Product Overview

The GE IS215UCCAH3A is a UCCA control processor board designed for GE turbine control systems. It is part of the GE Mark VI control platform and is used as the computing core of the UCCx controller architecture.

The board uses a 650 MHz Intel Celeron processor and runs the QNX Neutrino real-time operating system. It provides Ethernet connectivity for the Unit Data Highway (UDH), along with PMC expansion capability and diagnostic interfaces.

For replacement applications, the complete part number and revision should be matched with the existing controller. Similar-looking GE Mark-series boards are not automatically interchangeable.

Key Technical Specifications

Published references identify the processor as a 650 MHz Intel Celeron and describe the board as a single-slot processor board with 10/100 Ethernet, a watchdog timer and two PMC sites.

Main Functions

The IS215UCCAH3A provides the processing resources required by the UCCx controller. Application code runs on the controller processor, while communication interfaces connect the controller with operator, engineering and I/O networks.

The board provides:

• Control application processing
• Unit Data Highway communication
• Ethernet connectivity
• Controller diagnostics
• PMC expansion
• Watchdog monitoring
• Serial service and diagnostic communication

The controller architecture uses Ethernet interfaces for communication with HMIs and other control equipment, while additional network interfaces connect the controller with the Mark VI I/O system.

Communication and Interfaces

The primary Ethernet interface uses an RJ-45 connection and supports 10BaseT/100BaseTX communication with the Unit Data Highway.

The board also includes two micro-miniature 9-pin D connectors. Technical documentation references COM1 for diagnostics, while COM2 is normally not used in the standard configuration.

The exact communication configuration should be verified against the installed UCCx controller and system wiring before replacement.

Installation and Configuration

Before replacing an existing processor board, record the original board number, revision and controller configuration.

1. Shut down the control system according to the plant procedure.
2. Isolate the applicable power supply.
3. Record the existing hardware revision and configuration.
4. Disconnect the communication and interface cables carefully.
5. Remove the existing board from the controller rack.
6. Inspect the backplane and board connectors for contamination or damage.
7. Install the replacement board in the correct slot.
8. Reconnect the Ethernet and serial interfaces.
9. Verify the controller configuration and required jumper settings.
10. Restore power and allow the controller to complete its startup sequence.
11. Check diagnostic LEDs and network communication.
12. Confirm communication with the HMI, engineering workstation and I/O network before returning the system to normal operation.

The UCCx installation arrangement uses a CompactPCI-based controller rack, with the primary controller installed in the designated controller position. Storage configurations can also involve a CMOS battery jumper, so the applicable GE hardware documentation should be followed for the exact revision.

Maintenance

For long-term operation or spare-parts storage, the following checks are recommended.

PCB inspection
Look for corrosion, contamination, cracked components, overheated areas or evidence of previous repair.

Connector inspection
Check the Ethernet, serial and backplane connectors for bent contacts, oxidation or mechanical damage.

Cooling
Make sure the controller rack has adequate airflow. Excessive heat can reduce the service life of processor, memory and power components.

Battery and configuration
If the board has been stored for an extended period, verify the CMOS battery and jumper configuration before installation.

Communication test
After installation, confirm UDH and I/O network communication rather than relying only on a successful power-up.

Typical Applications

The IS215UCCAH3A is intended for GE turbine control environments, including:

• Gas turbine control
• Steam turbine control
• Power generation systems
• Mark VI control cabinets
• Mark VIe control systems
• Turbine-generator control
• Industrial process control
• Legacy turbine control system maintenance

It is particularly useful as a replacement or spare processor board for existing GE Speedtronic control installations.

Replacement Compatibility

When sourcing a replacement, compare the following information:

One important point is that the IS215UCCAH3A should not be described simply as a generic “VME controller card.” Technical references identify it as a single-slot processor/control board for the GE Mark VI family.

Product Condition

The supplied eBay listing currently shows the unit as Seller Refurbished, with the seller note “GOOD CONDITION.” The listing identifies GE as the brand and IS215UCCAH3A as both the model and MPN.

For a refurbished replacement, it is advisable to verify processor startup, Ethernet communication, diagnostic functions and controller recognition before shipment.