IS200TSVCH1A – GE Mark VIe Servo I/O Terminal Board, TSVC

IS200TSVCH1A – GE Mark VIe Servo I/O Terminal Board

Servo I/O Terminal Board from GE Energy for Mark VIe turbine control systems. Interfaces with electro-hydraulic servo valves. Supports LVDT position feedback and pulse rate inputs. Conformal coated for durability. A-rated functional revision.

Oiltech Controls Review

• This TSVC board provides crucial interfacing for two servo valves in Mark VIe drives.
• Compatible with WSVO servo driver and PSVO I/O pack only – not VSVO processor.
• Supports simplex, dual, and TMR control configurations.
• Internal power supply rated at 28 V DC located at board bottom.
• Two excitation outputs at TB4/3 on the left side.
• Shield bar extends down left side for enhanced noise immunity.

Technical Specifications

• Part Number: IS200TSVCH1A
• Manufacturer: GE Energy / General Electric
• Product Type: Servo I/O Terminal Board (TSVC)
• Series: Mark VIe
• Functional Revision: A
• PCB Coating: Conformal coating
• Assembly Type: Normal Mark VI Series assembly
• Power Supply: 28 V DC internal
• Terminal Blocks: Two blocks, 24 terminals each, #12 AWG
• Dimensions: 33.02 cm x 17.8 cm
• Operating Temperature: -30°C to 65°C

Input Capabilities

• Eight LVDT windings total for valve position feedback.
• Two pulse rate signals – magnetic or TTL type.
• Two additional pulse rate signals for servo output shutdown.
• LVDT excitation: four sources with transformer isolation.
• LVDT excitation: two sources without transformer isolation.
• Two 24 V DC excitation sources for pulse rate transducers.

Output Capabilities

• Bi-directional servo current outputs: 10, 20, 40, 80, or 120 mA.
• Three coils per servo valve.
• Two channels of servo control per board.

Diagnostic Functions

• PSVO monitors servo output current – faults if excessive or unresponsive.
• LVDT feedback signal out-of-range triggers diagnostic alert.
• Dual-sensor systems: bad sensor excluded from feedback calculation.
• L#DIAG PSVO activates if any signal becomes unhealthy.
• ToolboxST displays individual diagnostic details.
• RESET DIA signal latches and resets diagnostic flags.

Configuration & Jumpers

• JP1 sets coil current for servo 1 in simplex systems.
• JP4 sets coil current for servo 2 in simplex systems.
• TMR systems: JP1-3 (servo 1) and JP4-6 (servo 2) select each coil current.
• ToolboxST configures all other servo board parameters.
• JD1 or JD2 terminals connect external trip wiring.

Compatible Equipment

• GE Mark VIe gas, steam, and wind turbine control systems.
• WSVO servo driver modules.
• PSVO I/O packs.
• Electro-hydraulic servo valves with LVDT feedback.
• Systems requiring Speedtronic control technology.

Frequently Asked Questions

• Q: What is the primary function of IS200TSVCH1A?
  It interfaces Mark VIe control systems with electro-hydraulic servo valves, providing LVDT feedback and servo current outputs for turbine valve positioning.
• Q: Is this board compatible with VSVO processors?
  No, TSVC is only compatible with PSVO I/O packs and WSVO servo drivers. VSVO uses different terminal boards.
• Q: What redundancy configurations does this board support?
  It supports simplex, dual, and TMR (triple modular redundancy) control configurations with jumper-selected coil currents.
• Q: How do I select the correct servo coil current?
  Use JP1 (servo 1) and JP4 (servo 2) for simplex. For TMR, use JP1-3 and JP4-6. Current options: 10, 20, 40, 80, or 120 mA.
• Q: What should I check when buying used IS200TSVCH1A?
  Inspect conformal coating integrity, check terminal block condition, verify revision level (A is required), and request functional test reports before purchase.
• Q: How does the board handle LVDT sensor failure?
  In dual-sensor configurations, the system excludes the faulty sensor from feedback calculations and continues operation with the healthy sensor.
• Q: What diagnostic tools work with this board?
  ToolboxST software provides detailed diagnostics. L#DIAG PSVO triggers for unhealthy signals, and RESET DIA clears latched faults.

Why Buy From Oiltech Controls?

• Over 15 years supplying industrial automation spares worldwide.
• Global shipping via FedEx, UPS, and DHL with tracking.
• Tested surplus and refurbished options available.
• 12-month warranty on every product.
• Technical verification performed before each shipment.
• Expert support for obsolete and legacy control systems.

Shipping & Warranty

• Dispatch: 24–28 hours from order confirmation.
• Carriers: FedEx, UPS, DHL – fully tracked and insured.
• Warranty: 12 months against manufacturing defects.
• ESD-safe anti-static packaging for all boards.

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