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General Electric DS200TCTSG1A Simplex Trip Board Item NO.: 2907243

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Product Name	General Electric DS200TCTSG1A Simplex Trip Board
Item NO.	2907243
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	GE
Brand	GE
Creation Time	2026-09-10

General Electric

DS200TCTSG1A

Simplex Trip Board

Mark V Speedtronic

Steam Turbine Trip · 12 Relays · ≤10 ms Response

Product Overview

The DS200TCTSG1A is a Simplex Trip Board (TCTS) from GE's Speedtronic Mark V turbine control system. It is designed for steam turbine applications with simplex configurations, providing essential trip functionality to ensure safe and reliable operation.

The board monitors critical operational parameters such as pressure, temperature, and flow. When parameters exceed predefined thresholds, the DS200TCTSG1A initiates a turbine trip to protect against potential damage.

This DS200TCTSG1A is populated with 12 plug-in relays and features three 16-pin connectors (JDR, JDS, JDT) and two 12-pin connectors (JN, JM). The A-rated functional revision may alter performance specifications compared to the original DS200TCTSG1 model.

Technical Specifications

Parameter	Value
Brand	General Electric (GE)
Model	DS200TCTSG1A
Type	Simplex Trip Board (TCTS)
Country	United States
Series	Speedtronic Mark V
Application	Steam Turbine Trip Control
Relay Count	12 plug-in relays
Connectors	3x 16-pin (JDR, JDS, JDT), 2x 12-pin (JN, JM)
Functional Revision	A-rated
PCB Coating	Normal Coating
Board Group	Group 1 (Mark V Series)
Weight	Approx. 3.32 lbs (1.5 kg)
Operating Temperature	-25°C to +70°C

Trip Signal Processing & Logic

How the DS200TCTSG1A Executes Turbine Protection

The DS200TCTSG1A handles the critical steps in the steam turbine’s protection sequence. It houses the electromechanical relays necessary to execute a trip and provides signals that open/close the electrical circuits to the trip block.

Monitors critical parameters: pressure, temperature, flow
Receives 24 V DC switch signals and analog threshold faults
Accepts digital trip commands from LDCC main processor
Signal isolation via optocouplers for reliability

Drives trip relays when parameters exceed setpoints
Independent trip logic not affected by main control program
Response time ≤10 ms for relay actuation
Outputs trip commands to fuel/steam valves for emergency shutdown

Relay Replacement & Maintenance

DS200TCTSG1A Field Service Procedures

The DS200TCTSG1A uses plug-in relays that can be replaced if they stop functioning. Original Mark V Series manual instructions must be followed due to potentially dangerous surface voltages.

Remove power from the drive before any relay replacement
Disconnect cables and remove screws securing the board
Use two hands to carefully remove the board from the drive

Wire retention clips snap off the bottom of the connector
Swing the retention wire over the relay to lock it under the connector
Static-sensitive PCB requires anti-static packaging during shipping

FAQ

Our DS200TCTSG1A stopped working during a turbine run and we need a replacement urgently. How do we confirm the replacement board will match our existing system?

The DS200TCTSG1A has an A-rated functional revision that may alter performance specifications from the original DS200TCTSG1 model. Before ordering, verify your existing board’s functional revision and connector layout. Check that the replacement has the same 3x 16-pin (JDR, JDS, JDT) and 2x 12-pin (JN, JM) connectors.

The DS200TCTSG1A is showing a trip condition but we cannot identify which parameter triggered it. How do we trace the source?

The DS200TCTSG1A monitors pressure, temperature, and flow parameters, initiating a trip when any value exceeds predefined thresholds. Check the LED indicators on the board for trip status, and review the Mark V HMI for fault codes. The board uses signal isolation to prevent external interference, so verify sensor inputs at the terminal board connections.

One of the relays on our DS200TCTSG1A failed. Can we replace just the relay, or do we need a new board?

The DS200TCTSG1A uses plug-in relays that can be replaced if they stop working. Remove power from the drive first, disconnect cables, remove the board, and follow GE manual instructions for relay replacement. The wire retention clips snap off the bottom of the connector, allowing you to pull the relay up and install a replacement.

We are upgrading from a simplex to a TMR turbine control system. Can the DS200TCTSG1A still be used, or do we need a different board?

The DS200TCTSG1A is specifically designed for simplex configurations, unlike TMR (Triple Modular Redundancy) systems which use a different board type. If you are upgrading to a TMR system, you would need the corresponding TMR trip board. The DS200TCTSG1A should only be used in simplex applications.

The DS200TCTSG1A has been in storage for several years. What should we check before installing it in a running turbine system?

The DS200TCTSG1A is a static-sensitive PCB with normal coating. Before installation, inspect the gold edge connector for oxidation and check all 12 plug-in relays for physical damage. Verify the functional revision matches your system requirements. Handle the board with proper ESD protection and follow the installation instructions in the Mark V manual.

Moore Automation

Moore Automation supports power generation facilities with legacy turbine control systems. Our focus is on helping plants maintain GE Speedtronic Mark V systems when original OEM support is no longer available and replacement parts become increasingly difficult to source.

We understand the urgency of turbine outages. When a trip board fails, every hour of downtime costs money. Our team provides fast quotes, verified condition reports, and shipping options that align with your maintenance window — not against it.

Verified condition reports with detailed photos before shipment
Functional revision matching for GE Mark V boards

Supported Brands

GE Bently Nevada Woodward ABB Emerson Triconex Honeywell Siemens

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