A?
A: The module is designed for use with compatible analog output terminal boards including TBAOH1C and STAOH1A.
❓ Q: What systems use the IS220PAOCH1A?
A: It is used in GE Speedtronic Mark VIe and Mark VIeS turbine control systems for distributed I/O applications.
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