The GE IS200TTURH1C, also cataloged as the IS200TTUR Terminal Board, operates as a dedicated hardware component for turbine tripping, sync check, and contact input interfacing within Mark VI Speedtronic control systems. The board manages physical wiring interface channels through screw-mounted terminal blocks, D-shell connectors, and multi-pin plug headers. Integrated onboard relays, center-mounted transformers, variable resistors, and jumper switches enable hardware-level voting and circuit isolation across dual and triple redundant controller configurations.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200TTURH1C |
| Brand | General Electric |
| Origin | USA |
| Weight | 0.82 kg (1.80 lbs) |
| Dimensions | 33.02 cm x 17.78 cm x 5.08 cm |
| Operating Temp | -30 to 65 deg C |
| Power Consumption | Passive board / External power via I/O pack |
| Series | Mark VI |
| Product Type | Turbine Control Terminal Boards |
| Circuit Board Type | Rectangular PCB with minor edge perforations |
| Connectivity | Screw terminal blocks, male/female D-shell connectors, plug connectors |
| Switching & Controls | Surface-mounted relays, variable resistors, jumper switches for voting selection |
| Isolation Transformer | Two center-mounted isolation transformers |
Backplane Bus Communication and Deterministic Networks
The IS200TTURH1C facilitates high-density I/O routing to primary control racks, working in conjunction with PTUR and VTUR I/O processor boards to deliver deterministic signal acquisition across Speedtronic system architectures. Onboard hardware execution isolates field contact circuits from controller backplane bus communication paths, preventing external electrical transients from degrading scan execution. Board-level jumper switches permit physical circuit manipulation to support simplex or two-out-of-three (2oo3) hardware voting topologies without introducing software latency.
Frequently Asked Questions
Q: How are hardware voting configurations selected on the IS200TTURH1C terminal board?
A: Voting modes (simplex or triple redundant voting) are set using onboard physical jumper switches that reconfigure signal routing pathways between field terminal points and interface connectors.
Q: What interface connectors are used to link this board with Mark VI I/O processor boards?
A: The board utilizes numbered two-tier screw terminal blocks for field wiring, alongside male and female D-shell connectors and multi-pin plug connectors for cabling directly to I/O racks.
Q: What function do the center-mounted transformers perform on the board?
A: The two center-mounted isolation transformers provide galvanic voltage scaling and signal conditioning for generator synchronization and AC voltage sensing inputs.
Field Installation Guidelines
- ESD Control Standards: Always utilize a grounded ESD wrist strap attached to the metal panel enclosure prior to handling the terminal board or adjusting jumper positions.
- Jumper Configuration Verification: Verify all physical jumper switch positions match system topology drawings (simplex vs. 2oo3 voting) before powering up connected I/O processor racks.
- Terminal Wiring Torque & Numbering: Route field conductors to the numbered screw terminal blocks and torque connections according to standard panel guidelines to prevent loose terminal high-resistance faults.
- D-Shell Connector Securing: Ensure D-shell interface cables are fully seated and that the threaded connector retention screws are hand-tightened to maintain earth ground continuity and signal integrity.
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