Description
GE IS230TNSVH3A | TMR Servo Control Module | Mark VIe Turbine Control
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Model | IS230TNSVH3A |
| System | Mark VIe |
| Assembly Type | Servo Control |
| Redundancy | TMR |
| Terminal Board | IS200TSVCH1A |
| PSVO I/O Packs | 3 |
| WSVO Servo Drivers | 3 |
| Associated Function | Servo valve control |
| Feedback Function | LVDT/servo position feedback |
| Mounting Architecture | DIN-rail I/O assembly |
| Associated I/O Pack | PSVO |
GE’s Mark VIe obsolete-electronics cross-reference specifically identifies IS230TNSVH3A as a TMR Servo Control assembly. It lists IS200TSVCH1A as the included terminal board and identifies PSVO as the impacted I/O pack, with three PSVO I/O packs and three WSVO servo drivers in the TMR configuration.
Product Introduction
The GE IS230TNSVH3A is a Mark VIe TMR servo-control assembly used for turbine actuator and valve-control applications. Unlike a conventional discrete I/O module, its function is centered on the servo-control signal path, combining the TSVCH1A terminal-board hardware with three PSVO I/O packs and three WSVO servo drivers to provide triplicated servo-control channels.
For an operating turbine, the TMR architecture is the important part of the identification. Procurement should therefore match the complete assembly and its associated PSVO/WSVO hardware rather than treating IS230TNSVH3A as a generic replacement I/O card.
IS230TNSVH3A
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
A servo-control spare can look like an ordinary Mark VIe I/O assembly until the turbine control loop is traced from the controller to the terminal board, I/O pack, servo driver, actuator, and position feedback. With IS230TNSVH3A, the TMR architecture means that replacing only one visible component may not restore the intended voting arrangement.
Typical Applications
- Gas turbine fuel-valve servo control
- Steam turbine control-valve actuation
- Electro-hydraulic actuator interfaces
- Turbine valve position feedback
- Mark VIe TMR servo-control systems
Technical Pitfalls
- Do not classify it as a generic digital I/O module. Several secondary listings make this mistake. GE’s component cross-reference identifies specifically as Servo Control, TMR.
- Confirm the terminal-board revision. The documented TMR assembly uses IS200TSVCH1A. A different TSVCH revision should not be accepted solely because the connector arrangement appears similar.
- TMR means three servo paths. The documented assembly contains three PSVO I/O packs and three WSVO servo drivers. A simplex PSVO/WSVO arrangement is not an equivalent TMR assembly.
- Check the complete servo loop. If the turbine reports an actuator-position or servo fault, inspect LVDT feedback, servo-driver wiring, terminal-board connections, I/O Ethernet communication, and actuator condition before condemning the entire assembly.
- Do not use unsupported generic electrical specifications. Online listings give conflicting claims for channel count, voltage, current, dimensions, and environmental ratings. Those figures should not be copied into a procurement specification without the applicable GE hardware manual.
- Verify the installed configuration. Mark VIe turbine applications can use different terminal-board and I/O-pack combinations. The existing system configuration should be compared with the replacement assembly before commissioning.
Related Products
- IS200TSVCH1A — Terminal board used in the documented TMR servo-control assembly.
- IS230TNSVH1A — Simplex version associated with IS200TSVCH1A and one PSVO/WSVO path.
- IS230TNSVH2A — Servo-control configuration associated with IS200TSVCH2A; different terminal-board arrangement.
- IS220PSVOH1B — PSVO servo-control I/O pack used in Mark VIe servo applications.
- IS210WSVOH1A — WSVO servo-driver hardware associated with PSVO servo-control systems.
- IS200TSVCH2A — Alternate TSVCH terminal-board configuration.
- IS230TNPAH2A — PTUR primary turbine-protection I/O pack; protection function rather than servo control.
- IS220PTURH1A — Mark VIe PTUR I/O pack for turbine protection applications.
- IS230TRPAH2A — Primary-trip architecture associated with Mark VI turbine protection.
Procurement Note
For , specify the complete part number and TMR requirement. Before approving a replacement, verify that the installed system uses the documented IS200TSVCH1A + 3 PSVO + 3 WSVO configuration. A listing that describes this part simply as a “digital input/output module” should be treated as insufficient identification.
