GE IS200TSVCH2ADC TSVC‑2 Enhanced Servo‑Valve Interface Terminal Board,

Description

Hardware & Electrical Specifications

• Model：IS200TSVCH2ADC
• Part Number：IS200TSVCH2ADC (MRP061873)
• Module Type：TSVC‑2 Enhanced Servo‑Valve Interface Terminal Board
• Mounting：Cabinet panel mounting inside turbine control cabinet
• Logic power supply：24‑28 VDC supplied by PSVO / WSVO servo‑driver pack
• Servo output：4‑channel bi‑directional current output, ±10 mA nominal for electro‑hydraulic servo‑valve coils
• Feedback input：12‑channel LVDT winding inputs for multi‑valve position measurement; 4‑channel pulse‑rate frequency inputs for speed‑related transducers
• LVDT excitation：6‑channel on‑board isolated 7.5 kHz excitation source for position sensors
• Isolation：2500 VAC galvanic isolation between field side and control rack side, suppress plant ground‑loop interference
• Control sampling rate：1 ms closed‑loop servo‑control cycle
• Interface：Removable barrier‑type screw terminal blocks for field servo‑valve, LVDT and pulse‑transducer wiring; multiple multi‑pin ribbon‑cable connectors for PSVO / WSVO servo‑driver interconnection
• PCB treatment：ADC‑revision conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, MOV surge suppression, per‑channel over‑current limiting for servo drive outputs, LVDT open‑/short‑circuit fault detection circuit
• Compatibility note：Cannot run standalone; must match Mark VIe PSVO / WSVO servo‑driver pack; full servo‑loop simulation test mandatory after replacement.

Environmental Specifications

• Operating temperature：‑30 ℃ ~ +65 ℃
• 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 1.25 kg
• Dimension：330.2 mm × 178 mm × 55 mm
• Handling note：ESD‑sensitive PCB; high‑precision analog servo‑circuit, anti‑static wrist‑strap mandatory during handling
• Recommended wire cross‑section：0.75‑2.5 mm² shielded twisted‑pair copper cable for servo‑valve and LVDT position‑sensor wiring
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Removable screw‑terminal field termination for multi‑group electro‑hydraulic servo‑valve coils, LVDT valve‑position feedback sensors and pulse‑rate transducers.
2. Generate multi‑channel high‑frequency excitation signal for LVDT sensors, condition multi‑valve position feedback signals and transmit to PSVO / WSVO servo‑driver pack.
3. Convert digital control commands from servo‑driver pack into bi‑directional analog current drive signals for field servo‑valves, realize multi‑valve closed‑loop position regulation of turbine fuel valves, steam governing valves and IGV actuators.
4. Galvanic isolation between control rack and field devices, suppress turbine‑hall high‑EMI transient interference.
5. On‑board channel self‑diagnosis: detect servo‑drive over‑current, LVDT open‑circuit / short‑circuit fault, ribbon‑cable link failure; upload fault alarm to turbine main controller.
6. LED status indication:
   • Green LED：Board auxiliary power normal
   • Yellow LED：Ribbon‑cable link communication active
   • Red LED：Servo‑channel fault / LVDT sensor fault / link‑failure 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. Secure panel mounting firmly; ensure all multi‑pin ribbon‑cable connectors fully locked without loose contact.
3. Field servo‑valve and LVDT sensor wiring strictly follow GE Speedtronic Mark VIe wiring manual; analog control cables adopt 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 ribbon‑cable link status, check each LVDT position reading, execute full‑range multi‑valve stroke test, validate closed‑loop servo‑regulation performance before commissioning.
6. Replacement note: For TMR triple‑redundant system application, hardware consistency of related servo packs shall be verified; full servo‑loop simulation test mandatory before unit put‑into‑service.