GE IS200TSVOH1B VME Servo Control Board

GE IS200TSVOH1B VME Servo Control Board

Configured for closed‑loop servo regulation in Mark VI turbine control networks, the GE IS200TSVOH1B (IS200VSVOH1B servo control board) provides direct physical and electrical execution of multi‑channel electro‑hydraulic valve actuation.The board interfaces with TSVO/DSVO terminal boards through VME backplane connectors and processes LVDT excitation, LVDT feedback, servo current drive, and pulse‑rate flow signals across four independent channels.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Flash Compatibility

As a GE Mark VI VME module, the board operates on deterministic backplane bus cycles defined by the controller rack. The J3/J4/J5 connectors provide synchronous data exchange for LVDT feedback, excitation routing, and servo current commands. Firmware‑controlled suicide relays rely on flash‑stored logic blocks; compatibility requires matching firmware revisions between VSVO and associated TSVO/DSVO terminal boards. When the ID device on JR1/JS1/JT1 reports a mismatch, the module enters hardware incompatibility fault state, preventing unsafe execution.

Frequently Asked Questions

Q: Does the IS200TSVOH1B support hot‑swap replacement in a powered VME rack? A: No. The processor rack must be powered down before insertion or removal to avoid backplane bus contention and undefined servo output states.

Q: How does the board manage redundant TMR signal distribution? A: JR1, JS1, and JT1 connectors fan out TMR inputs. The board compares sensor values and removes unhealthy LVDT feedback channels when differential limits are exceeded.

Q: What occurs when a servo suicide relay is activated? A: The relay shorts the output to signal common under firmware control. Manual reset is required before the channel returns to normal operation.

Field Installation Guidelines

• Power down the VME processor rack before handling the board.
• Insert the module using the top and bottom levers to fully seat the edge connectors.
• Tighten captive screws to ensure vibration‑resistant retention.
• Route TSVO/DSVO cable harnesses to J3/J4 using latching connectors; verify mechanical engagement.
• Maintain shield continuity for LVDT wiring and terminate shields at designated grounding points to reduce noise.
• After startup, verify RUN/FAIL/STATUS LED behavior and confirm diagnostic states before enabling turbine operation.