GE IS200VSVOH1B VSVO VME‑Bus Servo Control Processor Board,

Description

Hardware & Electrical Specifications

• Model：IS200VSVOH1B
• Part Number：IS200VSVOH1B
• Module Type：VSVO VME‑Bus Servo Control Processor Board
• Mounting：6U single‑slot VME rack backplane installation inside control cabinet
• Power supply：+5 VDC, ±12 VDC powered via VME backplane
• Servo control channels：4 independent electro‑hydraulic servo valve drive channels
• LVDT interface：LVDT excitation output; LVDT position feedback input for valve position measurement
• Servo output：Bidirectional current output for servo valve actuation; built‑in suicide safety relay per channel for fault‑safe shutdown of servo outputs
• Additional inputs：3 pulse‑rate flow measurement input channels for gas turbine fuel flow monitoring
• Processor：TMS320C32 floating‑point DSP for fast closed‑loop control cycle
• Interface：VME backplane bus connector; front‑panel J5 multi‑pin cable connector for TSVO / DSVO terminal board interconnection
• PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, MOV surge suppression, output over‑current / short‑circuit limiting, suicide relay safety cut‑off, LVDT signal fault detection, watchdog self‑monitor circuit
• Compatibility note：Cannot run standalone; must match Mark VI TSVO or DSVO servo terminal boards; full servo‑loop simulation test mandatory after replacement.

Environmental Specifications

• Operating temperature：0 ℃ ~ +60 ℃
• Storage temperature：‑40 ℃ ~ +85 ℃
• Relative humidity：5%‑95% non‑condensing
• Installation location：Indoor turbine control cabinet
• EMC compliance：IEC 61000‑6‑2
• Certifications：CE

Mechanical Data

• Weight：approx 0.70 kg
• Dimension：280 mm × 160 mm × 25 mm
• Handling note：ESD‑sensitive PCB; high‑speed closed‑loop servo control circuit, anti‑static wrist‑strap mandatory during handling

Main Functions

1. Communicate with TSVO terminal board, provide LVDT excitation power and collect valve position feedback signals from LVDT sensors.
2. Execute high‑speed closed‑loop position control algorithm, output bidirectional drive current to electro‑hydraulic servo valves to adjust fuel valve, steam valve and IGV opening.
3. Dedicated suicide relay on each channel cuts off servo drive current under critical board fault condition to realize fail‑safe protection, manual reset required after fault clearance.
4. Receive pulse‑type fuel flow signals, complete flow signal acquisition and processing for turbine fuel‑loop calculation.
5. On‑board self‑diagnosis: detect LVDT open‑circuit / short‑circuit, servo output over‑current, suicide relay status anomaly, VME‑bus communication failure, watchdog timeout; upload fault alarm to turbine main controller.
6. LED status indication:
   • Green LED：Board power supply normal / RUN status
   • Yellow LED：VME‑bus communication active
   • Red LED：Servo‑channel fault / module FAIL alarm

Installation & Wiring Requirements

1. Cut off rack power supply before replacement. Hot‑swap is forbidden. Strict anti‑static protection when handling PCB board.
2. Insert board into designated VME slot, secure panel locking screws; fasten front‑panel J5 cable connector without loose contact.
3. Field servo and LVDT wiring strictly follow GE Speedtronic Mark VI wiring manual; LVDT signal cables adopt high‑quality shielded twisted‑pair, strictly separated from high‑power cables; connect shielding to dedicated ground terminal.
4. Complete protective grounding according to GE Speedtronic system specification.
5. After replacement: verify VME rack power status, check LVDT position reading, perform full stroke valve position closed‑loop test before commissioning.
6. Replacement note: For TMR triple‑redundant system application, hardware consistency of related VSVO boards shall be verified; full servo‑loop simulation test mandatory before unit put‑into‑service.