GE IS200TSVOH1BCC Servo Valve Terminal Board Product Description

Overview

GE IS200TSVOH1BCC is a TSVO servo valve termination board for the GE Mark VI Speedtronic turbine control system. This GE servo valve terminal board serves as the field interface between electro‑hydraulic servo valves, LVDT position sensors and the matching servo processor card. The GE IS200TSVOH1BCC servo valve terminal board has two independent servo output channels, supporting simplex and TMR triple modular redundant configurations for turbine safety control. This conformal‑coated rack board is widely used for turbine cabinet commissioning, control loop expansion and spare‑part replacement of fuel and steam valve control circuits.

Features

GE IS200TSVOH1BCC servo valve terminal board provides dedicated drive output for hydraulic servo valves and excitation for LVDT/LVDR position feedback sensors. This GE servo valve terminal board supports up to three LVDT sensors per channel for redundant position detection, improving reliability on critical turbine control loops. GE IS200TSVOH1BCC servo valve terminal board integrates signal conditioning circuits and low‑pass filtering to suppress electromagnetic noise in turbine room environments. The GE servo valve terminal board uses conformal coating for protection against moisture and dust. This GE servo valve terminal board adopts standard Mark VI rack form factor and communicates with the servo processor board via the rack backplane for closed‑loop valve position control.

Specs

GE IS200TSVOH1BCC servo valve terminal board

• Brand: GE

• Series: Mark VI Speedtronic IS200

• Model: IS200TSVOH1BCC

• Function: TSVO servo valve termination / LVDT interface board

• Servo channels: 2 independent channels

• Feedback: 1–3 × LVDT/LVDR per channel

• Supported configuration: Simplex / TMR

• PCB coating: Conformal coated

• Mounting: Standard Mark VI rack slot

• Operating temperature: -30°C ~ +70°C

• Application: Electro‑hydraulic servo valve position control

Principle

GE IS200TSVOH1BCC servo valve terminal board receives servo command signals from the Mark VI servo processor board. It converts the command signal into a drive current to control the hydraulic servo valve, adjusting fuel or steam flow. The board supplies excitation voltage to the LVDT sensors, then conditions and returns the position feedback signal to the processor. The control system compares the command position and actual LVDT position, continuously adjusting the servo output to close the position loop. If LVDT signal loss or servo drive fault is detected, the board sends alarm status to the turbine protection logic.

Applications

GE IS200TSVOH1BCC servo valve terminal board is deployed on gas turbines, steam turbines and large centrifugal compressors with GE Mark VI control systems. This GE servo valve terminal board controls fuel valves, governor steam valves and blow‑off valves to regulate unit speed and load. IS200TSVOH1BCC fits power plant turbine control maintenance, servo channel retrofitting and replacement of legacy TSVO termination boards. It is core hardware for turbine governor and fuel control loops.

Installation & Maintenance Notes

Follow official GE Speedtronic turbine control manuals during installation of GE IS200TSVOH1BCC servo valve terminal board. Perform lockout and turbine safety isolation before rack work, as servo loops are directly linked to unit trip protection. Verify LVDT wiring polarity and servo valve wiring; incorrect wiring will cause valve drift or unstable control. Inspect terminal screw torque, conformal coating and connector integrity periodically in high‑temperature turbine cabinet environments. Back up valve tuning parameters before card replacement. Confirm exact part number IS200TSVOH1BCC before spare‑part swap‑out to ensure channel layout, LVDT excitation and compatibility with the existing Mark VI servo processor.