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GE DS200DTBBG1A Contact Input Expansion Termination Module Item NO.: 2906990

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Product Name	GE DS200DTBBG1A Contact Input Expansion Termination Module
Item NO.	2906990
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	GE
Brand	GE
Creation Time	2026-09-10

GE DS200DTBBG1A Contact Input Expansion Termination Module

Mark V LM Contact Input Expansion

GE DS200DTBBG1A Contact Input Expansion Termination Module

The expansion contact-input terminal board in a Mark V LM digital core, carrying the last 46 field inputs to TCDA.

Product Overview

GE DS200DTBBG1A identifies the first functional-revision family of the DTBB Contact Input Expansion Termination Module. DTBB is installed at location 7 in the Mark V LM digital I/O cores.

The board connects the last 46 contact inputs to TCDA through JRR. It receives 125 VDC contact-interrogation power from the DTBA board through JY.

As with the primary DTBA board, the associated TCDA I/O configuration can invert contact sense for fail-safe behavior. BJ1 through BJ5 isolate input groups from 125 VDC during defined test procedures.

Technical Specifications

Specification	Technical Data
Brand	GE
Model	DS200DTBBG1A
Product Type	Contact input expansion termination module family
Country of Origin	United States
Control Platform	SPEEDTRONIC Mark V LM
Functional Acronym	DTBB
Digital-Core Location	7
Contact Inputs	Last 46 inputs in the digital core
TCDA Interface	JRR
125 VDC Source	JY from DTBA
Normally Unused Connectors	JRS and JRT
Test-Isolation Jumpers	BJ1 through BJ5
Software Function	Contact-sense inversion in TCDA I/O Configuration
Reference Manual	GEH-6153

Expansion Input Termination

Last 46 contact inputs in the digital core

DTBB extends the input termination after the first 46 points handled by DTBA. JRR transfers the expansion input group to TCDA in the same digital core.

Location 7 is assigned to DTBB.
JRR is the contact-input signal interface to TCDA.
JY receives interrogation power from DTBA.

Installation and Diagnostics

Keep the primary and expansion boards paired

The DTBA and DTBB boards divide the contact-input population into first and last groups. Their JY power link and separate JQR/JRR signal paths must remain correctly identified during replacement.

Do not interchange JQR and JRR cable assignments.
Record BJ1–BJ5 positions before service.
Verify the TCDA inversion settings after replacement.

Technical Questions

How many inputs are associated with DS200DTBBG1A?

DTBB connects the last 46 contact inputs in its Mark V LM digital core.

Which connector carries DS200DTBBG1A signals to TCDA?

The JRR connector carries the expansion contact-input signals.

How does DS200DTBBG1A receive 125 VDC interrogation power?

It receives that supply from DTBA through JY.

What is the difference between DTBA and DS200DTBBG1A?

DTBA handles the first 46 contact inputs; DTBB handles the last 46 expansion inputs.

Where is contact-sense inversion configured for DS200DTBBG1A inputs?

It is configured in the associated TCDA I/O Configuration.

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GE DS200DTBBG1A Contact Input Expansion Termination Module Item NO.: 2906990

GE DS200DTBBG1A Contact Input Expansion Termination Module

Product Overview

Technical Specifications

Expansion Input Termination

Last 46 contact inputs in the digital core

Installation and Diagnostics

Keep the primary and expansion boards paired

Technical Questions

Industrial System Component Range

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