GE IS200TSVOH1B Mark VI Servo Terminal Board

Description

The IS200TSVOH1B is a specialized servo termination board engineered for the General Electric Mark VI Speedtronic turbine control system. It acts as the physical interface connecting the VSVO I/O processor to two electro-hydraulic servo valves regulating gas or steam turbine fuel and steam valves.

The IS200TSVOH1B terminal board accepts inputs from two bidirectional servo current sources across two independent I/O channels. For precise valve positioning monitoring, it accommodates up to six Linear Variable Differential Transformers (LVDT) or Linear Variable Differential Reluctance (LVDR) feedback sensors, supporting high-select, median-select, or low-select algorithms. The board processes pulse rate input frequencies between 2 Hz and 14 kHz, and connects seamlessly to the VME rack via dedicated cables and plugs for Simplex or Triple Modular Redundant (TMR) control schemes.

Features

• Supports Simplex configurations using JR1 connector and TMR configurations via JR1, JS1, and JT1 connectors.
• Equipped with barrier-type terminal blocks mounted on one long side of the board.
• Accommodates up to six LVDT/LVDR position feedback sensor attachments (three per terminal block).
• Features dedicated external trip inputs via JD1 and JD2 plugs from the protection module.
• Includes jumper-selectable (JP1-6) bidirectional current sources to adapt to various servo coil configurations.
• Integrated shield termination strips connected directly to chassis ground located adjacent to each terminal block.

Applications

• Steam turbine control valve modulation.
• Industrial gas turbine fuel valve regulation.
• Electro-hydraulic actuator interfacing in Mark VI Speedtronic control systems.

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Wiring Capacity: Ensure all field wiring connected to the 24-position terminal blocks does not exceed #12 AWG. Secure the blocks using the two integral retention screws.
• Grounding and Shielding: Terminate cable shields directly at the shield termination strips located to the left of each terminal block to ensure proper chassis grounding and mitigate EMI/RFI noise.
• Coil Configuration: Set jumpers JP1 through JP6 according to the specific bidirectional current requirements of the connected servo valves before powering the loop.
• ESD Protection: Always utilize grounding wrist straps and anti-static mats when handling or unboxing this static-sensitive surface-mount assembly.