GE DS200TBQAG1A Terminal Board / I/O Interface Module

Description

1. Core Overview & System Context

• Provide secure, high-quality screw terminals for field wiring (from sensors, switches, transmitters, actuators).
• Offer signal conditioning, such as fusing, isolation, or conversion​ for specific signal types.
• Route these conditioned signals via internal connectors or a backplane to the primary control or I/O processing boards (e.g., DS200DCFG, DS200DIOB cards).

2. Key Features & Functions

• Field Wiring Termination:​ Provides robust screw terminal blocks for reliable connection of field device wires, reducing stress on the more delicate connectors of the active control boards.
• Signal Conditioning & Protection (Model Dependent):​ May include:
  • Fuses or Resistors:​ For current limiting on analog or digital inputs.
  • Isolation Barriers:​ Galvanic isolation between field and control sides for noise immunity and safety.
  • Surge Protection:​ Transient voltage suppression for signals in electrically noisy environments.
• Signal Routing:​ Channels multiple field signals to the correct pins of a mating connector that plugs into an active I/O card or the system backplane.
• Status Indication:​ May include LED indicators for specific channels (e.g., power presence, fault status).

3. Common Technical Specifications

• Part Number Breakdown:
  • DS200:​ Drive System 200 series.
  • TBQ:​ Indicates a specific Terminal Board​ model series. «Q» often relates to the board’s function or the type of signals it handles (e.g., specific to certain analog/digital groups).
  • A:​ Hardware revision or variant.
  • G1:​ Generation 1​ hardware.
  • A:​ Final suffix, often indicating a specific configuration or approval variant.
• Form Factor:​ A printed circuit board (PCB) assembly with terminal blocks, designed to mount in a Mark VI I/O pack or terminal enclosure.
• Connections:​ High-density screw terminal blocks on one side, and one or more multi-pin connectors (e.g., DIN type) on the other for connection to the system.
• Compatibility:​ Designed to work in conjunction with specific Mark VI I/O packs​ (e.g., TBCI, TBQC, TBQA frames) and mate with corresponding I/O processor cards.

4. System Integration

• Location:​ Installed within a designated slot of a Mark VI Terminal Board I/O Pack. These packs are distributed around the turbine and connect via network (e.g., PDH, UDH) to the main controllers.
• Role in Signal Chain:
  1. Field Device​ (e.g., thermocouple, pressure switch) wires directly to the terminal block on the DS200TBQAG1A.
  2. The board conditions/protects the signal and routes it internally.
  3. The signal passes via a connector to a daughter card or I/O processor card​ (e.g., a digital input card) housed in the same I/O pack.
  4. The I/O processor card digitizes the signal and communicates it to the Mark VI Controller​ over the control network.
• Maintenance:​ Designed to simplify wiring and maintenance. The terminal board can often be replaced without disturbing the field wiring if the same type is used.

5. Typical Applications

• Analog Input Termination:​ For 4-20mA transmitters (pressure, temperature, flow).
• Digital Input Termination:​ For contact closures from switches (limit switches, pressure switches, pushbuttons).
• Digital Output Termination:​ For signals driving relays, solenoid valves, or indicators.
• Thermocouple/RTD Termination:​ Direct connection of temperature sensors (if equipped with appropriate conditioning).