Description
The GE FANUC IS220PDIAH1B is a Mark VIe Discrete Input I/O Pack designed for GE Speedtronic turbine control systems. It provides the interface between GE Mark VIe controllers and discrete input terminal boards, allowing the system to monitor field contact signals from turbine equipment, sensors, switches, and protection devices.
The PDIA module contains a processor board and acquisition electronics that perform signal conditioning, input processing, diagnostics, and communication through the GE IONet interface. It is widely used in gas turbine, steam turbine, and industrial power control applications requiring reliable digital signal acquisition.
The IS220PDIAH1B supports up to 24 discrete input channels depending on the connected terminal board configuration and provides high-speed event monitoring functions for critical control applications.

IS220PDIAH1B
🔹 Product Parameters Datasheet
| Parameter | Specification |
|---|---|
| Brand | GE FANUC / General Electric |
| Model | IS220PDIAH1B |
| Series | Mark VIe Speedtronic Control System |
| Product Name | Discrete Input I/O Pack |
| Function Type | Digital Input Interface Module |
| Origin / Place of Manufacture | USA |
| Product Status | New Surplus / Tested Used / Refurbished Spare |
| Dimensions | Approx. 292 mm × 130 mm × 27 mm |
| Weight | Approx. 0.2–0.5 kg |
| Power Requirement | 24 VDC Nominal |
| Input Channels | Up to 24 Discrete Inputs |
| Communication Interface | Dual Ethernet IONet Interface |
| Mounting Type | Terminal Board Mounted I/O Pack |
| Discontinued Status | Legacy Product, Available as Replacement Spare |
🔹 Technical Features
🔸 Designed for GE Mark VIe turbine control architecture
🔸 Provides discrete field signal acquisition
🔸 Supports contact input monitoring applications
🔸 Interfaces with GE STCI and compatible terminal boards
🔸 Dual Ethernet communication ports for redundant IONet connections
🔸 Built-in processor and signal acquisition electronics
🔸 Supports diagnostic monitoring and fault detection
🔸 Suitable for gas turbine and steam turbine automation systems
🔸 Supports high-speed input event processing
🔸 Designed for industrial environments requiring high availability
🔹 Common Questions & Answers
Q: What is the main function of GE IS220PDIAH1B?
A: The IS220PDIAH1B collects and processes discrete input signals from field devices and transfers the status information to the Mark VIe turbine controller.
Q: Is IS220PDIAH1B a PLC CPU module?
A: No. It is a dedicated Mark VIe I/O Pack used for digital input signal processing, not a general PLC processor.
Q: How many input channels does this module support?
A: The module supports up to 24 discrete input channels depending on the connected terminal board and system configuration.
Q: Which GE systems use IS220PDIAH1B?
A: It is mainly used in GE Mark VIe and Mark VIeS control systems for turbine and industrial automation applications.
Q: What terminal boards are compatible with this module?
A: The IS220PDIAH1B is designed to operate with compatible GE discrete input terminal boards such as STCI and TBCI series boards.
Q: What should be checked before replacement?
A: Verify the complete model number, terminal board type, firmware compatibility, IONet configuration, cabinet wiring, and application requirements before installation.
Q: What are common failure symptoms?
A: Possible symptoms include missing digital input signals, I/O communication alarms, incorrect field status indication, diagnostic faults, or controller I/O errors.
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