The GE IS200TBAIH1CDD, also cataloged as the IS200TBAI Analog Input Terminal Board, operates as a dedicated hardware component for analog signal termination within GE Mark VI Speedtronic turbine control system platforms. The card conditions 10 analog inputs and 2 analog outputs across 1-5 VDC input spans and 4-20 mA current loops, fanning field signals across JR1, JS1, and JT1 connectors to connected VAIC analog input modules in simplex or Triple Modular Redundant (TMR) architectures.
| Suffix Component | Functional / Hardware Variant Definition |
|---|---|
| IS200 | Standard base circuit board assembly designator |
| TBAI | VME Analog Input Terminal Board functional acronym |
| H1 | Barrier-type terminal block hardware group level 1 |
| CDD | Revision matrix (C: functional revision, D: artwork iteration, D: component assembly index) |
| Parameter | Specification |
|---|---|
| Model | IS200TBAIH1CDD |
| Brand | GE Boards and Turbine Control |
| Origin | USA |
| Weight | 1.10 kg |
| Dimensions | Standard Mark VI Terminal Board Form Factor |
| Operating Temp | -30 to +65 deg C |
| Power Consumption | Less than 31 W |
| System Platform | GE Mark VI Speedtronic System |
| Interfacing Hardware | GE VAIC Analog Input Module |
| Analog Channel Capacity | 10 Analog Inputs (AI), 2 Analog Outputs (AO) |
| Input Impedance / Span | 1-5 VDC span, 250 Ohms (4-20 mA) / 500 Ohms (+/- 1 mA) |
| Output Load Rating | 500 Ohms load rating (4-20 mA), 50 Ohms (200 mA) |
| Field Power Distribution | +24 VDC current-limited transducer supply (0.2 A per channel) |
The IS200TBAIH1CDD maintains backplane bus communication velocity across control racks to stream continuous 4-20 mA and millivolt input signals directly to system controllers. Firmware flash compatibility across primary processor cores supports synchronized signal sampling. Diode-shared +24 VDC transducer power lines protect against field power dropouts, enabling deterministic network execution and high I/O density scaling throughout turbine control operations.
Q: How does the IS200TBAIH1CDD handle signal distribution in a Triple Modular Redundant (TMR) rack setup?
A: Field input signals connecting to the terminal barrier are fanned to three separate control racks via JR1, JS1, and JT1 cables, while incoming +24 VDC transducer power is diode-shared across all three attached VAIC cards.
Q: What field device output loads are compatible with the two analog output channels on the IS200TBAIH1CDD?
A: The board supports output loop impedances up to 500 Ohms for standard 4-20 mA process loops and up to 50 Ohms for 0-200 mA current drive outputs.
Q: Can multiple IS200TBAIH1CDD terminal boards pair with a single VAIC processor card?
A: Yes. Up to two TBAI termination boards can interface with a single VAIC module, providing physical connections for up to 20 analog inputs and 4 analog outputs.
Mount the IS200TBAIH1CDD vertically onto cabinet mounting rails or standoffs inside the Mark VI control enclosure, ensuring all metal grounding connections make firm contact with the enclosure frame. Land field signal pairs on the barrier terminal strips, taking care to keep low-voltage transmitter wiring physically isolated from AC power circuits. Route shielded twisted-pair drain wires directly to the main system earthing bar at a single point. Verify JR1, JS1, and JT1 cable locking clips are fully latched before turning on system control power.
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