Description
GE DS200TCTGG1AFF | Simplex Trip Board | Mark V Turbine Shutdown Interface
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE General Electric |
| Part Number | DS200TCTGG1AFF |
| Functional Acronym | TCTG |
| System | Mark V Speedtronic |
| Board Type | Simplex Trip Board |
| Base Board | DS200TCTGG1A |
| Functional Revision | A |
| Secondary Revision | F |
| Artwork Revision | F |
| PCB Coating | Normal |
| Plug-in Relays | 21 |
| 50-pin Connectors | JLX, JLY, JLZ |
| 12-pin Connectors | JM, JN |
| Relay Architecture | Electromechanical plug-in relays |
| Application | Turbine trip / shutdown interface |
The DS200TCTGG1A family is consistently identified as a TCTG Simplex Trip Board, with 21 plug-in relays and three 50-pin plus two 12-pin connectors.
Product Introduction
The GE DS200TCTGG1AFF belongs to the TCTG turbine-trip board family in the GE Mark V Speedtronic control system. Its relay circuitry provides the physical switching interface for trip-related functions, including turbine shutdown and associated interlocks. The board is therefore part of the protection/output path rather than a conventional controller or communications module.
The AFF suffix is important for procurement. Available technical records identify the board as functional revision A, secondary revision F, and artwork revision F. A board carrying only DS200TCTGG1A should not automatically be treated as an exact drop-in replacement without checking its revision and installed wiring.
DS200TCTGG1AFF
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
With an old Mark V trip board, the main risk is not whether the relays energize. The concern is whether the relay allocation, connector wiring, revision, and trip architecture match the turbine’s original protection design.
Typical Applications
- Gas turbine shutdown circuits — Relay switching for turbine trip functions.
- Fuel shutoff control — Interfaces associated with the turbine’s trip/output architecture.
- Protection interlocks — Hardwired relay paths used alongside Mark V control logic.
- Trip and synchronization functions — The TCTG board contains multiple relay circuits serving different Mark V control functions.
Technical Pitfalls to Avoid
- Do not confuse TCTG with TCEB.
DS200TCTGG1AFFis a TCTG Simplex Trip Board.DS200TCEBG1ACE, for example, belongs to the TCEB protective termination family and has a different purpose. - Do not substitute by the first eight characters alone.
TheDS200TCTGG1Abase designation appears across multiple suffixes, includingAECandAFF. The revision information embedded in the complete part number matters. - Document all relay positions before removal.
The board contains 21 plug-in relays. Their physical positions and associated wiring should be recorded before replacement. - Verify every ribbon-cable connection.
JLX, JLY, and JLZ are 50-pin connectors, while JM and JN are 12-pin connectors. A cable moved to the wrong connector can create a serious commissioning problem. - Do not treat the board as a standalone safety controller.
TCTG operates within the larger Mark V protection architecture. The trip logic also involves other Mark V boards and hardwired protection circuits. - Perform a trip-path test after replacement.
A successful power-up does not demonstrate correct turbine protection operation. Relay states, permissives, trip outputs, and the applicable turbine shutdown sequence should be verified according to the site procedure.
Related Products
- DS200TCTGG1A — Base TCTG Simplex Trip Board designation; the functional family from which the
AFFconfiguration is derived. - DS200TCTGG1AEC — TCTG Simplex Trip Board with A/E/C revision combination; not automatically interchangeable with
AFF. - DS200TCTGG1AEE — Alternate TCTG revision/configuration found in Mark V inventory records; verify complete suffix before substitution.
- DS200TCTGG2A — Different TCTG/TC2000 trip-board configuration; do not assume pin compatibility.
- DS200TCTSG1A — Simplex Trip Board associated with another Mark V trip-board family.
- DS200TCEAG1B — TCEA Emergency Overspeed Board; different protection function.
- DS200TCEBG1A — TCEB Protective Termination Expander Board; used for associated protective signal termination.
- DS200TCRAG1A — Mark V relay output board family; general relay-output function differs from the TCTG trip board.
- DS200TCTLG1A — Mark V Large Reheat Board; application differs from the TCTG trip interface.
Procurement Note
For DS200TCTGG1AFF, verify:
complete part number → TCTG family → A/F/F revisions → relay count and positions → JLX/JLY/JLZ wiring → JM/JN wiring → turbine protection architecture → post-replacement trip testing.
One correction worth making in product databases: descriptions such as “simplex jump gate,” “generic relay output card,” or “processor board” are misleading. The stronger identification is GE Mark V TCTG Simplex Trip Board, with relay-based turbine trip functionality.
