IS215VCMIH2C Communications Board Summary

The IS215VCMIH2CA is a VCMI (VME Communications Interface) board for the GE Speedtronic Mark VI turbine control system, built on a Texas Instruments TMS320C32 digital signal processor with expanded flash memory compared to the earlier H2B generation of the same H2 design. As the bus master for its rack, it manages every I/O board's ID, moves data to the UCVE processor over the VME backplane, and connects the rack to IONet.

Three IONet Ports: Why This Version Exists

The H2 design's defining feature is three IONet 10Base2 ports on one card, each with its own TX/RX/CD indicator LEDs, instead of the single port on the H1 design. That third port is what lets one VCMI design serve all three <R>/<S>/<T> channels of a triple-redundant Mark VI, whether the I/O is local to the control rack or split across remote I/O racks sharing the same IONet backbone.

Before You Buy: Isolate the Fault

Not every VCMI-related alarm points to this card. Before ordering a replacement, work through:

• IONet cabling and BNC connectors — corrosion, looseness, and failed terminal resistors are common causes of communication faults that have nothing to do with the card itself.
• VME rack power at the card, particularly the 5V and 15V supply rails.
• Whether the diagnostic alarm you're seeing is actually attributable to a companion VCMI card on a different core sharing the same IONet — techs troubleshooting this exact board family have found fault codes that point away from the obvious card, so check the core designation carefully in Toolbox or the .m6b file.
• Whether your board's date of manufacture falls between May 2006 and February 2009, the window GE's TIL-1905 covers for a known socketed IONet transceiver chip issue that can look exactly like a hard board failure.

Several documented field cases were resolved simply by powering down, removing the card, cleaning the card and slot, and reseating it — worth doing before assuming the card needs replacing.

What the H2CA Suffix Tells You

IS215 identifies the Mark VI-generation assembly, VCMI the function, H2 the three-port TMR design, C the larger-flash generation of that design, and A the specific revision. Revisions should be matched to your Toolbox configuration rather than assumed compatible — send us a photo of your existing board's label and we'll confirm before you order.

Companion Boards to Check

A VCMI replacement is often part of a bigger job involving VPRO or terminal boards. Our GE Speedtronic Part Number Decoder covers any IS200/IS215 part number you're trying to identify, and Mark V vs Mark VI: DS200 to IS200 is useful if your site runs a mix of Speedtronic generations. The rest of the family is in our GE Mark VI IS200 Boards collection.

Quote Request Checklist

• Full part number and suffix, with revision (IS215VCMIH2CA)
• A photo of the label on the board being replaced
• Turbine model and Mark VI configuration (simplex or TMR)
• Quantity and how urgent the need is

Request a Quote — 24 Hour Turnaround

This IS215VCMIH2CA is used, cleaned and tested, with a 1-year warranty. We quote worldwide with DDP shipping, accept purchase orders, and get quotes back within 24 hours. Click Request a Quote to get started — we keep pricing off the site since every quote is built around your exact board and timeline.

General Information about the Product
Part Number	IS215VCMIH2C Mark VI IS200
Description	IS215VCMIH2C by GE IS215VCMIH2CA VMI Communication Board Mark VI IS215
Condition	used Cleaned and Tested. With 1 Year Warranty.