IS215VPROH1BE at a Glance

The IS215VPROH1BE is a GE Speedtronic Mark VI Emergency Turbine Protection board (VPRO), built to the H1 design that supports two TREG terminal boards per channel rather than one. It's a safety-critical module: its entire purpose is independent overspeed protection, running separately from the turbine's normal speed control logic.

How the VPRO Module Protects the Turbine

Three VPRO boards operate in parallel, each with its own power supply from the PD (power distribution) core and its own path back to the control system over IONet, not the VME backplane used by the rest of the rack's I/O. That IONet traffic reaches the UCVE processor only by way of the VCMI board, which acts as the translator between the protection module and turbine control.

Physically, the VPRO drives trip solenoids through the TREG terminal board (positive connection) and TPRO (negative connection), and either terminal board can initiate a trip. This hardwired arrangement is intentionally kept separate from software logic, part of why the system is considered independent protection rather than just another control function.

Symptoms That Look Like a VPRO Fault (But Aren't)

Before assuming a VPRO card itself needs replacing, it's worth checking a short list of common look-alikes documented by field engineers working on this exact board family:

• A completely dark board (no LEDs) can point to a blown fuse or open switch on the PD-core supply for that channel, rather than a failed VPRO.
• Because VPRO and VCMI ride the same IONet, a single failing VPRO channel has been observed to set off VCMI diagnostic alarms on all three control cores simultaneously — investigate whether the alarms trace to one root cause before ordering three boards.
• GE's TIL-1905 bulletin covers boards built between May 2006 and February 2009 with a socketed IONet transceiver chip that can oxidize and cause intermittent comm faults that look exactly like a bad board.
• Panel-level issues — RF interference, poor grounding, corrosion, humidity — have all been reported as causes of intermittent VPRO-related alarms that clear up without any board replacement at all.

We're intentionally not covering trip setpoints, voting logic, or test procedures here — that belongs in GEH-6421 and your plant's own approved test procedure, not a parts page.

Part Number Breakdown

IS215 is the Mark VI assembly prefix, VPRO the board function, H1 the dual-TREG design group, and E the revision level specific to this unit. Don't assume revisions are interchangeable — if you're not certain E is what your Toolbox configuration expects, send us a label photo of the board you're replacing and we'll confirm before shipping.

Cross-Reference Notes

Working on a VPRO usually means other Mark VI boards are also in play. Check our GE Speedtronic Part Number Decoder for any other IS200/IS215 board you've pulled, and if your site spans older and newer Speedtronic generations, Mark V vs Mark VI: DS200 to IS200 explains how the numbering carries across. The full board range is available under GE Mark VI IS200 Boards.

Quoting This Board

• Full part number and suffix, including revision (IS215VPROH1BE)
• A label photo of the board being replaced
• Turbine model and Mark VI system type (simplex/TMR)
• Quantity and how soon you need it

Worldwide Quote, 24-Hour Turnaround

This IS215VPROH1BE is used, cleaned and tested, and comes with a 1-year warranty. We quote worldwide with DDP delivery, accept POs, and respond within 24 hours. Click Request a Quote to start — pricing is never posted here since each quote is built around your specific configuration and timeline.

General Information about the Product
Part Number	IS215VPROH1B Mark VI IS215
Description	IS215VPROH1B By GE IS215VPROH1BE Emergency Turbine Protection Board MK VI IS215
Condition	used Cleaned and Tested. With 1 Year Warranty.