GE DS200DTBCG1AAA Contact Output Termination Modules

The General Electric DS200DTBCG1AAA, also cataloged as the DS200DTBCG1 Contact Output Termination Module, operates as a dedicated hardware component for relay signal termination and contact output management within Mark V turbine control systems.

Suffix Breakdown & Model Matrix

The DS200DTBCG1AAA identification code provides the following hardware configuration details:

• DS200: Standard Mark V Series assembly type.
• DTBC: Functional product abbreviation (Contact Output Termination Module).
• G1: Group One Mark V Series product grouping.
• AAA: Revision history (A-grade functional, A-grade secondary functional, A-grade artwork configuration).

Hardware Specifications

Process Control Integration and DCS Interface

• Contact Output Logic Execution: The module processes 30 relay outputs. Relays 1-15 are configurable for dry contact or 125 VDC solenoid operation. Relays 16-17 feature integrated fusing for specific solenoid types (e.g., 20CB, 20FD), while relay 18 includes a current-limiting resistor for 20CF solenoids. Relays 19-30 function as dry contacts.
• Backplane and Terminal Interface: The board provides signal routing between the TCRA board (via JS1-JS8 connectors) and the system backplane. It supports high-voltage contact output requirements, allowing for the "wetting" (powering) of solenoid circuits via onboard hardware jumpers.
• Power Signal Management: The assembly integrates J8 (TCPD board power signal) and J15/J16 (125 VDC contact output power) connectors to manage distributed power planes across the Q11 and Q51 control cores.

Frequently Asked Questions

Q: What is the specific role of the JS1-JS8 connector group?

A: The JS1-JS8 connectors are responsible for reading relay signals originating from the TCRA board located in core four. These signals are conditioned and routed to the terminal blocks for field-level distribution.

Q: How is the relay output configuration managed?

A: Relay configuration is performed via onboard hardware jumpers. These jumpers define whether the relay outputs are dry contacts or powered (wetted) for solenoid drive applications, adhering to the specific control requirements of the LM system.

Field Installation Guidelines

• Multi-Source Power Isolation: Before module removal, all power sources must be de-energized. This includes disabling rectifiers (via fuse removal) and opening circuit breakers supplying AC/DC power to the drive. Verify zero energy at all terminal blocks using a calibrated voltmeter before handling the PCB.
• Mechanical Orientation: The module is designed for specific slot placement within the Q11 and Q51 cores. Ensure that the module is correctly aligned with the backplane connectors to prevent pin misalignment or chassis-level short circuits.
• Torque and Termination: All 220 total terminal connections (110 per block) must be verified for secure wire retention. Ensure signal wire insulation is stripped to the proper length to prevent exposed copper while maintaining sufficient contact area within the terminal clamping mechanism.