Overview
Configured for digital contact input termination in the GE Mark V LM control system, the GE DS200DTBAG1AAA (DS200DTBAG1A Digital Contact Terminal Board) provides direct electrical interface execution between field contact circuits and the TCDA digital I/O board.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DS200DTBAG1AAA |
| Brand | General Electric |
| Origin | USA |
| Product Type | Digital Contact Terminal Board |
| Series | Mark V LM Turbine Control System |
| Function | Digital contact input termination and excitation voltage distribution |
| Weight | 0.36 kg |
| Dimensions | 28.8 x 7.2 x 3.5 cm |
| Power Consumption | Supplied from Mark V LM control system power distribution |
| Contact Inputs | Supports first 46 contact inputs through DTBA connection path |
| Input Isolation | Optical isolation performed on TCDA board |
| Excitation Voltage | Factory configured for 125 VDC or 24 VDC contact input excitation |
| Contact Configuration | Eight-contact input grouping with jumper-based isolation control |
| Mounting Location | Digital I/O core terminal interface position |
Industrial Control I/O Interface and Firmware Compatibility
The DS200DTBAG1AAA operates as a terminal interface component within the GE Mark V LM architecture. The board routes field contact signals to the TCDA digital I/O board, where the CPU processes status changes and assigns event timestamps.
The Mark V LM platform supports firmware flash compatibility across configured control boards. Therefore, the DTBA terminal board works with the designated TCDA hardware configuration without providing independent processing functions.
The board supports I/O density scaling through the Mark V LM digital core design. Additionally, the contact input configuration allows inverted sensing logic for fail-safe contact operation through TCDA I/O configuration settings.
Frequently Asked Questions
Q: What is the primary function of the GE DS200DTBAG1AAA board?
A: The DS200DTBAG1AAA provides termination and distribution for digital contact input signals between field devices and the TCDA digital I/O board in the Mark V LM system.
Q: Does the DS200DTBAG1AAA process digital input signals independently?
A: No. The board provides electrical termination only. The TCDA board performs optical isolation, signal processing, diagnostics, and timestamp generation.
Q: Can the contact input excitation voltage be changed during operation?
A: No. Jumper changes for excitation voltage selection or field ground isolation should be performed only when the turbine control system is not operating.
Field Installation Guidelines
- Install the DS200DTBAG1AAA only in the designated Mark V LM digital I/O core location.
- Verify the factory-configured contact excitation voltage before connecting field wiring.
- Keep digital contact wiring separated from high-voltage power cables to reduce electrical interference.
- Connect cable shields according to the system grounding practice defined for the Mark V control cabinet.
- Inspect terminal connections for correct polarity and secure mechanical fastening before system energization.
- Perform jumper configuration changes only during maintenance conditions with the control system isolated.
- Confirm TCDA diagnostic status after installation to verify correct contact input operation.
