General Electric IS215VPROH2B VME Protection Assem

GE IS215VPROH2B Mark VI VME Emergency Turbine Protection Module — Triple Redundant, 3-Input, 6-Output

The IS215VPROH2B is a VME Emergency Turbine Protection Module (VPRO) for GE's Mark VI turbine control platform. It provides independent emergency overspeed protection (EOS) separate from the main turbine control system, operating in a triple modular redundant (TMR) configuration with three independent boards (R8, S8, T8). Each board contains its own I/O controller, processor, power supply, and Ethernet communications, allowing any one board to be replaced while the turbine is running without jeopardizing protection.

Key Specifications

• Manufacturer: General Electric / GE Energy
• Series: Mark VI Speedtronic
• Type: VME Emergency Turbine Protection Module
• Inputs: 3 (speed pickup / analog current / thermocouple)
• Outputs: 6 (economizer relay outputs)
• Power Supply: 125 VDC input (range 70–145 VDC); on-board 5 VDC and 28 VDC generation
• Processor: Pentium with 256 KB Level 2 Cache
• Memory: 16 MB DRAM
• Ethernet Interface: Thinwire 10base2 (IONet)
• Baud Rate: 19,200
• COM Ports: 3
• D-Shell Ports: 5
• LED Indicators: 12 (including FLASH LED for memory write status)
• VME Slot Occupation: 2 slots
• Controller Type: VME Controller
• Operating Temperature: 0°C to 45°C (some sources cite -30°C to +65°C)
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 10–95% non-condensing
• Technology: Surface Mount
• Board Dimensions: 33.0 cm H × 17.8 cm W
• Weight: 2.4 kg (5.00 lbs)
• Manual: GEH-6421H
• Redundancy: Triple Modular Redundant (TMR) — R8, S8, T8
• Status: Active / In production

Architecture & Functionality

• Emergency Overspeed Protection (EOS): Primary function using six passive magnetic speed pickups (3 for controllers, 3 for VPROs)
• Backup Synchronization Check: Integrated synchronization logic
• Analog Inputs: 3 analog current inputs
• Thermocouple Inputs: 9 thermocouple inputs (primarily for gas turbine exhaust over-temperature protection)
• Trip Solenoid Control: Controls up to 3 trip solenoids via TREG (positive) and TRPG (negative) terminal boards
• VPROH2 vs VPROH1: VPROH2 is a lower power version that supports only one TREG board. VPROH1 supports two TREG boards (second via J4 connector)
• Communications: IONet Ethernet for test commands and EOS diagnostics monitoring
• VME Interface: Allows programming and testing in VME rack; backplane neutralized when plugged into protection module

Installation Guide

1. Power down the VME I/O processor rack.
2. Slide the IS215VPROH2B into the VME rack, aligning edge connectors.
3. Push top and bottom levers to seat the board fully.
4. Tighten captive screws at top and bottom of front panel.
5. Connect 125 VDC power from cabinet PDM to the power plug.
6. Connect IONet Ethernet for communications with Mark VI controller.
7. Connect J2 power cable and trip solenoid cables to TREG terminal board.
8. For simplex systems, connect J1 trip signal cable to TSVO terminal board.
9. Power on and verify diagnostic LEDs on front panel.

FAQ

Q: What is the difference between IS215VPROH2B and IS215VPROH1B?
A: IS215VPROH2B is a lower power version supporting one TREG board only. IS215VPROH1B supports two TREG boards (second driven from J4 connector). Applications requiring two TREGs must use H1, not H2.

Q: What does the H2B suffix mean?
A: "H2" indicates the lower power VPRO variant. "B" is the B-rated functional revision. Variants H2BD and H2BC are D-level and C-level revisions, all functionally compatible.

Q: Can I replace one VPRO board while the turbine is running?
A: Yes. The TMR design allows any one of the three boards (R8, S8, or T8) to be powered down and replaced without jeopardizing protection.

Q: Is this board compatible with Mark VIe?
A: No. IS215VPROH2B is designed for Mark VI VME-based systems. Mark VIe uses different I/O pack architecture (e.g., IS220PPROH1A).

Q: What are the 12 LEDs for?
A: LEDs indicate power status, communication activity, fault conditions, and FLASH memory write status. Specific LED functions are documented in manual GEH-6421H.

Q: What speed pickups does it support?
A: Six passive magnetic speed pickups or active pulse rate transducers (TTL type). Three monitored by controllers for primary overspeed, three by VPROs for emergency overspeed.

Selection Tips

• Mark VI, single TREG, emergency overspeed: IS215VPROH2B
• Mark VI, dual TREG, emergency overspeed: IS215VPROH1B / IS215VPROH1BD
• Mark VIe protection: IS220PPROH1A (different architecture)
• Always verify: Number of TREG boards required, VME rack slot availability, and IONet connectivity
• Order compatible terminal boards: TREG (positive trip) + TRPG (negative trip) + TPRO (speed/PT inputs)