IS215UCVGH1A: The Mark VI VME Controller at the Core of Speedtronic

The IS215UCVGH1A is the main controller of a GE Mark VI Speedtronic gas- or steam-turbine control system. It is the single-board computer that runs the turbine application program: it reads the voted process data, solves the control blocks, and issues the commands that the I/O boards drive out to the machine. The “UCV” family is GE's Innovation Series VME controller, and the G in UCVG marks this particular processor generation.

The board is a single-slot module that mounts in the Mark VI VME rack and communicates with the I/O boards across the VME bus. It does not talk to the field directly; instead it works through the VCMI communication board, which transfers data between the controller's control-system database and the rest of the rack and provides the clock the controller synchronizes to — to within about ±100 microseconds. That relationship matters when you troubleshoot, because a “controller” symptom is often really a VCMI, rack or I/O issue.

Before You Replace the Controller: What Usually Isn't the UCVG

The controller is the most visible board in the rack, so it takes the blame for faults that live elsewhere. Rule these out before you order:

• Configuration and firmware. The UCVG validates its toolbox configuration against the installed hardware every time the rack powers up. A mismatch after a code change or a prior swap looks like a controller fault but is really a load/version problem — check it in the toolbox first.
• The VCMI and the rack. Because all I/O data crosses the VCMI over the VME bus, a VCMI fault, a backplane problem, or a poorly seated board can present as a dead or confused controller. Verify the VCMI and reseat before condemning the UCVG.
• Power and cooling. Confirm the rack power supplies and that the board is getting a clean feed; overtemperature and marginal power cause intermittent resets.
• The other cores. In a triple-redundant (TMR) system, confirm which of <R>, <S> or <T> actually voted out rather than replacing all three controllers.

UCVG Hardware and Documented Specifications

The UCVG is one of the family of 6U single- or double-slot single-board computers that host the Innovation Series controller on the VME bus. For the G generation, the published specifications describe an Intel Ultra Low Voltage Celeron processor at 650 MHz with 128 MB of SDRAM and 128 MB of flash, running the QNX real-time operating system. Two 10BaseT/100BaseTX (RJ-45) Ethernet ports are provided: the first connects to the Unit Data Highway (UDH) for configuration and peer-to-peer traffic, and the second sits on a separate IP subnet for Modbus or a private EGD network. COM1 and COM2 give RS-232C connections for setup and for DCS/Modbus-slave links. Treat these figures as the documented G-generation build and confirm them against your board label, because the UCV generations do not all carry the same processor. GE documents the board in publication GEI-100603A.

Reading IS215UCVGH1A and the H1A Group

The string is the IS215 assembly of the UCVG controller in hardware group H1, with A as the revision. The suffix identifies the exact build/revision to match, so keep the whole string together when you cross-reference. Because a UCVG can directly replace an earlier UCV controller without a backplane change, the important thing is to match the generation and confirm the revision rather than chase an identical trailing letter.

UCVG Versus Other UCV Generations

GE produced the Innovation Series controller in several generations — UCVD, UCVE, UCVG and later — each stepping up processor performance while keeping the same VME form factor and toolbox workflow. A newer controller can generally stand in for an older one in the same rack, which is why sites often consolidate on a single generation of spare. If you are moving from a Mark V system, our Mark V vs Mark VI: DS200 to IS200 guide explains how the DS200 controls map to these IS200/IS215 boards, and you can decode any number with the GE Speedtronic Part Number Decoder. Related controllers and I/O are in our GE Mark VI IS200 Boards collection.

What to Include in Your Quote Request

To quote the right controller quickly, send us:

• The full part number and suffix (IS215UCVGH1A) and the revision on the board label — a photo helps.
• The turbine platform (gas, steam, LM aeroderivative or balance-of-plant) and whether the rack is simplex or TMR.
• The VCMI and any other rack boards you are matching, if relevant.
• Quantity and how urgent the requirement is.

Request a Quote on the IS215UCVGH1A

This IS215UCVGH1A is offered as new surplus in factory packaging with a one-year warranty. Tell us your turbine platform and the revision you are matching and we will confirm availability from stock. Quotes are returned within 24 hours, we ship worldwide DDP, and purchase orders are welcome from qualified operators and EPCs. Use the Request a Quote button to start.

General Information about the Product
Part Number	IS215UCVGH1A Mark VI IS215
Description	IS215UCVGH1A By General Electric PCB VME Controller Card NSFP
Condition	newSurplusFactoryPackage With 1 Year Warranty.