GE IS200TSVCH1AHE Steam Turbine Servo Valve Control Terminal Board
I. Basic Information
Brand: GE Vernova (formerly GE Energy)
Model: IS200TSVCH1AHE, belongs to the TSVCH series (Turbine Servo Valve Control Terminal Board)
System Compatibility: GE Speedtronic Mark VI / Mark VIe generator / turbine control system, used in conjunction with the PSVO servo I/O module, supports the TMR triple redundancy architecture
Position: Servo valve on-site wiring conditioning board, connects the electro-hydraulic servo valve EHSV, LVDT position sensor, and is the front-end interface card for the closed-loop control of fuel valves, inlet guide vanes IGV, and steam regulating valves GCV
Interpretation of Model Suffixes
IS200: Mark VI 6U VME rack I/O board card series
TSVCH: Servo valve control terminal substrate
1A: Hardware major version A
HE: Hardware revision suffix, representing a complete suicide relay (Suicide Relay), improved isolation circuit, compatible with 28VDC backplane power supply, compatible with heavy-duty steam turbines with large stroke LVDT; common suffixes in the same series include AJE/AED/HE, hardware channels are consistent, with subtle differences in internal protection circuits
Specifications of Core Hardware Channels
2 independent servo current output channels (A/B dual loop)
Bidirectional drive output: ±40mA / ±100mA jumpers are selectable
Direct drive EHSV electro-hydraulic servo valve torque motor to achieve valve opening degree regulation closed loop
8 LVDT valve position feedback acquisition
Built-in LVDT excitation source, collecting the linear displacement signal of the regulating valve, and real-time feedback the valve position to the controller
Single-channel dual-redundant LVDT, meeting TMR safety redundant control
2 pulse/frequency input
Connecting speed probes, fuel flow pulse signals, for monitoring turbine speed and fuel metering
Safety circuit
Built-in Suicide Relay fault safety relay, cutting servo output when the board card is abnormal to prevent valve runaway
JD1/JD2 external hard trip terminals, connecting the unit ESD emergency shutdown interlock signal
Terminal blocks
Two sets of 24-bit barrier-type high-current terminal blocks, compatible with 12AWG industrial cables, with shielded grounding terminals, resistant to strong electromagnetic interference
Power supply
J28 interface connects to the backplane 28VDC control power supply
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