About the IS215VPROH2BC VPRO Card
This IS215VPROH2BC is a GE Speedtronic Mark VI VPRO board, one of the three cards that make up a turbine's Emergency Turbine Protection system. Unlike the turbine control processors, VPRO exists for one purpose only: detect an overspeed condition independently and drive the trip solenoids if the turbine needs to shut down. It's built to the H2 design, which supports a single TREG terminal board (the H1 design supports two, through VPRO connector J4).
How VPRO, TPRO and TREG Work Together
The VPRO card itself doesn't touch the trip solenoids directly — it hands that job to the terminal boards. TREG supplies the positive connection to the solenoids, TPRO the negative, and the turbine can be tripped from either terminal board independently. That split between logic (VPRO) and hardwired output (TPRO/TREG) is deliberate: a fault on one side doesn't necessarily disable the other.
Communication-wise, each VPRO channel is powered from its own switch and fuse in the PD (power distribution) core and talks to the rest of the system over IONet, the coax network shared with the VCMI boards in the turbine's control racks. VPRO does not sit on the VME backplane and does not talk directly to the UCVE processor — the VCMI handles that translation.
Field-Proven Diagnostic Steps
Techs working on Mark VI systems have documented several situations where a VPRO-related alarm turned out not to be the VPRO board itself:
- A VPRO board found completely powered down, with no LED activity, has been traced to a blown fuse at its dedicated PD-core switch rather than the board itself — check power first.
- Because VPRO shares IONet with VCMI, a single VPRO fault has triggered VCMI diagnostic alarms across all three control cores at once. Don't treat every simultaneous alarm as a separate board failure.
- Boards manufactured between May 2006 and February 2009 fall under GE TIL-1905, which describes intermittent communication faults caused by an oxidized socketed IONet transceiver chip rather than genuine board failure.
- RF interference, poor grounding, corrosion, and cabinet condensation are all documented, non-board causes of intermittent VPRO and VCMI alarms.
We keep this guidance strictly diagnostic. Trip setpoints, voting logic, and overspeed test procedures are not something we'll improvise here — refer to GEH-6421 and your plant's approved test procedure for any of that.
What Changes Between VPRO Suffixes
IS215 marks the Mark VI assembly family, VPRO the function, H2 the single-TREG design group this board belongs to, and C the specific revision. Revision letters should be matched to your Toolbox configuration and existing hardware rather than swapped casually — send us a photo of your current board's label and we'll confirm before you order.
If You're Also Sourcing VCMI or Other Mark VI Boards
VPRO work rarely happens in isolation. Our GE Speedtronic Part Number Decoder covers how to read any other IS200/IS215 board pulled during the same outage, and Mark V vs Mark VI: DS200 to IS200 is helpful if you're supporting a mixed fleet. See the full lineup under GE Mark VI IS200 Boards.
What to Provide When You Request a Quote
- Full part number and suffix, with revision (IS215VPROH2BC)
- Photo of the board label from the unit being replaced
- Turbine model and Mark VI configuration
- Quantity and urgency
Request a Quote — 24-Hour Response
This IS215VPROH2BC is used, clean 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 exact board, condition, and timeline.
General Information about the Product |
Part Number |
IS215VPROH2B Mark VI IS215 |
Description |
IS215VPROH2B By GE IS215VPROH2BC Protection Module VPro Card Mark VI IS215 |
Condition |
used Clean and Tested. With 1 Year Warranty. |
