GE DS200DTBBG1A Contact Input Expansion Terminal Board

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Product Overview

The GE DS200DTBBG1A is a DTBB contact input expansion terminal board for the SPEEDTRONIC Mark V LM turbine control system. It brings the last 46 field contact inputs in a digital I/O core to the TCDA board, where contact states are processed. The board receives contact-interrogation power from the companion DTBA board through its JY connection. Together, DTBA and DTBB provide separate signal paths for the core’s two contact-input groups. 

Technical Specifications

Features

• Terminates the last 46 contact inputs in a digital I/O core
• Sends contact signals to TCDA through the JRR connection
• Receives 125 VDC interrogation power from DTBA through JY
• Includes five jumpers, BJ1–BJ5, for contact-input group isolation
• Supports contact-sense inversion through the associated TCDA configuration  

Industries Served
-Power Generation: Connects turbine field contacts used for operating status, alarms and control indications in Mark V LM systems.
-Oil and Gas: Supports contact monitoring on sites using Mark V LM-controlled gas turbines to drive generation or process equipment.
-Industrial Utilities: Provides additional contact-input termination for facilities operating Mark V LM turbine-generator systems.  

Frequently Asked Questions

1. What is the role of DS200DTBBG1A?
It terminates the last 46 field contact inputs in a Mark V LM digital I/O core and routes them to TCDA.
2. How does DTBB differ from DTBA?
DTBA handles the first 46 contact inputs; DTBB handles the last 46. They use separate connections to TCDA.
3. Where does DTBB receive contact-interrogation power?
The board receives 125 VDC from DTBA through connector JY.
4. Which board processes changes in contact state?
TCDA conditions the contact signals and processes their changes of state. DTBB provides the field termination and signal path.