IS215VCMIH1BB Overview

This IS215VCMIH1BB is a VCMI board for the GE Speedtronic Mark VI control system, the VME Communications Interface that acts as bus master for its rack. Every other board in the rack, plus the terminal boards behind them, gets tracked and reported through the VCMI on its way to the UCVE processor.

Slot 1: Why This Card's Position Matters

In a Mark VI rack, the VCMI is installed in the left-most slot, commonly called Slot 1, with the UCVE processor immediately beside it. That position isn't incidental — the VCMI has to see every board in the rack over the backplane, and it's also the only board in the rack with a direct IONet connection out to the VPRO protection boards and to VCMI cards on other cores. If Toolbox or your alarm log references a Slot 1 VCMI alarm, that's this board's position being called out specifically, on any of the <R>, <S> or <T> cores.

Ruling Out Cables, Power and Terminal Boards First

Because the VCMI sits at the center of both the backplane and IONet, a wide range of unrelated problems can surface as a VCMI alarm. Before ordering a replacement card, it's worth checking:

• IONet cabling and BNC connectors for corrosion or a loose connection, and the terminal resistors on the network.
• VME rack power, especially the 5V and 15V supply rails at the card.
• Whether the alarm is actually pointing at a companion VCMI on a different core rather than this one — fault codes for IONet communication failures have been documented to reference the wrong-sounding core, so read the diagnostic detail carefully rather than assuming the obvious card is at fault.
• Whether your board falls in the May 2006 to February 2009 production window covered by GE TIL-1905, which documents a socketed IONet transceiver chip issue that oxidizes over time and produces intermittent communication faults.

In several documented cases, simply powering down, pulling the card, cleaning the card edge and its rack slot, and reseating it cleared a persistent alarm without a replacement being needed at all.

Part Number, Suffix and Revision

IS215 is the Mark VI assembly prefix, VCMI the function, H1 the single-IONet-port design (as opposed to the three-port H2 used in TMR systems), and BB the revision. The revision is printed on the card edge visible when it's seated in the rack, and it needs to match what's configured in Toolbox for that slot. Send a label photo if you want us to confirm before you order.

If You're Also Replacing a VPRO or Other Card

VCMI and VPRO cards are frequently pulled in the same outage since both ride the same IONet. Our GE Speedtronic Part Number Decoder will help you read any other board's part number, and Mark V vs Mark VI: DS200 to IS200 is useful if your site also runs Mark V equipment. The rest of the Mark VI lineup is in our GE Mark VI IS200 Boards collection.

What We Need to Prepare Your Quote

• Full part number and suffix, with revision (IS215VCMIH1BB)
• A photo of the label on the card you're replacing
• Turbine model and Mark VI configuration (simplex or TMR)
• Quantity and how soon you need it

Start Your Quote Request

This IS215VCMIH1BB is used, cleaned and tested, with a 1-year warranty. We quote worldwide with DDP shipping, accept purchase orders, and respond within 24 hours. Click Request a Quote — we don't list prices here, since every quote is built around your board and timeline.

General Information about the Product
Part Number	IS215VCMIH1B Mark VI IS200
Description	IS215VCMIH1B by GE IS215VCMIH1BB VMI Communication Board Mark VI IS215
Condition	used Cleaned and Tested. With 1 Year Warranty.