Open-Box DS200TCTSG1AFE Simplex Trip Board

This DS200TCTSG1AFE is a new-surplus, open-box GE SPEEDTRONIC Mark V Simplex Trip Board (TCTS), cleaned and tested and covered by warranty. The G1AFE revision belongs to the same trip-relay family used across Mark V turbine control panels; open-box new surplus offers essentially unused hardware while keeping the board readily available for an ageing, out-of-production system.

Whatever the packaging, the essentials are the same: this card carries the plug-in relays that feed the turbine's emergency-shutdown circuit, and it must be identified and diagnosed carefully because of where it sits.

The Job of the TCTS in Turbine Protection

The Simplex Trip Board is the relay-output layer of the Mark V trip system. Its relay contacts are wired into the turbine's trip circuit, and its ribbon connectors (JDR, JDS, JDT at 16-pin; JN, JM at 12-pin) tie it back to the control section. It operates within a panel organised around the <R>, <S> and <T> control cores, the common <C> core and the independent protection core <P>. For safety, this page does not cover trip setpoints, voting or test routines — those belong to the GE service manual (GEH-5980 plus your elementary drawings) and your plant's procedure. A helpful overview of the panel is GE Mark V DS200 Boards Explained.

Do Not Swap Blind: Diagnostic Steps

The trip board is a frequent scapegoat because everything in the shutdown chain looks the same from the control room. Confirm the fault before you replace anything:

• Check what commanded the trip. The <I> sequence-of-events and alarm logs reveal whether the control or protection software initiated the shutdown. If so, the board acted correctly.
• Suspect the relay before the board. Individual relays plug in and can be replaced one at a time; a single failed relay easily masquerades as a dead card.
• Walk the field wiring. Trip solenoids, dump valves and interposing circuits are common failure points; verify continuity and their power supply.
• Reseat and inspect. Make sure the JDR/JDS/JDT and JN/JM ribbons are seated and the relay terminal board is sound.

This stays at identification and elimination. Any live testing of the trip function must follow the GE manual and your written site procedure.

From DS200 Prefix to FE Suffix

The part number decodes cleanly: DS200 = Mark V DS200 board series, TCTS = Simplex Trip function, G1 = functional group, A = functional revision, FE = the board's artwork/hardware revision. The two trailing letters are what separate this unit from FA, EE or CC builds of the same G1A card, so always specify the complete string and confirm it against your drawings. See the GE Speedtronic Part Number Decoder for the full logic.

Related Trip, Relay and Next-Generation Boards

In the same corner of the panel you will find the DS200TCTG trip board, the DS200TCTE trip module and the relay terminal boards that land the field wiring. Planning further ahead, the Mark VI (IS200) platform is the modern successor; Mark V vs Mark VI: DS200 to IS200 shows how the trip and I/O roles were re-implemented. Browse current stock under GE Mark V DS200 Boards or the broader GE Speedtronic Turbine Control Boards.

Quote, Lead Time and Terms

For a precise quote, tell us the full part number (DS200TCTSG1AFE), the revision on the board-edge label with a photo, your turbine model, whether the Mark V panel is Simplex or TMR, the quantity and your urgency. We respond within 24 hours, ship worldwide DDP and accept purchase orders. Click Request a Quote and an engineer will confirm availability, condition and lead time.